CN1258412A - Twisted pair communication system - Google Patents

Abstract

A communication system for passing information between information services and terminal devices over a twisted wire pair network. The information services include a telephone exchange and other services, such as a data network and a television distribution system. The terminal devices include telephones and other devices, such as computers and televisions. The system includes a main information interface coupled to the information services and a twisted pair wiring network coupled to the terminal devices and to the main information interface. The wiring network includes multiple active telephone pairs for passing voice signals between the telephone exchange and telephones. The information interface includes circuitry for combining on the active telephone pairs a) telephone signals in a telephone frequency band passing between the telephone exchange and the one or more telephones and b) high frequency signals in a high band of frequencies higher that those of the telephone frequency band passing information between the other information services and one or more of the terminal devices.

Description

Twisted pair communication system

The present invention relates to information, for example computer data or video, by unshielded twisted pair (UTP), the used unshielded twisted pair of telephone communication in the building for example, the communication of carrying out.

Referring to Fig. 1, in the ordinary course of things, building 100a is connected to multiple external information system, and the communication of interior of building can be used different cable networks.Information system can comprise public switched telephone network (PSTN) 120, television distribution system 124 and data network 122.Building 100a can be single family residence, multiple unit residence, perhaps office building.

PSTN 120 is connected to building 100a by one or more UTP cables 121.UTP cable 121 comprises that a plurality of lines are right, and each line is to providing the telephone line of going out for building.Television distribution system 124 can be cable or satellite TV system, and it generally is a coaxial cable by broadband connection 125, and the TV signal of a plurality of channels is provided.

Data network 122, for example the internet is connected to building 100a with one of some different modes, provides to connect (for example 1Mb/s or higher rate) at a high speed.Data network 122 can connect by PSTN 120, uses one or more UTP cables 121 to transmit data back and forth with building 100a.For example, two twisted-pair feeders can carry the data of T1 or fractional t1 form, and wherein these twisted-pair feeders are exclusively used in data.Another kind of scheme is, data network 122 can pass through some UTP cables 121, utilizes Digital Subscriber Loop (DSL) signaling technology to be connected to building 100, and wherein the frequency range that transmits of data communication is different from by the telephone communication of same line to transmission.

Data network 122 also can be connected to building 100a by television distribution system 124.For example, bidirectional data communication can pass through cable TV dissemination system and TV programme parallel convey.

In building 100a, UTP cable 121 terminates in telephony interface 132, for example Master Patch Panel.Similarly, broadband connection 125 terminates in television interface 152.Data network 122 is connected to equipment among the building 100a by data-interface 142.If data network 122 connects by PSTN120, data-interface 142 provides the interface that is applicable to used signaling type (for example T1, DSL) so.If data network 122 connects by television distribution system 124, data-interface 142 can be the wire line MODEM that is connected to broadband connection 125 by television interface 152 so.

In building 100a, be generally phone, data and TV signal and use different networks.Telephone line network 130 is connected to phone interface 132 and PSTN 120 with phone 134.If do not adopt telephony switching gear in building 100, telephone line network 130 and UTP cable 121 provide the continuous electrical path of telephone exchange from each phone 134 to PSTN 120 so.If a plurality of phones 134 are extension sets of same telephone wire, they can be connected to same conductive path so.

Data cable network 140 is connected to data network 122 by data-interface 142 with one or more computers 144.The common form of the data cable network that uses in the building is deferred to one of Ethernet protocol (IEEE STD 802.3,802.12), for example 10BaseT, 10Base2,100BaseT 4 or 100VG.

In 10BaseT, each data communication path comprises two UTP, and computer 144 is connected to data-interface 142.Traffic rate is 10Mb/s.If a plurality of computers 144 are connected to data wire road network 140, data wire road network 140 can comprise a hub (not shown) that is connected to data-interface 142 and each computer 144 so.Each computer 144 comprises network interface controller (NIC), for data wire road network 140 provides suitable electrical interface.According to IEEE 802.3 standards, if there is not intermediary's hub, the 10BaseT communication path should be no longer than 330 feet.

Connect among two UTP of two communication equipments, a UTP is used in the communication on each direction.This two UTP and not meaning that communicate by letter on both direction simultaneously.But, also have the situation that these two equipment send unintentionally simultaneously.

In 10BaseT, equipment should not send from the miscellaneous equipment received signal time.Therefore, the situation that sends immediately of both sides only may appear at each side receive the occasion that began to send before the signal that the phase negative side sends.This has formed the situation of a kind of being called " conflict ".

When conflict takes place, require each equipment to suspend its transmission, wait until that always they are not during received signal.After a period of time of mourning in silence, each equipment can be attempted sending once more.

Therefore, if 10BaseT equipment just outside it outlet on send, it must monitor that to enter line right, only in order to determine whether the other end has sent the signal that causes conflict.This equipment does not need to explain the information that sends in the signal that causes conflict.

The signal that equipment sent is used to transmit binary data stream is the Manchester coding of binary data stream.The Manchester coding of data flow is a binary signal, and each input bit has at least one migration.For the 10Mb/s data flow, the frequency spectrum of encoded data stream extends to 15MHz from 3MHz approximately.

At 10Base2, in the 2nd 10Mb/s IEEE 802.3 standards, data communication path comprises single transmission line, generally is coaxial cable (for example RG-58), and computer 144 is connected to data-interface 142.In this case, data wire road network 140 can be set as star like arrangement, perhaps can move by the daisy chain mode, and a plurality of computers 144 are connected to data-interface 142.If 10Base2 equipment passes the signal to transmission line, it uses the similar Manchester coding that adopts among the 10BaseT so.A plurality of 10Base2 equipment are from same circuit received signal.

In 10Base2, if two equipment send simultaneously, cause conflict, equipment detects conflict by the DC level that monitors received signal so.When an equipment sent, it provided direct current branch on transmission line.Even second equipment sends, also can detect this branch.

Ieee standard is called out and is required 10Base2 and 10BaseT to have the identical traffic level, but the minimum incoming level of 10Base2 is than the low 6dB of 10BaseT.

The circuit of changing between the used signaling of 10BaseT and 10Base2 standard can be bought from many manufacturers there.This circuit is commonly referred to as " medium transducer ".A kind of integrated circuit medium transducer, the LXT906 integrated circuit can be bought from Level One company.

At 100BaseT 4, in 100Mb/s IEEE 802.3 (u) standard, communication is undertaken by 4 UTP.When sending, this equipment takes out 3 in 4 UTP, send 33.3Mb/s on each in these 3 UTP.When receiving, this equipment receives 33.3Mb/s on 3 of 4 UTP, comprise that it is not used in the UTP of transmission.The UTP that is not used to send is used for collision detection, as the 10BaseT two-wire to standard.Data flow to each 33.3Mb/s is carried out block encoding, obtains a signal, and this signal does not have too macro-energy at voice grade, and expands to about 25MHz.

At 100VG, in 100Mb/s IEEE 802.12 standards, communication is also undertaken by 4 UTP.When sending data, equipment sends 25Mb/s on each of 4 UTP.In 100VG, not to depend on the collision detection scheme, but during data send, provide the permission that sends to individual equipment sometime by hub.Non-answer zero (NRZ) signaling schemes is used to send data, and the coded data that obtains expands to about 15MHz.

Tv line network 150 makes coaxial network (for example RG-6), and it is connected to television distribution system 124 with each TV 154 by television interface 152.Telephone line network generally to be tuned to a plurality of TVs 154 of required channel identical broadband signal is provided.TV 154 can be connected to TV wired network 150 by " top setting box " (not shown) that tuning capability is provided.Some top setting boxs also provide a kind of the mode of television distribution system 24 are beamed back in control information, for example to order the film of watching pay (pay-per-view) at every turn, perhaps provide interface TV (ITV) function.

Computer 146 also can utilize the telephone modem 147 that is connected to telephone line network 130, is connected to data network 122 by dial telephone.Telephone modem can adopt the analogue signalling in the voice frequency section.The analog telephone modems support is lower than the relatively low data rate of 56kb/s.Computer 146 also can be connected to TV wired network 150 by wire line MODEM 148.

Most of buildings have telephone line network, may not have data wire or tv line network.In general aspect, the invention provides a kind of like this method and apparatus, utilize that the existing telephone spider lines carries out the two-way communication of data and TV signal in this building, and telephone communication, thereby the required cost of this communication capacity of configuration in building reduced.In addition, TV and computer are connected to the phone cable network, and do not need to adopt the complex interface electronic component, can not disturb the existing telephone business.Characteristics of the present invention also are new communication media transducer and data hub, and its scope is expanded to some extent, and safety strengthens to some extent, and the circuit demand decreases.The existing telephone spider lines also can be equipped with the equipment that has synthesized filter and terminator, to improve the communication capacity of cable network.

The present invention can be applied to many situations, is included in the multiple unit building, for example in the apratment building thing or hotel of existing telephone line network, increases data and TV and communication ability.

In one aspect, the present invention generally speaking is a kind of communication system that communicates between a plurality of terminal equipments and multiple information service by twisted-pair wire net, aforementioned terminals equipment comprises one or more phones, and the aforementioned information service comprises telephone exchange and out of Memory service.This system comprises the main information interface that is connected to information service, and the twisted-pair wire net that is connected to terminal equipment and main information interface.This cable network comprises that a plurality of to enliven telephone wire right, is used for transmitting voice signal between telephone exchange and one or more phone.This information interface is included in and enlivens the circuit of telephone wire to the following signal of last combination: a) telephone signal in the phone frequency range that transmits between telephone exchange and one or more phone, and b) be positioned at the high-frequency signal of higher frequency band, this frequency range is higher than the phone frequency range of the information that transmits between out of Memory service and one or more terminal equipment.

Method of the present invention comprises one or more following characteristics.

The out of Memory service can comprise data network, and terminal equipment can comprise computer.Then, main information interface also comprises the data hub, is used for transmission information between computer and data network.

The out of Memory service can comprise the television distribution service.

Twisted-pair wire net can comprise many cables that are connected to main information interface and terminal equipment, these cables form the individual path from main information interface to terminal equipment, cable network comprises the junction point on the cable branch point, in order to reduce the degradation of signals on the high-frequency band.

Terminal equipment can comprise television receiver and relevant remote control equipment, main information interface can comprise a video selector, it is connected to an information service, comprise receiver and transmitter, receiver is accepted the control information that remote control equipment sends in high-frequency band by twisted-pair wire net, transmitter provides TV signal to television receiver by twisted-pair wire net in response to control information on high-frequency band.Video selector can comprise a tuner of selecting television broadcasting.This video selector can also comprise the computer that is connected to data network, and control information comprises the information of identification data net source of video information.

This communication system can comprise secure circuit, is used to prevent that the information that transmits between terminal equipment and information service is sent to another terminal equipment.Secure circuit can comprise a data hub, its a plurality of ports are connected to terminal equipment, a port is connected to data network, this data hub comprises such circuit, and this circuit is used to prevent to be connected to the data that receive on the port of terminal equipment and is sent to the port that is connected to other terminal equipment.This hub also comprises such circuit, and this circuit is used to prevent to be connected to the data that are addressed to certain terminal equipment that receive on the port of data network and is sent to the port that is different from the port that terminal equipment connected that is addressed.

This system also comprises the circuit of minimizing by the degradation of signals of cable network transmission.This circuit can comprise the circuit of amplifying signal, and the circuit of equalizing signal.This circuit can also comprise reduce circuit between the circuit of cross-talk.

