CN101132284A

CN101132284A - Internet communication device

Info

Publication number: CN101132284A
Application number: CNA2006100200304A
Authority: CN
Inventors: 何自强
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-23
Filing date: 2006-08-23
Publication date: 2008-02-27

Abstract

This invention relates to a network communication device including: a channel redundant module containing: 1, a first I/O port connecting to a first communication facility, 2, a second I/O port connecting to a second communicatin facility, 3, a third I/O port used in connecting to a terminal redundant device at the other end of a a network line composed of 4 pairs of twisted-pairs, which is connected with a first terminal device and a second terminal device, 4, a redundant circuit connected to the first, second and the third I/O port seprately to form an Ethernet channel and a high speed out-of-band channel on the line, in which, said first communication facility communicates with the first terminal device via the Ethernet channel and the second communication facility communicates with the second terminal device via said out-of-band chanel.

Description

Network communication device

Technical field

The present invention relates to network communication device, mainly be applicable to the local area network (LAN) of in same local area network wiring system, realizing the communication of Dual-switch double-channel.

Background technology

At present, carrying out voice call communication on Ethernet (Ethernet) is by adopting VoIP (Voiceover IP) technology, also claiming IP (Internet Protocol) telephony to realize.The private branch exchange PBX traditional with independent use (Private Brach Exchange) carries out telephone communication and compares, utilize Ethernet (Ethernet) to carry out data and telephone communication has many good qualities, as reduce system building and maintenance cost, and provide the various function and applications more integrated with voice-and-data.

But, carry out on the Ethernet telephone communication technology and the operation on also have some problems so far.This is very high to network service quality QoS (Quality of Service) requirement because transmit voice, and Ethernet is to grow up under the background of the packet that QoS can not be provided (Packet or Frame) switching technology.Here, QoS refers to communication network at bandwidth (Bandwidth), and packet postpones (PacketDelay), the technical indicator of data package jitter (Packet jittering) and data-bag lost aspects such as (Packet Loss).In addition, Ethernet is aspect the reliability and fail safe of system, also not as good as traditional PBX system.

Therefore, solve Ethernet Phone communication in technology and the existing problem of operating aspect, will be helpful to the application of further popularization Ethernet Phone voice communication.

In order to understand the present invention better, ethernet technology and its correlation technique are described at first further.

Ethernet is a kind of LAN (Local Area Network) LAN (Local AreaNetwork) technology of being invented in nineteen seventies, so that the data communication between personal computer and other data terminal equipment to be provided.Because the simplicity and the system expandability of ethernet technology, it has been the major technique that is used to realize LAN (Local Area Network) in the world now, and formed international standard by U.S. electronic motor Ssociety of engineers IEEE (The Institute ofElectrical and Electronics Engineers), promptly ieee standard 802.3: have and bump many equipment of carrier sense cut-in method and the physical layer standard (Carrier sensemultiple access with collision detection (CSMA/CD) access method andphysical layer specifications) that the building detects.

According to ieee standard 802.3, one by 8 core leads or 4 pairs of straight through cables that twisted-pair feeder is formed, and as the 5th class (Category 5) or similar netting twine, provide the transmission channel of a full duplex, connect two ethernet devices, as a computer and an Ethernet switch.Usually, the two ends of such netting twine respectively are furnished with one 8 core RJ45 connector, interconnect with 8 core RJ45 sockets of the network port of ethernet device.In this article, 8 core leads of a netting twine represent that by from 1 to 8 order correspondingly, 4 pairs of twisted-pair feeders of netting twine are expressed as twisted-pair feeder 1-2 respectively, twisted-pair feeder 3-6, twisted-pair feeder 4-5 and twisted-pair feeder 7-8.10Base-T or 100Base-TX (below be referred to as 10/100Base-T) EtherChannel uses two pairs of double cross lines right, and promptly twisted-pair feeder 1-2 and twisted-pair feeder 3-6 transmit the too netting index number of it is believed that with differential mode, and other two pairs of twisted-pair feeders are on the shelf; The EtherChannel of the gigabit rate of a 1000Base-T uses whole 4 pairs of double cross lines right.