This system also comprises the medium transducer, wherein the medium transducer is connected to information service by multiple conducting wires, and be connected to cable network by the lead of lesser amt, the medium transducer comprises by multiple conducting wires and receives information from information service, and this information sent to the circuit of cable network by the lead of lesser amt.The medium transducer can will become to send to a line to last signal to the 10BaseT conversion of signals that receives by two lines.

Fig. 1 shows phone, computer and the television set that is connected to telephone network, data network and television distribution system in the building by different cable networks;

Fig. 2 shows phone, computer and the television set that is connected to telephone network, data network and television distribution system in the building by public UTP network;

UTP network shown in Fig. 3 comprises that there is thread path in branch, and the phone, computer and the television set that are connected to socket in thread path is arranged;

UTP network shown in Fig. 4 comprises a plurality of unit cable network, and each unit cable network is directly connected to main information interface;

A plurality of unit cable network is connected to main information interface by intermediary's cable network and a plurality of intermediaries distribution interface in the UTP network shown in Fig. 5;

Fig. 6 shows the distribution of line to last bandwidth;

Fig. 7 a-c has illustrated the frequency spectrum that arrives 3 kinds of schemes of 10Mb/s signaling on a UTP;

Fig. 8 shows speech, data and the video line concentrator that phone, computer and television set is connected to external information service;

Fig. 9 shows speech, data and the video signal path that a UTP connects;

Figure 10 shows the detailed signal path that a UTP connects;

Figure 11 shows the medium transducer that two UTP 10BaseT signals is connected to single UTP;

Medium transducer shown in Figure 12 is used to change the 10BaseT signal, to communicate by letter on the single UTP of enlivening;

Figure 13 shows and is used to change the 10BaseT signal, with the another kind of optional medium transducer of communicating by letter on the single UTP of enlivening;

Medium transducer shown in Figure 14 is used to change the 10BaseT signal, to enliven on the UTP and a plurality of devices communicatings single;

Medium transducer shown in Figure 15 is used for becoming 3 to enliven UTP the 100VG conversion of signals;

Medium transducer shown in Figure 16 is used for 100BaseT 4 conversion of signals are become 3 UTP;

Figure 17 shows safe hub;

Figure 18 shows the physical layer circuit of spreading range hub;

Figure 19 shows simple cable network;

Figure 20 shows the cable network with fractionation and branch;

Figure 21 a-b shows a junction point;

Figure 22 a-c shows passive high frequency junction point;

Figure 23 a-b shows active high frequency junction point;

Figure 24 a-d shows a kind of possibility that speech, data and video line concentrator is connected to cable network;

Figure 25 a-b shows wall jack;

Figure 26 a-c shows optional wall jack;

Figure 27 shows the data hub that is connected to wall jack;

Figure 28 shows the data hub in intermediary's distribution interface;

Figure 29 a-b has illustrated a kind of embodiment that comprises the data hub in intermediary's distribution interface; And

Figure 30 a-c has illustrated the video selector embodiment that comprises the WebTV interface.

1 summary (Fig. 2-5)

Say it is that a plurality of external information service are connected to distinct device by the bidirectional communication link in the building on the overall system that describes below.External information service comprises phone, data and television system, and these equipment comprise phone, computer and TV.In building, it is the public infrastructure device at center that communication link is shared with unshielded twisted pair (UTP) network, the type of UTP network be used for the identical of telephone communication.Although described by the communication in the building, this system schema also can be used to link the equipment in the garden that a plurality of buildings form.In addition, in some system schemas, the communication between equipment and PERCOM peripheral communication service, perhaps the substitute is, support the communication between the equipment in the building.For example, a plurality of computers in the building can communicate with one another and not need to be connected to external data network.

Referring to Fig. 2, some external information service are connected to building 100b.These services comprise public switched telephone network 120, data network 122, for example internet, and television distribution system 124, for example cable television system.These services are connected to the main information interface 200 in the building.In this embodiment, main information interface 200 is connected to PSTN 120 by UTP cable 121, and by broadband connection 125, for example coaxial cable or optical fiber are connected to television distribution system.Main information interface 200 or by PSTN 120 perhaps is connected to data network 122 by television distribution system 124, and this connections provides with the form of logic connection 123.

Main information interface 200 is connected to the UTP network 250 among the building 100b.According to the present invention, UTP network 250 provides public communication link to phone 134, computer 144 and TV 154, and these device distribution are around building.

Notice that " phone " can be to connect any in the plurality of devices of telephone wire, comprises phone, transponder and facsimile machine." computer " can be any equipment of data communication interface.Except desktop computer and laptop computer, these equipment can comprise annex, perhaps have the miscellaneous equipment of its communication ability." TV " can comprise television receiver, and television receiver, wireless remote control and the combination of the top setting box of interactive television (ITV) service is provided to the user.In this ITV service, passed back television distribution system from the order of wireless remote control, to act on the TV signal that offers the user.

Referring to Fig. 3, UTP network 250a (example of UTP network 250 among Fig. 2) has illustrated the branched structure that may have in the single home dwelling.In this embodiment, the UTP cable (one or more line halved ties, generally be in the dwelling house one or two line to) provide wired connection for main information interface 200.In order in a plurality of wall socket 300a-c, to provide service, this cable can daisy chaining to socket, can on one or more points, divide along its path, form branch's tree.In Fig. 3 kind, socket 300a provides the socket that daisy chain connects.Socket 300b is positioned at the split point of cable.Socket 300c is the terminating chalaza of cable.Phone 134, computer 144 and TV 154 are connected to socket 300a-c.

Referring to Fig. 4, another UTP network 250b is the cable network type that possible appear in less a plurality of apartments.There is the unit UTP network 400 of himself each unit, and it is directly connected to main information interface 200.The similar of each unit UTP network 400, divides on cable trace by the structure shown in the daisy chain socket in Fig. 2.

Referring to Fig. 5, another UTP network 250c illustrated and may appear at bigger building, for example the cable network type in hotel or the apratment building.Different unit UTP networks 400 provide service to different unit.In this case, each unit UTP network 400 is connected to intermediary's distribution interface 520.Then, intermediary's distribution interface 520 is connected to main information interface 200 by the UTP of intermediary network 500.For example, intermediary's distribution interface 520 can be positioned on each layer of building, provides service to the unit of this layer.Intermediary's distribution interface 520 provides such point, leads to the cable of unit UTP network 400 at that point and be connected to by the UTP of intermediary network 500 between the cable of main information interface 200 to set up physical connection.

2 signalings (Fig. 6-7)

The conventional method of uploading feed signals at UTP network 250 (Fig. 2) is to be used for upward multiplexed signals of the UTP cable of telephone communication (promptly enlivening UTP).The high-frequency band of multiplexed signals is higher than the frequency that plain old telephone signal post uses.The frequency range that plain old telephone signal post uses expands to about 3.3kHz.This high band can expand to 32MHz or higher from the phone frequency range, but still enough signalings are provided in building.If it is still available not to be used for the UTP cable of telephone communication, so also use these cables, as replenishing of the UTP cable that is used for telephone communication, perhaps replace product.

Referring to Fig. 6, as follows in the preferred allocation of enlivening the frequency range that is used for this system on the UTP:

0-3.3kHz: be used for the two-way communication between phone 134 and the PSTN 120

Phone frequency range 610.

2-2.5MHz: be used for from terminal equipment, for example from the Long-distance Control of TV,

Control signal is sent to the control frequency range 620 of main information interface 250.

3-15MHz: be used for two between computer 144 and the main information interface 250

Data band 630 to communication.

17-32MHz: be used for transmitting modulated to TV 154 from main information interface 250

TV signal, for example TV band 640 of the modulated NTSC composite signal of FM.

Enlivening on the UTP, the part of phone frequency range 610 also can be as the part of data band 630.Especially following particular data signaling schemes (for example 10Base2) uses lower frequency to carry out collision detection.

2.1 data signaling (Fig. 7)

In different system schemas, the signaling of data band 630 is based on IEEE 802.3 " Ethernet " standard, perhaps Xiang Guan 802.12 standards.Particularly the signaling on UTP or two UTP is relevant with the 10Base2 standard with 10BaseT, and these two standards are used between equipment, for example between computer and data communication hub and the router, provide 10Mb/s data communication.Relevant with 100VG 100Mb/s standard more than the signaling on two UTP with 100BaseT 4.

2.1.1 10Mb/s by a UTP

The different system scheme can be used a kind of 10Mb/s of transmission data in some signaling schemes by single UTP.These schemes comprise:

1. standard 10Base2 signaling;

2. stop the improved 10Base2 signaling of on the phone frequency range, transmitting; And

3. stop the improved 10Base2 signaling of on the phone frequency range, transmitting, wherein

Each equipment sends the transmission notice sound at data band.

Referring to Fig. 7 a, in first scheme, data are by adopting the single UTP transmission of the defined signaling of 10Base2 standard.According to this standard, the lower frequency 710 of close DC is used for collision detection.This signaling transfer scheme be not used on the UTP of telephone communication feasible because lower frequency 710 may interfering phone communication.

Referring to Fig. 7 b, the improved 10Base2 signaling schemes that a kind of prevention is transmitted on lower frequency.To describe below comprehensively, and adopt the collision detection scheme of this signaling transfer scheme only to use the signal of data band 630.Because the phone frequency range is not used in this improved signaling transmission, so the UTP that it can be used to enliven.

Referring to Fig. 7 c, the signaling schemes of the UTP that another kind can be used for enlivening, it adopts the signal tone in the data band 630 to detect conflict.If two equipment adopt the signaling schemes communications of this improvement 10Base2, each equipment adopts signal tone (or certain other narrow band signal) to show that it sends so.The frequency difference that the signal tone of two equipment distributes, in this system, 720a is 4.5MHz, and 720b is 5.5MHz.Send on the frequency of equipment in two frequencies, monitor on another frequency in two frequencies, clash determining whether.

Although the transmission signal tone frequency of 4.5MHz and 5.5MHz is positioned at the coded data frequency range that these equipment sends, select these frequencies to be because on these frequencies, can adopt not expensive ceramic filter.The bandwidth of these filters is about 0.3MHz.Because this is the bandwidth of relative narrower, so this bandwidth of filtering is not too large to the influence of encoded data signal on the frequency of two sounds.

In some system schemas that adopt this improvement 10Base2 signaling, two or more equipment are shared same transmission signal tone frequency.For example, a plurality of computers in certain unit can use a signal tone frequency, and Remote Line Concentrator can use another frequency.In this system, share the signal tone of necessary concurrent this frequency of transmission of equipment of same transmission signal tone frequency, and detect the signal tone that another equipment may send in same frequency.

As in data band 630, adopting a kind of possibility that sends the signal tone frequency, can select the following signal tone frequency of 3MHz, to avoid overlapping with data band.

2.1.2 10Mb/s by two UTP

Adopt standard 10BaseT signaling by the data communication of two UTP.According to the 10BaseT standard, do not need to use any lower frequency signal, just can finish collision detection, therefore, the data communication of carrying out on each of two UTP can not disturbed the phone voice grade on arbitrary UTP.

2.1.3 100Mb/s by 3 or a plurality of UTP

Utilize standard 10BaseT4 and 100VG signaling, the communication between two equipment all needs 4 UTP.Unfortunately, the wiring in the multiple unit building seldom can make the UTP that arrives each unit more than 3, only comprises 2 in some structures.According to the present invention, some system schemas have adopted the UTP that uses to be less than a kind of in two kinds of 100Mb/s signaling schemes of 4.

In standard 100BaseT 4 systems that two equipment (being computer and hub) are communicated by letter, whenever all have only 3 UTP to be used for from an equipment sending data to another equipment, use the different subclass of 3 UTP to receive data from miscellaneous equipment.When sending, this equipment is monitored the 4th UTP to detect conflict.

In a 100Mb/s signaling schemes, have only 3 UTP to be used for transfer of data and collision detection.When sending, equipment sends data according to the signaling schemes that uses in the 100BaseT 4 in the data band 630 on 3 UTP.This equipment also provides direct current branch on the UTP in 3 UTP, and whether the detection miscellaneous equipment also provides DC branch on same UTP.Other two UTP can use the phone frequency range to carry out telephone communication, because 100BaseT 4 data signalings on each UTP can the interfering phone frequency range.

A kind of replacement scheme that adopts DC branch to carry out collision detection is, uses the signal tone scheme that sends, and this scheme is similar to a kind of scheme that adopts in the 10Base2 signaling schemes of aforementioned improved.

The 2nd 100Mb/s signaling schemes is based on 100VG (IEEE 802.12) standard.In the 100VG system, on 4 UTP, send 4 differential signals.In our the 2nd 100Mb/s signaling schemes, 3 UTP have only been used.4 differential signals adopt the difference on 3 UTP and the combination of utility mode signal to encode.In a kind of example of this signaling schemes, differential signal sends with the form of the difference of the utility mode signal on two UTP.Remaining 3 differential signal is not done to send on 3 UTP with the form of differential signal with changing.Notice in principle, on 3 UTP that 6 circuits are formed, can send nearly 5 different signals, but only need 4 signals.According to the 100VG standard, do not use the phone frequency range, thereby 3 UTP that are used for this 100Mb/s signaling also can be as enlivening telephone line.

2.1.4 10Mb/s by a plurality of UTP

Data flow is divided, also can be used for long distance with the conventional method that on a plurality of UTP, transmits and send the 10Mb/s signal.This scheme relates generally to standard 10Mb/s data flow is divided into N parallel flow.Then, these streams are sent by the communication path of being made up of N+1 UTP.N UTP is used to send the data flow after the division.Because data rate is lower,, thereby the scope and the robustness of signaling have been increased so it is lower to send required frequency range.During sending, monitor N+1 UTP to detect conflict.For example, use 5 UTP, the 10MB/s data flow is become 4 2.5Mb/s streams with 1: 4 demultiplexing, on 4 different UTP, adopt to be similar to Manchester encoding scheme transmission used among 10BaseT or the 10Base2.Because data rate reduces,, in this 1: 4 demultiplexing scheme, expand to about 3.75MHz so frequency spectrum is expanded.

2.2 TV signaling

Referring again to Fig. 6, the signaling of TV band 640 has adopted the FM modulation scheme of synthetic NTSC signal.Synthetic NTSC signal comprises that frequency spectrum arrives the vision signal of about 4.5MHz, and near the modulated audio signal of 4.75MHz.Composite signal is to 32MHz with the about 17MHz of the modulation spread spectrum of frequency spectrum FM as a result.Select the low side of this scope, 17MHz is to provide the data band of abundant unpack format, and this data band extends to about 15MHz.Select the high-end of this scope, 32MHz conflicts with US FCC regulation avoiding.

Also can use other TV signaling.Especially can adopt digitally coded TV signal.For example, adopt quadrature amplitude modulation (QAM) scheme, the coded digital TV signal can occupy the frequency range from 1MHz to 3MHz.Therefore, as adopting frequency to be higher than the alternative of the TV band of data band, the Digital Television frequency range can be on the frequency between phone frequency range and the data band, thereby can not disturb two frequency ranges in addition.

3 signalings distributions (Fig. 8-10)

According to the preferred embodiment of native system, adopt aforementioned signaling schemes to carry out channeling to phone, data and vision signal.Signal after multiplexing is distributed by UTP cable network 250 (Fig. 2) from main information interface 200.

3.1 single line is to distribution

Referring to Fig. 8, a kind of preferred embodiment of native system uses single UTP distribution multiplexed signals.Main information interface 200 comprises speech, data and video line concentrator 800, and it is connected to UTP network 250 with phone, data and Video service.Hub 800 is connected to the UTP network by terminal block 805.In UTP network 250, socket 300 provides terminal equipment to be connected to the point of UTP network 250.Terminal equipment comprises phone 134, computer 144, TV 154, and Long-distance Control 834, is connected to socket 300 and top setting box 832 by wall adapter 830.Medium conversion and channeling and demultiplexing function are finished in hub 800, wall adapter 830 and top setting box 832 cooperations, to provide communication service to terminal equipment.

Speech, data and video line concentrator 800 have 3 being connected to external call, data and TV service.Hub 800 is connected to UTP cable 121, and the latter provides telephone service from PSTN 120.Hub 800 is also connected to data hub 815 and video source 820.Data hub 815 makes that computer 144 can be by data network 122 communications.In some system schemas, data hub 815 also makes computer 144 to communicate with one another.In other system schema, as a safety measure, the data communication that data hub 815 stops between the computer 144.Video source 820 is accepted from the control information of Long-distance Control 834 initiations, and is provided at the TV signal that shows on the corresponding TV 154.

In this system schema, computer 144 and data hub 815 have the 10BaseT data-interface of standard.In addition, the data communication in the UTP network 250 uses single active UTP to carry out data communication between each computer.

Referring to Fig. 9, speech, data and video line concentrator 800 comprise different transducer 900, and each enlivens 810 1 of telephone wires.In this system schema, transducer 900 links to each other with specific wall adapter 830.For example, transducer 900 is connected to wall adapter 830, and is connected to the UTP 121 that telephone communication is provided to PSTN 120.Transducer 900 is connected to a pair of 10BaseT UTP, receives UTP 802 and sends UTP 804, provides with the 10BaseT of 10Base T data hub 815 and communicates by letter.Transducer 900 is connected to UTP 806, accepts vision signal from video source 820, and provides control signal to video source.

Still referring to Fig. 9, video source 820 comprises video converter 920, and each is connected to corresponding converter 900 by UTP 806.Signal transmits by UTP 806 on this both direction.Each video converter 920 is accepted control information from corresponding converter 900, and control information is offered video selector 930, and the latter then provides a TV signal, returns to video converter.

Referring to Figure 10, the detailed signal path of a UTP 810 of UTP network 250 can be from transducer 900 by wall adapter 830 and top setting box 832.Send transducer 900 from the telephone signal in the phone frequency range of PSTN 120 to by UTP 121.Telephone signal is by low pass filter (LPF) 1020, and the latter can pass through the phone frequency range.Telephone signal by LPF 1020 continues finally to arrive wall adapter 830 by UTP network 250.In wall adapter 830, signal is by LPF 1040, and the latter sends telephone signal to phone 134.

LPF 1020 also passes through DC.PSTN 120 provides DC power by UTP 121, thereby LPF 1020 allows this power pass through, and arrives UTP 810.LPF 1054 makes that by low-down frequency DC power is recovered, thereby is wall adapter 830 and top setting box 832 power supplies.

Signal from phone 134 is sent to PSTN120 by same path in the opposite direction.

Still referring to Figure 10, computer 144 is connected to wall adapter 830 by two UTP 1082 and 1084 according to the 10BaseT standard.In wall adapter 830, these two UTP communications of medium transducer 1044 conversions are to transmit on single UTP.In this system embodiment that provides, single UTP data communication uses the transmission notification signal sound in the data band to carry out collision detection.

Data-signal is sent to balanced to unbalanced transformer/band pass filter (BPF) 1042 from medium transducer 1044.Balanced to unbalanced transformer/BPF 1042 is by data band, and balance is sent to the signal of UTP810.In wall adapter 830, data-signal is blocked by LPF 1040, BPF 1046, HPF 1040 and LPF 1054.

Data-signal sends transducer 900 to by UTP 810.In transducer 900, data-signal is sent to medium transducer 1012 by balanced to unbalanced transformer/BPF 1010.Medium transducer 1012 converts data-signal to the 10BaseT signal, and sends UTP 804 to.The 10BaseT signal is received and is handled by data hub 815.In transducer 900, LPF 1020 stops the data-signal in the data band to arrive PSTN 120 by UTP 121.

Data hub 815 at first sends the 10BaseT signal by UTP 802 to medium transducer 1012.The 10BaseT conversion of signals is become data-signal with after on a UTP, carrying out the signal transmission at medium transducer 1012, it is by the signal of reverse path after balanced to unbalanced transformer/BPF 1010 sends conversion, by UTP 810, send to medium transducer 1044 through balanced to unbalanced transformer/BPF 1042.The latter changes back the 10BaseT signal with it, and sends computer 144 to by UTP1082.

Still referring to Figure 10, TV and control signal transmit between Long-distance Control 834 and TV 154 and video converter 920.User (beholder) uses Long-distance Control 834 to transmit control signal, and for example, selects specific TV programme.Long-distance Control 834 sends infrared (IR) signal 1090 to top setting box 832.At top setting box 832, IR receiver 1062 is accepted the IR signal, converts thereof into the signal of telecommunication of coding control information.This signal is sent to control modulator 1060, and the latter modulates control signal, makes its frequency spectrum be positioned at the control frequency range.This control signal is sent to wall adapter 830 by UTP 1086.In wall adapter 830, modulated control signal is by BPF 1046, and the latter is by the control frequency range.Modulated control signal is sent to transducer 900 by UTP 810.Control signal is blocked by LPF 1020 and balanced to unbalanced transformer/BPF 1010.Control signal sends video converter 920 on UTP 806, wherein it arrives control demodulator 1036 through the BPF 1030 by the control frequency range, and the latter recovers the control signal that IR receiver 1062 is produced.The control signal of recovering is sent to video selector 930 (Fig. 9).

Passing through video converter 920 after Long-distance Control 834 receives control signals, video selector 930 sends TV signal to video converter 920.Video selector 930 comprises one group of tuner (not shown), the specific broadcasting that it provides by broadband connection 125 from television distribution net 124 based on the control signal selection that receives.

Still referring to Figure 10, video converter 920 acceptance are from the TV signal of video selector 930.This signal adopts synthetic NTSC form.In video converter 920,134 pairs of synthetic NTSC signals of video modulator carry out frequency modulation(FM), make consequential signal be positioned at TV band.This FM signal is sent to transducer 900 through the high pass filter 132 by TV signal.Then, this signal sends wall adapter 830 to by UTP 810.

In wall adapter 830, FM modulated tv signal amplifies in amplifier 1050 by HPF 1048 transmission.

Wall adapter 830 is sent to the video that connects wall adapter 830 and top setting box 832 by the DC power that will derive from UTP 810 by LPF 1054 and is connected, to top setting box 832 power supplies.Particularly, HPF 1052 transmission of the output of amplifier 1050 by blocking DC.The output of HPF 1052 is connected to the output of LPF 1054, and sends top setting box 832 to by UTP 1088.

Top setting box 832 is accepted the FM modulated tv signal and the DC power of combination by UTP 1088.In top setting box 832, FM modulated tv signal transmits by the HPF 1064 that blocks DC.The FM signal is fed to video demodulator 1066, and the latter recovers synthetic NTSC signal.Then, in NTSC modulator 1068 synthetic NTSC signal AM is modulated to the television frequency of standard, and offers TV 154, the latter is inner video and the audio component that recovers the NTSC signal in its receiving-member.

In top setting box 832, the DC power signal of importing by UTP 1088 transmits through LPF 1072, and the component that enlivens in top setting box is powered.