Early stage Ethernet is that the bus public affairs are enjoyed formula, be that a plurality of terminal equipments (as personal computer) are connected on the netting twine simultaneously, adopt many equipment of the carrier sense access way CSMA/CD (Carrier Sense Multiple Access with CollisionDetection) that bumps the building detection having of ieee standard 802.3 defineds to carry out data communication.The efficient and the reliability of this communication mode are lower.At present, mainly use Ethernet switch to connect a terminal equipment, obtain the reliability of higher rate of data signalling and raising network in star-like point-to-point mode.

" Power over Ethernet (PoE) ", promptly utilize the netting twine of Ethernet to power to terminal equipment (as the IP phone phone), it is an important development of ethernet technology, its major advantage is that independent feed cable wiring and the alternating voltage cancelled to power terminal equipment become the conversion adapter of direct voltage, thereby further improves the reliability of Ethernet.In fact, " Power over Ethernet " becomes the another one standard of IEEE, i.e. 802.3af by standardization.

According to ieee standard 802.3af, a Power-over-Ethernet equipment PSE (Power SourcingEquipment) provides " common mode " netting twine voltage (Inline Power) of direct current or low-frequency ac to a network-termination device with two pairs of twisted-pair feeders of mode A (" Alternative A ") or mode B (" Alternative B ") mistake netting twine.Under mode A, twisted-pair feeder is used to transmit netting twine voltage to 1-2 and 3-6, its polarity of voltage depend on netting twine be through-type (Straight-Through, or MDI) still (Cross-Over or MDI-X) of chiasma type.As previously mentioned, twisted-pair feeder also is used to transmit the Ethernet data signal in the mode of difference simultaneously to 1-2 and 3-6, so under mode A, Ethernet data signal and netting twine voltage are transmitted on two twisted-pair feeder 1-2 and 3-6 simultaneously and transmit.This shows that mode A both had been applicable to 10/100Base-T, also be applicable to 1000Base-T.Under mode B, twisted-pair feeder 4-5 and 7-8 only are used to transmit PoE netting twine voltage, and its polarity of voltage is fixed, and twisted-pair feeder 4-5 is a positive polarity, and twisted-pair feeder 7-8 is a negative polarity.This shows that mode B is only applicable to 10/100Base-T.

Ieee standard 802.3af has stipulated that the execution mode of two kinds of power supply unit PSE is terminal point formula (Endpoint) PSE and mid-span formula (Midspan) PSE.Terminal point formula PSE and an Ethernet switch are installed in the cabinet jointly, by same RJ45 interface data-signal and netting twine voltage are coupled on the netting twine and transmit; Mid-span formula PSE is an autonomous device, is connected between an Ethernet switch and the terminal equipment, each circuit-switched data signal of its netting twine voltage that provides and this Ethernet switch of being received is coupled on separately the netting twine transmits.

According to ieee standard 802.3af, a terminal equipment PD (PoweredDevice) who accepts the PoE power supply, as IP phone, must while support pattern A and these two kinds of PoE supply power modes of mode B.

Say that technically in order to be implemented in the communication of the enterprising lang sound of Ethernet, an IP phone forms the ethernet ip packet with the analog voice signal digitlization, loads in the Ethernet data bag, is sent to another IP phone through Ethernet.As previously mentioned, Ethernet need provide enough good QoS, just can obtain gratifying telephone communication quality.

At present, there are two kinds of technology that are widely used for carrying out on the Ethernet IP phone communication, make Ethernet switch that the ability of the certain QoS of providing both had been provided, also have better fail safe simultaneously.The first is according to priority classified to the Ethernet data bag, and other just comes transfer data packets to Ethernet switch according to the Ethernet data packet priority.For example, give high priority, any packet that is associated with the IP phone machine can be transmitted as soon as possible for packet from the IP phone machine.Its two technology that is to use virtual LAN VLAN (VirtualLAN), will be in an Ethernet switch from the packet of IP phone machine and from other data terminal, as the packet of computer in the network second layer (Layer 2), be that data link layer (Data LinkLayer) is separated, to improve the fail safe of IP phone communication.In fact, these two kinds of technology have also formed a standard, i.e. ieee standard 802.1p/Q. by IEEE

Though, use Ethernet switch can allow Ethernet that the ability of the certain QoS of providing is provided with priority and functionality of vlan, the fail safe that improves Ethernet is simultaneously carried out IP phone communication to be supported in better on the Ethernet.Even so, still there are some problems in such Ethernet in technology and operating aspect, has to be solved or improvement.These problems comprise:

1) problem of reliability and fail safe.On certain meaning, say, on an Ethernet, carry out data and voice communication simultaneously and be equivalent to two eggs are placed in the one basket.In case when this Ethernet can not normally move even paralyse because of any reason, data and telephone communication can lose simultaneously.