3.2 multi-thread data are distributed

Another preferred embodiment of native system adopts a plurality of UTP to distribute multiplexing signal.This scheme is similar to scheme shown in Fig. 8-10.

Referring to Figure 11, two UTP 810 connect transducer 900a and wall adapter 830a.Except following this point, transducer 900a is similar to the transducer 900 of Figure 10: medium transducer 1012a for example adopt standard 10BaseT signaling to transmit data, and in Figure 10, medium transducer 1012 transmits data by single UTP by two UTP.

In transducer 900a, medium transducer 1012a is connected to data hub 820 by UTP 802 and 804.Medium transducer 1012a is connected to two UTP 810 by independent BPF 1010.Two UTP 810 are connected to PSTN 120 by LPF 1020 separately.

Wall adapter 830 is connected to this two UTP 810 simultaneously.Each UTP 810 can be connected to single phone 134 by LPF 1040.These two UTP 810 are connected to medium transducer 1044a by two BPF1042.Medium transducer 1044a communicates by letter with medium transducer 1012a, transmits the 10BaseT signal back and forth between it and computer 144.

If the standard of employing 10BaseT signaling, medium transducer 1044a can directly transmit signal by a very simple medium transducer 1044a simply between BPF 1042 and computer 144, and without any need for processing.In this case, BPF 1042 can be positioned at wall socket, and like this, computer 144 is directly connected to wall socket by two UTP cables.If this socket is the Registered Jack-45 according to the 10BaseT standard wiring, computer 144 is connected to wall socket so, and resembling it, to be directly connected to 10baset hub just the same.

Still referring to Figure 11, top setting box 832 is connected to wall adapter 830a, and its mode is similar to it and is connected to wall adapter 830 among Figure 10.830 of wall adapters are connected among two UTP 810 one with top setting box, because video and control signal are multiplexing on single UTP.Vision signal from two UTP 810 is sent to top setting box 832 by HFP 1048, amplifier 1050 and HPF1052.Control signal is sent to same UTP 810 from top setting box 832 by BPF 1046.

Other a plurality of UTP devices are followed same scheme.For example, provide and computer 144 between 3 UTP data signaling schemes of 100Mb/s data communication in, computer is connected to the medium transducer in the wall adapter, 4 UTP adopt 100BaseT 4 or 100VG signaling.The medium transducer converts this signaling to 3 UTP signaling formats.These 3 signals are connected to corresponding medium transducer by 3 UTP 810, and the latter is connected to the 100Mb/s hub.

4 medium transducers (Figure 12-16)

Later referring to Figure 10, medium transducer 1012 and two UTP 10BaseT signals of 1044 conversions are to communicate by letter by single UTP in UTP network 250.Dissimilar medium transducers can be used for different system schemas.

4.1 10BaseT changes (Figure 12) to the single UTP that enlivens

Referring to Figure 12, medium transducer 1012a sends standard 10BaseT UTP 804 and receives UTP 802 and is connected to UTP 1280, and the latter uses the improved 10Base2 signaling shown in Fig. 7 c.The inner use standard of medium transducer 1012a 10BaseT-10Base2 medium transducer 1220, for example integrated circuit components numbering LXT906 that produces by Level One company, and interlock circuit, with line to 1280 interfaces.

10BaseT-10Base2 medium transducer 1220 is accepted the 10BaseT signal by the UTP802 that supports 10BaseT communication from data hub 815, and provides 10BaseT signal by UTP 802 to the data hub.

Medium transducer 1012a sends signal to line to 1280 in the following manner.

10BaseT-10Base2 medium transducer 1220 is by UTP 802 acknowledge(ment) signals, and then, the signal of deferring to the 10Base2 standard 1230 that UTP 802 will be encoded into same data flow is sent to notch filter 1232.Notch filter 1232 is ceramic notch filters, and the energy that it blocks in the 0.3MHz frequency range that is centered close to 4.5MHz transmits.Energy remaining continues to be sent to amplifier 1266 in the passband of notch filter 1232.

10Base2 signal 1230 also is sent to and sends notifying device 1234.Send notifying device 1234 and monitor 10Base2 signal 1230.If send the transmission that notifying device 1234 detects 10BaseT-10Base2 medium transducer 1220, comprise that so the maker 1236 of crystal oscillator generates a 4.5MHz harmonic wave.From the 4.5MHz harmonic wave of maker 1236 by 1238, one of band pass filters with its output energy limited at the ceramic filter that with 4.5MHz is the 0.3MHz bandwidth at center.The output of band pass filter 1238 is transmitted to amplifier 1266, wherein with its output adduction amplification mutually with notch filter 1232.

When not sending, amplifier 1266 presents very high output impedance, so that line can not increase 1280 load.

When sending, amplifier 1266 amplifies output with it and sends directional coupler 1260 to.Directional coupler 1260 suppresses signal and sends back 10BaseT-10Base2 medium transducer 1220 from amplifier 1266 by amplifier 1262.Directional coupler 1160 sends amplifying signal to UTP 1180.

Notice that being sent to line always comprises the energy " spike " that is centered close to 4.5MHz to 1280 signal.This harmonic wave is used by the medium transducer of correspondence (for example 1044 of Figure 10), also is connected to line to 1280, and when medium transducer 1012a sends to detect.

Medium transducer 1012a is sent to 10BaseT from line to 1280 with signal in the following manner.

Signal is sent to amplifier/equalizer 1262 from line to 1280 by directional coupler 1260.Amplifier/equalizer 1262 has high input impedance, makes it can detect online signal to flowing on 1280, and can not reduce the right bearing capacity of this line.

Amplifier/equalizer 1262 tilting signal spectrums that it receives are so that frequency spectrum flattens.This processing is commonly referred to as equilibrium.Amplifier/equalizer 1262 also is increased to 10BaseT-10Base2 medium transducer 1220 desirable values with the energy of signal.

Be blocked in 5.5MHz the ceramic filter of the 0.3MHz band energy that is the center by 1240, one of notch filters from the signal of amplifier/equalizer 1262.Therefore, notch filter 1240 blocks " sending notice " harmonic wave of 5.5MHz, and the latter provides by sending the medium transducer.

Signal from amplifier/equalizer 1262 also is sent to transmission detector 1250.In sending detector 1250, blocking with 5.5MHz is the ceramic band-pass filter of all energy outside the 0.3MHz frequency range at center.Be transmitted to detector 1254 from " sending notice " signal that sends the medium transducer, the latter detects this signal.

After the short transient period, whether detector 1254 is determined to send notification signal and is occurred, and provides " just in received signal " signal to the collision detection parts of 10BaseT-10Base2 medium transducer 1220.

If 10BaseT-10Base2 medium transducer 1220 receives " just in received signal " signal when sending signal 1230, it determines to have taken place conflict so.If 10BaseT-10Base2 medium transducer 1220 determines to have taken place conflict, it sends appropriate signals to the 10BaseT equipment that is connected to medium transducer 1012a on 10BaseTUTP 804 so, informs conflict has taken place.

Medium transducer 1012a is designed to and matches medium transducer (Figure 10 1044) and communicate by letter, and the latter is connected to and the difference of line to the 1280 same transmission lines that link to each other.The pairing transducer uses opposite frequency to send and detects and notice.Particularly, in pairing medium transducer, notch filter 1240 and band pass filter 1252 be tuned to 4.5MHz, and notch filter 1232, band pass filter 1238 and maker 1236 be tuned to 5.5MHz.

4.2 optionally 10BaseT changes (Figure 13) to the single UTP that enlivens

Referring to Figure 13, medium transducer 1012b is the substitute (Figure 12) of medium transducer 1012a.Medium transducer 1012b sends standard 10BaseT UTP 804 and receives UTP 802 and is connected to UTP 1280, and the latter uses the improved 10BaseT signaling shown in Fig. 7 b.

The operation of medium transducer 1012b is as follows.

Input signal flows to amplifier/equalizer 1262 from UTP 1280 by directional coupler 1260.Amplifier/equalizer 1262 is adjusted the energy value of signal, the signal on all horizontal this data band.Consequential signal is transmitted to the receiving port of 10BaseT-10Base2 medium transducer 1220.

The signal flow that sends from the transmit port of 10BaseT-10Base2 medium transducer 1220 is through amplifier 1266.Amplifier 1266 increases the energy of signal, provides this signal by hybrid circuit 1320 then.This signal arrives directional coupler 1260 by hybrid circuit 1320, arrives UTP 1280 then.

Directional coupler 1260 decay may be passed the signal of amplifier/equalizer 1262 from hybrid circuit 1320.But some energy leakages arrive the receiving port of 10BaseT-10Base2 medium transducer 1220 to amplifier/equalizer 1262.But when 10BaseT-10Base2 medium transducer 1220 was sending, it ignored the signal on its receiving port.Consequently, this transmission can be construed to the data of arrival mistakenly.

When sending, 10BaseT-10Base2 medium transducer 1220 must be careful the signal that arrives its conflict port.The key of collision detection mechanism is a hybrid circuit 1320, and it is one 3 port converter.The signal hybrid circuit 1320 between amplifier 1266 and the directional coupler 1260 of freely flowing through.

The narrow-band of the signal that hybrid circuit 1320 is only imported directional coupler 1260 sends to and sends detector 1350.Hybrid circuit 1320 decay are from the signal of amplifier 1266 inputs.

Select narrow-band to be because if the growth of the bandwidth of this frequency range, requirement simultaneously keeps tangible directivity, sharply increase of the cost of hybrid circuit 1320 so.In this system schema, directed frequency range is between 5MHz and 6MHz.This narrow-band is positioned at the low side of data band, because reduce and reduce along with frequency from the string road energy of adjacent lines.It is quite important to reduce cross-talk, because the effect of hybrid circuit is the energy that only sends by the transducer from the transmission line end opposite, passes by next any energy and block from the transmit port string of 10BaseT-10Base2 medium transducer 1220.

Like this, send detector 1350 receives 5-6MHz from hybrid circuit 1320 signal.The signal that receives is the data-signal that sends from another medium transducer, and perhaps the data-signal of this medium transducer transmission has still passed through the decay of hybrid circuit 1320.Send the energy that detector 1350 is measured in the received signal, by the appearance of plurality of data bit-detection data-signal.

Send the output that detector 1350 also receives the transmit port of 10BaseT-10Base2 medium transducer 1220.Send the energy that detector 1350 is measured in this signal, determine that 10BaseT-10Base2 medium transducer 1220 is sending signal.

Detect the transmission of 10BaseT-10Base2 medium transducer 1220 and the transmission that backward end sends detector simultaneously if send detector 1350, so the conflict port that clashes of its notice 10BaseT-10Base2 medium transducer 1220.

4.3 the 10BaseT of many equipment changes (Figure 14) to the single UTP that enlivens

Referring to Figure 14, medium transducer 1012c is very similar to medium transducer 1012a shown in Figure 12.Medium transducer 1012c has additional capabilities, can detect and the conflicting of another medium transducer with same transmission signal tone frequency.This makes, for example, a plurality of equipment in unit can be shared same transmission signal tone frequency, and data line concentration utensil has second to send the signal tone frequency.

Medium transducer 1012c is different from medium transducer 1012a in one aspect.Medium transducer 1012c comprises transmission detector 1450, and the latter sends processing signals on the signal tone frequencies at these two.BPF 1252 sends it to detector 1454 by the signal tone of 5.5MHz, and BPF 1456 is by the signal tone of 4.5MHz, the transmission signal tone frequency of medium transducer 1012c.Detector 1454 also receives the output that sends notifying device 1234.

If medium transducer 1012c sends signal to UTP 1280, the transmission signal tone of 4.5MHz is sent to directional coupler 1260 from amplifier 1266 so.Thereby directional coupler 1260 do not have this signal tone of complete attenuation, thus send that notifying device 1234 generates be sent to detector 1454 through the 4.5MHz of overdamping signal tone by BPF 1456.4.5MHz signal tone also directly is sent to detector 1454 from sending notifying device 1234.

If second website sends at 4.5MHz, but the output energy value of BPF 1456 increases, and sends the not increase of output of notifying device 1234.Like this, detector 1454 can detect the existence of second transmitting apparatus, and conflict has taken place in statement.

4.4 10 and the 100Mb/s medium be transformed into 3 and enliven UTP (Figure 15-16)

4.4.1 100VG medium transducer (Figure 15)

Figure 15 shows and is used for converting 4UTP 1530,1532,1534 to only carry the 3UTP 1540,1542 of the data-signal after changing medium transducer 1510, and aforementioned UTP 1534 is connected to standard 100VG equipment.

Medium transducer 1530 comprises converter 1520, and it is with 3 1530,1532 among 4 100VG UTP 2 of being connected among the 3UTP 1540.UTP 1534 directly is sent to UTP 1542 by medium transducer 1530.

Converter 1520 is called as " 3 go into 2 goes out " converter.Converter 1520 is sent to signal differential component on the UTP 1540 with the differential signal on the UTP 1532.Differential signal on the UTP 1530 is sent to UTP 1540, makes this differential signal can be expressed as utility mode signal poor of two UTP 1540.

100VG signal on the UTP 1530,1532 and 1534 does not use the phone frequency range to carry out data.Therefore, the switching signal on the UTP 1540 and 1542 does not use the phone frequency range to carry out data yet.This makes that all 3 UTP 1540 and 1542 can be the telephone lines that enlivens, and the interference that can not produce phone and data-signal.

A kind of possibility of medium transducer 1510 also uses public mode signal to send data.Be not to go up following code differential signal s (t) at two utility mode signal C1 (t) and C2 (t),

C1(t)＝s(t)/2

C2(t)＝-s(t)/2，

But can use 3 utility modes.Differential signal s (t) can be expressed as:

C1(t)＝s(t)/6

C2(t)＝s(t)/6

C3(t)＝-s(t)/3。

This has the following advantages: reduce the amplitude peak of utility mode signal, thereby reduce emittance.This makes the use of higher signal level become possibility.

A factor of need considering is that this utility mode signaling type not only requires to stop 3 UTP 1540 and 1542 preventing the emission on the transmitting line, but also requires to stop the utility mode transmitting line.In order to stop utility mode, conversion of signals can be returned 4 UTP, stop each among 4 UTP then respectively.

4.4.2 100BaseT 4 medium transducers (Figure 16)

Referring to Figure 16, medium transducer 1600 is connected to 4 UTP 1601,1602,1604 and 1606, and these UTP are connected to 100BaseT 4 equipment with medium transducer 1600.100BaseT 4 equipment use 3 among 4 UTP 1601,1602,1604 to send data.When sending, this equipment detects conflict by monitoring the signal on the UTP 1606.100BaseT 4 equipment receive data on 3 UTP 1601,1602 and 1606.

For the conversion of signals on 4 100BaseT 4 UTP is become 3 signals on the UTP, 3 UTP 1607,1608 and 1610 are used for the bidirectional data communication of data band.In addition, UTP 1610 is used for collision detection.

Medium transducer 1600 passes through directional coupler 1628, amplifier 1624, directional coupler 1622 and HPF 1620 by UTP 1601 and 1602 signals that receive, and finally sends on UTP 1607 and 1608.

The signal that receives on UTP 1607 and 1608 is then by opposite path, and unique is not both signal by amplifier 1626, rather than amplifier 1624.

The signal that medium transducer 1600 receives on UTP 1604 sends on the UTP 1610 then by amplifier 1624, directional coupler 1622 and HPF 1620.

The signal that receives on the UTP 1610 arrives amplifier 1638 by HPF 1620 and directional coupler 1622, sends to 100BaseT 4 equipment by UTP 1606 then.

If medium transducer 1600 from 100BaseT 4 equipment received signals, sends notifying device 1634 so and detects this signal, the DC signal is sent to UTP 1610 by LPF 1630 on UTP 1604.

If medium transducer 1600 is received signal on UTP 1607,1608,1610, send the medium transducer so and send the DC signal to UTP 1610.This DC signal flow detects by sending detector 1636 through LPF1632.

Send notifying device 1634 and carry DC branches if send the detected DC of detector 1636 branch and be not to result from, it sends a signal to amplifier 1638 so.This signal has the feature of transfer of data.This kind data-signal sends on UTP 1606, and it causes the 4 Equipment Inspection conflicts of attached 100BaseT.

5 data hubs (Figure 17-18)

Later referring to Fig. 8, if computer 144 sends data, data-signal is sent to speech, data and video line concentrator 800 by UTP network 250, sends data hub 815 then to.Typical data hub can retransmit the signal that receives on the port on all other ports, and often regenerates and amplifying signal.Therefore, the signal of transmission can be used for being connected to other computer 144 of data hub 815.

5.1 safe hub (Figure 17)

In many cases, the communication between computer 144 and the data network 122 needs, but wishes and can maintain secrecy, make computer can not other computer of interception and data network 122 between communication.

Referring to Figure 17, safety strengthens hub 1700 and comprises repeater 1710 and physical layer circuit 1720, and each port one 702,1704 of hub 1700 all has a physical layer circuit 1720.Port one 702 provides " backbone " port of the connection of data network 120, and port one 704 is provided to the connection of computer 144.Hub 1700 also comprises the safety circuit 1730 that is connected to each physical layer circuit 1720.

The function that safety strengthens hub 1700 is as follows.

In order to stop computer 144 of interception to send to the signal of other computer 144, if data are received by hub, safety circuit 1730 detects hub 1700 and whether just receives data by backbone port 1702 or by one of website end 1704 so.If data just receive from one of Site Port, safety circuit 1730 for example is different from the predetermined bit mode of the bit stream that is receiving by transmission so, notifies the physical layer circuit 1720 of other website to revise its signal of going out.Notice,, can avoid conflict, because other these computers know that another computer is sending data by sending amended data-signal to other computer.

If data just receive from backbone port, safety circuit 1730 is determined Ethernet (MAC) address of each packet so, the transmission of notifying all physical layer circuits 1720 except Site Port 1704 to block this bag then.The port that computer connected that is addressed sends the bag that it receives from backbone port.Equally, physical layer circuit is by transmission predetermined bit mode or other signal, rather than the signal of this packet of transmission coding, blocks these signals.

Notice in this scheme, only do not make to send to backbone port with changing from the broadcast packet that computer 144 receives.The broadcast packet that receives from backbone port offers all Site Ports.

5.2 spreading range hub

If data hub 185 is distal to 330 feet with distance between the computer that is connected, so because multiple factor comprises signal attenuation, can't operate as normal by the standard 10BaseT signaling transmission of two UTP.In addition, if distance less than 330 feet, but a plurality of junction points of deamplification are arranged on the path, so short but there is similar feature in the path of decay and long path.

A kind of scheme is that its minimum incoming level is provided with according to the 10Base2 standard, promptly lacks 6 dB than the 10BaseT standard, and revises the physical layer circuit in the hub in a similar manner for every computer 144 is equipped with a 10BaseT adapter.Yes that the special required cost of 10BaseT hardware is provided in every computer for the defective of this scheme, and the inconvenience that brings thus.On the other hand, if can limit the special electrical devices of hub side, so Fu Jia cost and inconvenience will significantly reduce.

5.2.1 send and incoming level

Referring to Figure 18, to compare with the standard 10baset hub, the transmission level that each physical layer circuit 1830 of spreading range hub uses increases, and minimum the reception reduced.

For example, born suitable decay at the signal that arrives hub, than the also little 2dB of the desired minimum levels of 10BaseT standard, the minimum of physical layer circuit 1830 requires level to reduce 3dB so.In this way, receive the reliability of signal of these decay and the desired reliability of ethernet standard much at one.

Consider now to send from physical layer circuit 1830, and the level of the signal that is received by standard 10BaseT adapter in the computer 144.This signal is also than the also low 2dB of the minimum levels that requires, because the transmission loss in oppositely connecting is identical.The transmission level of physical layer circuit amplifier #1850 is than the high 3dB of 10BaseT standard.Therefore, the signal that standard adapter received will have the affluence of 1dB.

5.2.2 spectral tilt

Equally, signal transmit on the twisted-pair feeder decay of being born on frequency and inhomogeneous-high frequency attenuation get faster.Therefore, " inclination " arranged in signal spectrum, this inclination increases along with the increase of line length.Therefore, the inclination by 600 feet line traffics the time may be than much bigger when 330 feet line traffics.

Spectral tilt can make electric receiver degenerate according to the ability of the reliable restore data of signal on the transmission line.A solution of this problem is spectrum coding to be become before 0 and 1, at amplifier #1855 adjustment frequency spectrum.This processing is sometimes referred to as equilibrium.Balanced adjustment can be carried out on the transmitting terminal of amplifier #1850.In this case, difficult point is, amplifies high frequency with respect to low frequency, makes that it is smooth that signal spectrum becomes when arriving receiving terminal.This is sometimes referred to as " preemphasis ".

5.2.3 cross-talk

Because the increase of transmission level, the signal that physical layer circuit receives generally can run into more cross-talk.If enough strong to the energy of received signal by transmitting line string road, physical layer circuit will be made the reaction as positive received signal when each the transmission so.All state conflict at every turn when this will cause beginning to send, communication process can't be carried out.

The possibility of false conflict requires adjustable traffic volume and minimum incoming level amount are limited.For its reason is described, considers to increase the 3dB transmission level and can make the cross-talk that receiving-member bore of physical layer circuit increase 3dB.Similarly, reducing the minimum incoming level of 3dB, can to make the cross-talk energy be that the level of its actual signal reduces 3dB.Consequently, the threat of cross-talk has increased 6dB.In other words, if the cross-talk energy only disturbs the low 5dB of required minimum than generating in the common 10BaseT system, make above-mentioned 3dB so and adjust the appearance that will cause occurring false conflict.

Aforementioned XL600+ product done a line on send, and simultaneously adjacent lines on the experiment of received signal.The transmission level of this product and standard 10BaseT transmission level approximately equal, but the low 6dB of the minimum incoming level that it uses.Therefore, the big 6dB of problem that faced than common 10BaseT Ethernet of the crosstalk problem of XL600+.But experiment does not show and tangible false conflict occurred.Below be obvious: can all carry out the 3dB adjustment to the transmission level and the minimum incoming level of common 10BaseT hardware, and can not cause false conflict.

Cross-talk also may cause problem because of having reduced the signal to noise ratio on the receiving port.Suppose received signal on a physical layer circuit, be routed to another physical layer circuit, and relevant line on send.In this case, can on a port in the received signal, on other adjacent port, send these signals with less time delay.All be banded in the same cable if be connected to the twisted-pair feeder of these ports, send the right energy of line from 3 so and will go here and there the road, obtain by receiving port.

The XL600+ product is tested, wherein send signal level and still be retained in the 10BaseT standard, and communication is undertaken by 730 feet UTP.(because minimum acceptable received level has reduced 6dB, so extra length can be arranged).Like this, in these experiments, the SNR of receiving port will reduce by 400 feet extra excess-attenuations that the lines transmission is born.According to the standard drawing that shows how energy decays on twisted-pair feeder, in this frequency range, excess-attenuation on average is about 6dB.

How relevant for this experiment is described with common 10baset hub, consider the situation of drive signal by the general hub of long 530 feet circuit.This distance is only long 200 feet than 10BaseT standard, rather than in the experiment of front 400 feet.Therefore, the SNR level in the hub, low 3dB during only than the transmission of the circuit by long 330 feet.If increased transmission level 3dB, so available total SNR degenerates and is about 6dB.According to the experiment of front, this amount still is enough to carry out reliable communication.Therefore, the preferred increment of signal level is 3dB.The explained earlier mistake, the minimizing of minimum incoming level should be identical.

Two additional factors have reduced the influence of cross-talk.A physical proximity that relates to UTP that may cross-talk.Second factor relates to signal jam, the influence of the employed signal jam of for example aforementioned safe hub.

At first, in this system, the UTP cable that is connected to backbone port never bundles with the cable that is connected to other port.Therefore, can not there be the serious cross-talk that relates to signal to carry out backbone port.Unique possibility of cross-talk is to occur between a local port and the another port.

Second factor relates to the Site Port that signal flows out hub.With the similar scheme of the used scheme of aforementioned safe hub in, data-signal generally once only flows out from single Site Port.If especially hub has received packet from backbone port, according to MAC Address, only on Site Port, send bag, other Site Port sends " sky " bag so, make the computer link to each other with other Site Port can this hub of perception just busy, if they send, will clash so.Similarly, if hub receives data-signal on Site Port, on other Site Port, broadcast " sky " signal, data retransmission signal on backbone port so again.

During to unique requirement of these spacing waves, they are enough to show that to the PC that connects transmission carries out.Especially select these spacing waves to make the minimum that influences of cross-talk.

A kind of technology is to eliminate, and promptly filters the upper frequency of spacing wave, increases the energy on the lower frequency.This has significantly reduced cross-talk, because signal cross-talk on high frequency possibly.The elimination of high frequency must still stay enough energy in the sky bag, to trigger the transmission testing mechanism in the remote computer.But this condition satisfies easily, because low cut is less, they provide more energy.This has improved the performance of the deleting mechanism in the online great distance end adapter.

Consider situation now by the legal signal of local port transmission.In this case, the receiving-member of other local port does not need correctly to explain the signal that the circuit end opposite adapter relevant with it sends.They must detect the fact that the computer that is associated is sending.For this reason, the signal deteching circuit of physical layer circuit is more insensitive to the low frequency that less cross-talk occurs.

6 cable networks (Figure 19-28)

6.1 division and termination (Figure 19-20)

In the discussion of the transmission of the signal by UTP 810, the communication of all devices is all undertaken by being connected to transmission line (being UTP) in front.Transmission line can have the point that forms branch.We call " division " to these points.Impedance mismatching has been introduced in division in the transmission line.As the result of impedance mismatching, when signal runs into division, a part of reflected back source point of its energy.This reflection may be disturbed mutually with the clear reception of signal.If the circuit at circuit end points place does not connect, reflection also can occur in the end points of transmission line so.This not clearing end of transmission line can cause reflection because of impedance mismatching equally.Signal reflex occurs in all frequencies to a certain extent.In this system, for example, because possible data degradation or video signal quality worsen, the reflection on data band or the video frequency band high frequency is particularly important.

Some technology are used to improve this high-frequency transmission.These technology comprise

Branch end points place at main transmission line end points place and carrying high frequency technique uses termination

Device;

Use low pass filter to stop high-frequency transmission to branch; And

Use the junction point that high frequency is sent to branch in division place, and reduce on the breakout

Reflection.

Referring to Figure 19, phone 134 and computer 144 are connected to PSTN120 and data hub 815 by UTP 810 respectively.UTP 810 830 has formed the transmission line that does not have branch from " head end " 1900 to wall adapter.Wall socket is positioned at the point 1920 on the circuit.In this simple case, single socket is only arranged on the circuit, therefore, UTP is connected to wall adapter by socket simply.

If adopt the data signaling scheme of a UTP, UTP 810 comprises single UTP so, if perhaps adopt two UTP signalings, UTP 810 comprises two UTP (i.e. 4 lines) so.For example, the 10BaseT signaling should be used two UTP 810, and improved 10Base2 signaling should be used single UTP 810.

In wall adapter 830, the LPF 1930 by the phone frequency range and HPF 1940 by the data band in fact single-point on transmission line are connected.Phone 134 is connected to LPF1930, and computer 144 connects by HPF 1940.Other parts of wall adapter 830 for example connect the medium adapter of HPF and computer, and are not shown.

In the discussion of back, do not transmit vision signal among the UTP 810.Use high pass, rather than band pass filter is connected to transmission line with computer.If video or other high-frequency band signal also appear on the transmission line, band pass filter can use as previously discussed so.

Simple cabling scenario shown in Figure 19 is not general in many buildings.Referring to Figure 20, more general situation relates to division and the branch among the UTP 810.Head end 1900 is connected to a plurality of phones 134 and computer 144.In this example, transmission line is division in point 2032,2034 and 2036, and stops at point 2038.This example shows the Several Methods of handling this branched line network.

A kind of method of handling division is to be electrically connected simply.At point 2032, be connected to lead in the main line by respective wire with branch, form the simple branch 2033 in the circuit.End points in branch 2033, computer 144 and phone 1034 are connected to branch by LPF 1930 and HPF 1940 respectively, as shown in figure 19.

Because do not take the measurement that shows at split point 2032, returned its source point by partial reflection so arrive the high-frequency signal of this split point.For example, in the branch 2033 from the data-signal of computer 144 with the point of arrival 2032, and all be reflected back toward computer, and all on another connection line, send at point 2032.Computer 144 can bear the decay of reflected signal.The signal of head end 1900 receiving attenuations.As long as measure, stop any signal that sends from head end 1900 to be reflected back toward head end, 2032 division can not stop communication so.Such second division will cause this reflection.Therefore, can use maximum this class divisions.

At point 2034, branch 2035 is connected to main line by LPF 2010.By eliminating the high frequency reflection near the place placement low pass filter (LPF) 2010 of this split point.If all adopt this technology at all breakouts along transmission line, so at high frequency treatment, transmission line does not have branch's action as it.But this scheme stops any adapter by being connected to branch in high-frequency band communication.The phone 134 that illustrates is connected to branch 2035.Signal in the phone voice grade arrives head end 1900 by LPF 2010 between these phones.

At point 2036, utilizing junction point 2040 to solve that division is caused may problem, and junction point 2040 is connected to branch 2037, and two parts of the main line of assembling at split point.The impedance of junction point 2040 terminated lines, thus avoid arriving the reflection of the signal of division.Operable dissimilar junction point is described below.Generally speaking, when this junction point was passed through at signal in passive junction point, the about 3dB of this signal decayed.Therefore, exist such restriction, it shows on the path that connects computer and data hub can how many passive junction points, and can not cause the too much decay of signal.

At point 2038, the end points of main line, terminator (or resistor) 2044 is placed on after the HPF2042.The impedance on this terminator matched transmission line road, anti-stop signal goes back along line reflection.

Junction point 6.2 (Figure 21-23)

Split point adopts dissimilar junction points 2040, for example split point among Figure 20 2036.

Referring to Figure 21 a, junction point 2040a is by the LPF separately 2130 on single being electrically connected of putting respective wire in 2120, connects its 3 incoming line 2102a-c junction point 2040a and also 2110 connects incoming lines by high pass filter (HPF) 2140 at high frequency (HF) junction point.The reflection of signal is avoided in the impedance of HF junction point 2110 terminated lines.Can adopt dissimilar HF junction points, as described below.

Referring to Figure 21 b, junction point 2040a can be a passive circuit.Low frequency signal is by inductance 2130, and the latter provides low-pass filtering.High-frequency signal is by electric capacity 2132, and the latter provides high-pass filtering.Value .01uF is the good selection with data band and phone band separation.Electric capacity 2134 has formed the HF junction point that connects high-frequency signal from 3 ports.The value of electric capacity 2134 is 16 ohm.These resistance collaborative works enter and the impedance of outer outbound path with coupling.Can clearly divide the high-frequency signal that arrives from arbitrary path, and continue on other two paths, to export.The energy of each entering signal is than the low 6dB of the signal that flows to this junction point.

Referring to Figure 22 a, optionally HF coupler 2110a uses directional coupler 2210.In this HF coupler, high-frequency signal and transmits between port 2102a and 2102c between port 2102a and 2102b, but does not transmit between port 2102b and 2102c.Directional coupler 2210 terminated line impedances, and signal when the coupler with the about 3db of signal attenuation.

Referring to Figure 22 b, 3 directional couplers 2210 can be with the high-frequency signal between every pair of port of full connected mode connection.This scheme matched impedance, and signal when the HF coupler with the about 6db of signal attenuation.

In Figure 21 a-b and 22a-b, only show single line to (UTP).Because the junction point is made up of passive component, so signal transmits on both direction, this is required by a UTP data signal just.If use two (or more) individual lines to the transmitted in both directions high-frequency signal, for example on adopting aforementioned 3 UTP during the 100Mb/s signaling schemes, every pair is used junction point of equal value.

If for the 10BaseT signaling is used two UTP, each line is to being used for the one-way communication of data band, and then the junction point of particular type needs a kind of different scheme.

The junction point of being made up of Parallel coupled device equipment among Figure 22 a has formed 2 UTP junction points, and wherein each branch can communicate by letter with main line.But, if all need communication between the every pair of port, be the junction point shown in the single UTP system as Figure 22 b, need the distinct device of coupler so.

Referring to Figure 22 c, high frequency junction point 2110c has 3 ports, and each port has two UTP.On each port, two directional couplers, 2210 divisions and be incorporated in addition the signal that comes and goes between two ports.These couplers make that entering UTP on the port goes up the UTP that goes out that the signal that receives is sent in addition each port in two ports.In this way, HP junction point 2110c has formed passive 3 side's hubs effectively, with the 10BaseT signal that sends in the data band of division on two UTP.

Also can use and enliven the junction point.Referring to Figure 23 a, show on each port accept two one-way lines enliven HF junction point 2300.For example, this junction point can be used for using at data band the system of 10BaseT signaling.Amplifier 2310,2312 is used for amplifying high frequency signal.These amplifiers have the input and output impedance on matched transmission line road, thereby avoid reflection.The input and output of amplifier make the signal that enters on the UTP on one of 3 ports be exaggerated, and send on the UTP that goes out of each port in other two ports.

Referring to Figure 23 b, if use single reversible link, use directional coupler 2320 to separate so, make up this both direction then, use and enliven HF junction point 2300 amplifying signals.When this scheme can be used for for example adopting one of improved 10Base2 signaling schemes on aforementioned single UTP.

6.3 connector

According to the present invention, adopt the connector and the wiring unit of particular type, can be easily with the existing line system in equipment and the signal path introducing building.These comprise the method for the speech of attaching troops to a unit, data and video line concentrator, and the dissimilar wall sockets that hold the signal junction point.

6.3.1 connect speech, data and video line concentrator 800 (Figure 24)

Later referring to Fig. 8, in this system schema, speech, data and video line concentrator 800 are installed in the single casing, have 5 industrial standard RJ-21 connectors.Each RJ-21 provides nearly, and 25 UTP connect.The UTP cable 121 that RJ-21 connector is used for comprising 24 UTP is connected to casing.Two connectors are used for connecting 24 from data hub 815 and send and 24 reception UTP cables 802 and 804.The 5th connector is connected to video source 820 with 24 UTP cables 806.A connector is provided to the connection of wiring part 805, hub 800 is connected to 24 UTP cables 806 of UTP network 250.

In some applications, can't find UTP 121 to converge to point 25 pairs of RJ-21 connectors that can be connected to speech, data and video line concentrator 800 from PSTN 120.

Though be not that 25 needle connectors are always arranged, almost always can find UTP 121 to penetrate the point of wiring part.In these cases, increase speech and just other signal in these parts may be easier.

Figure 24 a-d has illustrated a kind of technology of finishing this point.Link 2410 is according to the very popular style design of a kind of being called " 66 ", and specifically the Siemens Company by Westbury Connecticut is numbered 343569 parts embodiment.Figure 24 b institute representation model is made of the row with 50 row.Every row has two junctor meetings, and they are that metal connects.

The twisted-pair feeder that is connected to PSTN 120 can be gone up at first junctor and penetrate two row downwards.These two on the right penetrates chance downwards and is used by the twisted-pair feeder that leads to the user, thereby telephone service is provided.Because telephone signal provides by this way, so the port of the UTP cable 121 general hubs 800 that connect is opened.

Special adapter connects on the top that penetrates chance downwards on every row the right.This provides the 3rd junctor meeting for this row.(common situation that the use of this adapter becomes telephone industry is the section of the having time) is connected to the 3rd from each line of hub 800 to 2412 and penetrates chance downwards, thereby has increased data, video and control signal on thread guide path.

Referring to Figure 24 a, LPF 2420 prevents that high-frequency signal from flowing to PSTN 120.Referring to Figure 24 b, LPF 2420 is made of the single filter that is applied to each UTP 121 circuit.

Referring to Figure 24 c-d, each filter 2420 can be led 2422 and constitutes by being encapsulated in 100uH electricity in the very little plastic casing, and there is a groove centre of each plastic casing, wherein can place 22 or 24 standard copper wires 2410.This shell comprises contact 2450 and 2452, the principle of identity design of the ScotchLock twisted-pair feeder connector of being produced according to the 3M company with Minnesota.After inserting lead, two parts of shell are interlocked.This has formed the connection between lead and contact 2450 and 2452, has inserted effectively with the electricity of circuit polyphone and has led.

Still need to eliminate circuit and lead short circuit on every side to the electricity that connection generated between contact 2450 and 2452.This finishes by the edge of a knife 2430.Because the edge of a knife 2430 residing positions, it can serve as lead on the point between two contacts, eliminated short circuit.

6.3.2 wall socket

Dissimilar wall sockets provides tie point for wall adapter, and the point of cable network division is provided.The TV wired network generally splits in wall socket punishment, thereby can insert these and improve communication to introduce dissimilar junction points.

Referring to Figure 25 a, the sketch plan of wall socket 2500 shows the RJ-11 socket 2532 that connects one or two phone, and the Registered Jack-45 2530 that connects wall adapter (if perhaps do not need wall adapter, then directly connecting computer).Socket 2530 has to the connection of two UTP2502 (4 line), and it leads to the head end of system.It also has to the connection of two UTP 2504 of expansion main line.All signals that receive from UTP 2502 all are sent to UTP2504.

Socket 2500 has the 3rd connection to 4 UTP 2506, is used for the branch of attaching troops to a unit after low pass filter 2520.This branch does not receive high-frequency signal from main line, but is used for phone is connected to system.RJ-11 socket 2532 walks abreast and is connected to UTP 2506, directly connects one or two phone.

Wall socket 2500 has the Registered Jack-45 2530 that is connected to main line by high pass filter 2510.Computer is connected to Registered Jack-45 2530 to carry out data communication.

If socket 2500 is positioned at the end points of transmission line, terminator 2526 can be connected to circuit by the manual switch in the socket 2528 so.

Referring to Figure 25 b, the wiring diagram of socket 2500 shows 3 tie points 2503,2505,2507 that connect UTP 2502,2504 and 2506 respectively.Notice that in Figure 25 b, each circuit has been represented solid wire, but in Figure 25 a, each circuit has been represented a pair of line.HPF 2510 is made up of 4 electric capacity, and LPF 2520 is made up of 4 inductance.

Figure 26 a-b shows second socket.Notice that in Figure 26 a each circuit has been represented two UTP, i.e. 4 lines, but in Figure 26 b, each circuit has been represented solid wire.Two UTP 2602 provide the connection of head end, and two UTP 2604 continue main line, and two UTP2606 are branches.

Referring to Figure 26 a, the low frequency path from UTP 2602 through LPF 2620 and 2522 to UTP2604, the continuation of main line.Another low frequency path from through LPF 2620 and 2624 to UTP2606, branch.RJ-11 socket 2630 also connects on the low frequency path, and phone is connected to wall socket.

If what does not insert in the Registered Jack-45 630, switch 2628 closures so, the high frequency path through HPF 2610, switch 2628, HPF 2612, is arrived UTP2604 from UTP 2602 then.

Registered Jack-45 2630 comprises two jockeys, and each device is connected to each side of switch 2628.If equipment inserts Registered Jack-45 2630, switch 2628 is opened so, and the equipment that inserts Registered Jack-45 might this switch of cross-over connection.

If equipment is connected to Registered Jack-45, the high frequency path is by HPF 2610, then by one of jockey in the Registered Jack-45 2630.Computer can be connected to Registered Jack-45 2630 in this way.

Other jockey from Registered Jack-45 2630 also has the high frequency path to UTP 2604.Therefore, insert the high frequency path that the equipment of Registered Jack-45 2630 might " cross-over connection " switch 2628 be disconnected.

In addition, provide the 4th of socket 2600 to connect 2608.This connection can be used to be provided to the high-frequency signal of the UTP of branch 2606.The use of these two attributes is described below.

Referring to Figure 26 b, show the realization of the wall adapter 2600 that adopts one pole low pass and high pass filter, each filter comprises single electric capacity or inductance on every line.

Another attribute of this socket relates to RJ-11 socket 2630.Only there are 4 to be used for telephone line in available 6 connectors.Additional connection 2633 is connected to the RJ-11 connector.This connection be used for connection 2634 that phone is connected the connection of both sides of one of the inductance of LPF 2622 be provided.Because the DC electric current generally is from PSTN 120 flow through UTP 2602 and the low frequency path by inductance, so the voltage that connects between 2634 and 2633 is used for determining whether socket is correctly installed, and perhaps whether port 2602 and 2604 is put upside down.

Referring to Figure 26 c, interface #2680 can insert RH-45 socket #2630, to be provided to being connected of computer and top setting box.In interface #2630, LPF 2650 is by data band, blocked video frequency range.In the preferred allocation of frequency, the transition band of this filter is from 13MHz to 15MHz.HPF 2652 passes through video-frequency band.Data-signal flows to HF junction point #2670, for example passive 10baset hub, and the latter provides the connection #2672 of computer.Data-signal also returns a LFP#2650 by HF junction point #2670 through Registered Jack-45.Different vision signals can be passed through the right HPF 2652 of each line.A signal divides in directional coupler 2660, and offers top setting box by UTP 2662.In this way, high-frequency band can be split into different signals, thus video and control signal in the difference process data signal.

Referring to Figure 27, the use example of the socket 2600 shown in Figure 26 a-b utilizes Registered Jack-45 2630 to connect active 4 port one 0BaseT hubs 2700.Hub 2700 is connected to UTP 2602 by its port 2702 through Registered Jack-45 2630.Hub 2700 is connected to UTP 2604 by second port 2704, provides communication service to continue main line.Notice that HPF 2710 is included in the connection between hub 2700 and the Registered Jack-45 2630, disturb hub to block telephone-band signals.By its connection through Registered Jack-45 2630, hub 2700 serve as the socket 2600 of flowing through the 10BaseT signal enliven repeater.

Then, computer 144 can be connected to hub 2700, with the compunication that is connected to UTP 2602 or UTP 2604.

The additional port 2706 of hub 2700 is used for providing data communication services to branch 2606 alternatively.Especially port 2706 is connected in the point 2608 of socket.The telephone-band signals that HPF 2720 blocks from grouping 2606.

At last, still referring to Figure 27, computer 144 is alternatively at the data-signal by data hub 2700 be connected between the telephone plant of UTP 2602,2604 and 2606 gateway service is provided.An example of this gateway service is " Internet telephony " service, and wherein call can be carried out routing addressing by data network 122 rather than PSTN 120.Computer 144 has the phone connection 2750 to Registered Jack-45 2630, makes the telephone-band signals path arrive UTP 2602,2604 and 2606 through Registered Jack-45.

6.3.3 intermediary's wire-bonded point

Later, in specific buildings, pass through intermediary's distribution interface 520, be called intermediary's delivery frame (IDF) to the wiring of each unit referring to Fig. 5.These intermediary's distribution interface provide high-frequency signal can be connected to the point of discrete cell.For example, the data hub can be positioned at each intermediary's interface.A reason that the hub top is positioned at this position is to reduce the distance between hub and the computer.

Figure 28 shows electric equipment and the connector that is positioned at intermediary's distribution interface.The vision signal that is sent to main distribution interface 200 upwards flows to IDF 520.The front was carried, and vision signal sends by single UTP, and each UTP provides the user of a line telephone service to this line end.Control signal then in the opposite direction flows.In IDF, the 10BaseT signal is added lambda line centering, consistent with vision signal.Provide special connector to help connection processing, thereby reduced cost.

The key of IDF is link 2850 and outer cover 2855.Link 2850 comprises 4 row " 110 " twisted-pair feeder connectors.Every row comprise 50 row.Because twisted-pair feeder needs two connectors, so 25 twisted-pair feeders can be connected to each row altogether.

Between first and second rows of contacts, and groove 2810 is arranged between third and fourth rows of contacts.There are 50 contacts on each limit of this groove.Be electrically connected to 110 connectors on its left side in each contact on the groove left side.Also there is same syndeton the contact on groove the right.

Under the normal condition, the counter-contact mutual extrusion on the groove the right and the left side, on the right of being established to and the electricity between the connector on the left side lead connection.But the purpose of this groove is to make printed circuit board (PCB) be inserted.This plate can be designed to insert this groove under specified pressure, thereby cuts off the connection between the contact.This plate also can have the electric contact of accurate coupling, and there are 50 contacts on the right of each groove and the left side, is electrically connected thereby set up.When inserting this PC plate, signal can flow to the secondary series of connector from first row of connector under the control fully of electronic device on this plate.An example of parts 150 is U.S. Westbury, the parts ST-9877 of the Siemens Company of Connecticut.

Outer cover 2855 is made by the PC panel material, and profile is similar to the rectangular box of having lacked one side.Therefore, 4 limits have been generated.Two size and the groove in the link 110 in these 4 limits are identical, can resemble to insert foregoing.In addition, the hard contact on these limits also as mentioned above, and is corresponding with the contact on the groove the right and the left side.Electronic component is settled in these contacts on outer cover 2855, keep metal to be connected with whole 200 connectors of parts 2850.Therefore, can on outer cover 2855, settle electronic component and electrical path, to realize many different signal processing and exchange.

Another group line is to also assembling at parts 2850.They are right from the line of 10baset hub 2860 to RJ-21 connectors 2858 on outer cover 2855.

A port of hub 2860 is exclusively used in each among 12 users that are connected to parts 2850.Outer cover 2855 guiding path that powers on has been finished routing addressing between hub 2860 and parts 2850 upper contacts, and it is right wherein to connect other line that is exclusively used in same user.Outer cover 2855 comprises data-signal is sent to line by each unit to required electronic equipment from hub 2860.

7 exemplary embodiments

An exemplary embodiment of native system provides the distribution of the signal in the multi-story structure of cabling scenario shown in Figure 5.Main information interface 200 can be arranged in building, and intermediary's distribution interface 520 is positioned at every layer service element UTP network 400 of this layer.

In this example, the distance between main information interface 200 and at least some the intermediary's distribution interface 520 can be greater than 330 feet, the scope of standard 10BaseT signaling.

7.1.1 signal distribution

Referring to Figure 29 a, in such an embodiment, each unit UTP network 400a links to each other with two UTP by circuit, and one of them provides telephone service for this unit.Unit UTP network 400a has branched structure.Junction point and terminator are incorporated in the socket, to reduce reflection.

Multiple unit UTP network 400a, for example those UTP networks on the building individual layer provide service by the distribution interface 520a of intermediary.The distribution interface 520a of intermediary comprises speech, video and data hub 2950, and the latter provides multiplexing signal to each unit on two UTP 2906.

For each unit, speech, video and data hub 2950 are connected to a UTP 2902 who phone and vision signal is sent to this unit.Because the distance between main information interface 200a and the intermediary's distribution interface 520 needs separately data-signal to be distributed to each intermediary's distribution interface.

In intermediary's distribution interface 520,10baset hub 2940 is connected to speech, video and the data hub 2950 that data-signal is provided, and these signals send this unit to by UTP 2906.10baset hub 2940 is safe hubs as shown in figure 17.Therefore, the computer in unit in can not another unit of interception computer and the data network address between the data that transmit.

Main information interface 200a comprises video source 820 that is connected to television distribution system 124 and the 10BaseT data hub 815 that is connected to data network 122.A UTP 121 provides TV service for each unit.Speech and video line concentrator 2910 are connected to video source 820 with each UTP 2902.

Data hub 815 is connected to corresponding medium transducer 2930 among the distribution interface 520a of intermediary by medium transducer 2920.The medium transducer to converting two-way signaling to, sends each 10BaseT UTP to each distribution interface 520a of intermediary by single UTP 2904.In this case, the medium transducer has structure shown in Figure 12, wherein sends tone signal and is used for collision detection.

Referring to Figure 29 b, speech and video line concentrator 2910 comprise the transducer 2912 in each unit.Each transducer 2912 comprises a LPF 2914 who only passes through the phone frequency range.Each transducer 2912 also is provided to the connection of video source 2912.

Speech and video line concentrator 2910 comprise the transducer 2952 in each unit.UTP 2902 is connected to respective transducer 2912 in speech and the video line concentrator 2910 with transducer 2952.This UTP is connected among two UTP 2906 one by LPF 2954 and HPF 2956, and LPF 2954 is by DC and phone frequency range, and HPF 2956 passes through video frequency band.This UTP2906 is also connected among two UTP 2951, and the latter is connected to corresponding port or data hub 2940 with transducer 2952.Other UTP 2951 that is derived from data hub 2951 is connected to another among two UTP 2906.

Unit UTP network 400a comprises the transmission path of being made up of two UTP.A UTP transmits phone and data-signal, and the 10BaseT data-signal of a direction, and other UTP transmits the 10BaseT signal of other direction.Transmission path has formed the branch of socket 2960.Therefore, socket 2960 comprises the high frequency junction point of being made up of two parallel directional couplers, and these two couplers are connected high-frequency data and vision signal leading in socket 2964 and 2962 two branches.Socket 2964 and 2962 comprises that terminator is to reduce the reflection of high-frequency signal.

Standard 10BaseT adapter in the computer 114 is connected to socket 2960 by two UTP, and these two UTP are through only being provided to the connection of UTP2906 by two band pass filters of frequency ranges of data.Phone 134 is connected to one of UTP 2906 through the low pass filter by the phone frequency range.TV 154 is connected to one of UTP through socket 2964, and the latter is through leading to and high pass filter by the band of controlling frequency range and video frequency band respectively.

In operation, pass through UTP 2906, data hub 2940 and data hub 815 from the data communication of computer 144, with reading of data net 122.Data hub 2940 provides fail safe in the following manner: data that send to other unit sending computer 144 not do not send the data of the addressing computer 144 that arrives from data network 122 to other unit.

TV 154 (and respective remote control) passes through video, speech and data hub 2950 with video source 820, and speech is communicated by letter with video line concentrator 2910.

TV 134 is by video, speech and data hub 2950, and speech is communicated by letter with PSTN 120 with video line concentrator 2910.

7.1.2 video selector

Referring to Figure 30 a, in the exemplary embodiment, video source 820 comprises video selector 930.Video selector 930 comprises one group of video source program 3014, and the vision signal that the latter generates can send to each unit, and switch 3012 is connected to video converter 920 with suitable source program, and vision signal is sent to each unit.This scheme makes the quantity of video source program to lack than the unit that this video selector is served.

Video source controller 3010 receives control signal from each Video Controller 920.According to these control signals, video source controller 3010 is selected the unit of a video source program 3014 with matching request, and command switch 3012 is connected to video selector with the source program of selecting.

Can adopt various video source program.In this illustrative example, each source program 3014 comprises video tuner 3024 and " WebTV " 3022, shown in Figure 30 b.Tuner 3024 is selected available specific program according to the common signal that receives from video source controller 3010 from television distribution net 124.Video source controller also control switch 3020 is selected between video source 3024 and WebTV3022.

WebTV is a kind of equipment that is connected to data network 122, provides audio frequency and video output according to the content that exists in the data network 122.WebTV is by the browser control of using mouse for example or keyboard.Referring to Figure 30 c, in such an embodiment, top setting box 832 and receives the control input not only from Long-distance Control 834 from IR keyboard 3040 and IR mouse 3042.These signals are connected to video source controller 3010 by IR receiver 1062b and controlled adjuster 1060.Video source controller 3010 is given WebTV with the input transfer of keyboard 3040 and mouse 3042.

A plurality of WebTV 3022 are connected to data hub 3030, and the latter is connected to data network with WebTV.Be connected to the server computer 3022 in addition of data hub.Server computer 3022 can provide some services, and these services can be by the user in the unit by the WebTV interface accessing.

The optional embodiment of 8 native systems

The optional embodiment of native system comprises the various combination of above-mentioned element.

For example, a plurality of computers in each unit can use in the system of 10BaseT interface communication, and each socket uses the passive coupler shown in Figure 22 c.This makes that the computer be connected to socket can be simultaneously and data network, and other compunication in this unit, and this communication can be upstream or downstream.

The information service of other type can be incorporated in the system of aforementioned type.For example, satellite TV system can provide TV programme, rather than cable television system.

Other element of the present invention also can independently use.For example, safe hub can be applied to be different from other environment by the twisted-pair feeder simple communication.Power and data-signal are common also very useful to being distributed to hub or other interface by single line.

Also can use the hub or the data hub of other type to replace aforementioned hub.For example, can use " exchange " hub, wherein signal only sends to the port that computer connected that is addressed.Also can use the interface of other type of data network.

Although more than described the direct connection of public telephone network, but, native system also can be connected to private branch exchange (PBX), and from the angle of telephone service is provided for the one group of phone that is connected to cable network, aforementioned private branch exchange provides the PSTN function of equal valuely.

Claims (16)

1. communication system that between a plurality of terminal equipments and multiple information service, communicates by twisted-pair wire net, aforementioned terminals equipment comprises one or more phones, and the aforementioned information service comprises telephone exchange and out of Memory service, and this system comprises

Be connected to the main information interface of information service;

Be connected to the twisted-pair wire net of terminal equipment and main information interface, comprise that a plurality of to enliven telephone wire right, be used between telephone exchange and one or more phone, transmitting voice signal;

Wherein this information interface is included in and enlivens the circuit of telephone wire to the following signal of last combination: a) telephone signal in the phone frequency range that transmits between telephone exchange and one or more phone, and b) be positioned at the high-frequency signal of higher frequency band, this frequency range is higher than the phone frequency range of the information that transmits between out of Memory service and one or more terminal equipment.

2. according to the communication system of claim 1, wherein the out of Memory service comprises data network, and a plurality of terminal equipments comprise computer, and wherein main information interface also comprises the data hub, is used for transmission information between computer and data network.

3. according to the communication system of claim 2, wherein the out of Memory service also comprises the television distribution service.

4. according to the communication system of claim 2, wherein twisted-pair wire net comprises many cables that are connected to main information interface and terminal equipment, these cables form the individual path from main information interface to terminal equipment, cable network comprises the junction point on the cable branch point, in order to reduce the degradation of signals on the high-frequency band.

5. according to the system of claim 1, wherein a plurality of terminal equipments comprise television receiver and relevant remote control equipment, main information interface comprises a video selector, it is connected to one of information service, comprise receiver and transmitter, receiver is accepted the control information that remote control equipment sends in high-frequency band by twisted-pair wire net, and transmitter provides TV signal to television receiver by twisted-pair wire net in response to control information on high-frequency band.

6. according to the system of claim 5, wherein video selector comprises a tuner of selecting television broadcasting.

7. according to the system of claim 6, wherein video selector comprises the computer that is connected to data network, and control information comprises the information of identification data net source of video information.

8. according to the communication system of claim 1, also comprise secure circuit, be used to prevent that the information that transmits is sent to another terminal equipment between terminal equipment and information service.

9. system according to Claim 8, wherein a plurality of information services comprise data network, secure circuit comprises a data hub, its a plurality of ports are connected to terminal equipment, a port is connected to data network, this data hub comprises such circuit, and this circuit is used to prevent to be connected to the data that receive on the port of terminal equipment and is sent to the port that is connected to other terminal equipment.

10. according to the system of claim 9, wherein hub also comprises such circuit, and this circuit is used to prevent to be connected to the data that are addressed to certain terminal equipment that receive on the port of data network and is sent to the port that is different from the port that terminal equipment connected that is addressed.

11., also comprise the circuit of minimizing by the degradation of signals of cable network transmission according to the system of claim 1.

12. according to the system of claim 11, the circuit that wherein reduces degradation of signals comprises the circuit of amplifying signal, and the circuit of equalizing signal.

13. system according to claim 11, wherein a plurality of information services comprise data network, this system also comprises a data hub, be connected to cable network by a plurality of ports, the circuit that reduces the degradation of signals that transmits by cable network also comprise reduce the circuit that is connected to a plurality of ports between the circuit of cross-talk.

14. system according to claim 1, also comprise the medium transducer, wherein the medium transducer is connected to information service by multiple conducting wires, and be connected to cable network by the lead of lesser amt, the medium transducer comprises by multiple conducting wires and receives information from information service, and this information sent to the circuit of cable network by the lead of lesser amt.

15. according to the system of claim 14, wherein the medium transducer will become to send to a line to last signal to the 10BaseT conversion of signals that receives by two lines.

16. a method that communicates between a plurality of terminal equipments and multiple information service by twisted-pair wire net, aforementioned terminals equipment comprises one or more phones, and the aforementioned information service comprises telephone exchange and out of Memory service, and this method comprises

Twisted-pair wire net by link information service and terminal equipment enliven telephone wire to transmitting the voice signal between telephone exchange and the one or more phone;

Enliven telephone wire on the combination following signal: a) telephone signal in the phone frequency range that between telephone exchange and one or more phone, transmits, and b) be positioned at the high-frequency signal of higher frequency band, this frequency range is higher than the phone frequency range of the information that transmits between out of Memory service and one or more terminal equipment.

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