The problem of 2) voice communication confidentiality.Transmit though adopt VLAN the packet of voice and other packet can be separated among two VLAN,, prevent that phone from being had certain help by eavesdropping the confidentiality of voice communication.But, this still possible by " illegal invasion ", so the degree of isolation of its right packet is limited based on data link layer (Data Link Layer) VLAN.

3) problem of network upgrade.In order to support IP phone communication, need with more advanced, the Ethernet switch with QoS/VLAN function is replaced traditional Ethernet switch.Do the increase of the expense that not only causes the network construction like this, the more important thing is that in the process of network upgrade, the network operation tends to instability even interruption, has a strong impact on daily data and telephone communication.

4) network management and safeguard the problem of aspect.The Ethernet switch that use has a QoS/VLAN function can produce network management and safeguard the problem of aspect.This is because the setting of new Ethernet switch is more complicated and consuming time than being provided with of traditional Ethernet switch, needs the network maintenance staff of specialty manually to be provided with under a lot of situations.In addition, in the running of network, the running status and the performance that also need professional network maintenance staff to come monitoring network.These factors cause the stealthy expense that continues.

5) problem of 119 Emergency Calls such as grade.In a traditional telephone exchange PBX system, the telephone number of a phone is based on the port of the telephone exchange PBX that this telephone set is connected to and sets.And in an IP telephony system, the telephone number of an IP phone machine is based on the physical address (MAC Address) of this IP phone machine and sets.Therefore, same IP phone machine can be connected to different ethernet switch ports and its telephone number is constant.This causes the function that the location difficulty of IP phone machine is difficult to support 119 Emergency Calls.

Summary of the invention

An object of the present invention is to provide a kind of network communication device, it is by simple, economic and effective local area network technology, with solve with improve above-mentioned Ethernet on IP phone communicate by letter existing problem and difficulty.

The object of the present invention is achieved like this: a kind of network communication device comprises: channel multiple connection module, and this channel multiple connection module has:

1) one first input and output I/O port is used to connect one first communication equipment;

2) one the 2nd I/O port is used to connect a second communication equipment;

3) one the 3rd I/O port is used for connecting a terminal multiple devices that is positioned at the described netting twine other end by the netting twine of 4 pairs of twisted-pair feeders, and described terminal multiple devices also connects one first terminal installation and one second terminal installation;

4) multiplex circuit connects the described the first, the second and the 3rd I/O port respectively and form an EtherChannel and a hyper tape outer channel on described netting twine;

Described first communication equipment is communicated by letter with described first terminal installation by described EtherChannel, described second communication equipment is communicated by letter with described second terminal installation by described outband channel, and the two paths of data signal is isolated mutually.

And described first and second communication equipments are Ethernet switch respectively, and described first terminal installation is a personal computer, and described second terminal installation is the IP phone machine.

And described network communication device also comprises a Power-over-Ethernet equipment PSE, and the netting twine voltage of its output is coupled on 2 pairs of twisted-pair feeders in the described netting twine, is described second terminal installation power supply.

And, have a polarity of voltage adjustment and coupling circuit, the variable netting twine voltage of the polarity of voltage of outside input is coupled on 2 pairs of twisted-pair feeders in the described netting twine with the polarity of voltage of ieee standard 802.3 defineds, be described second terminal installation power supply.

And described EtherChannel uses 2 pairs of twisted-pair feeders of ieee standard 802.3 regulations in the described netting twine to transmit its data-signal in the 10/100Base-T mode; Described outband channel uses 2 pairs of twisted-pair feeders on the shelf in the described netting twine to transmit its data-signal in the 10/100Base-T mode.

And described network communication device also comprises an Ethernet switch, as described second communication equipment, is installed in the same cabinet.

And described network communication device also comprises two Ethernet switches, as described first and second communication equipments, is installed in the same cabinet respectively.

And described Ethernet switch as second communication equipment receives only and transmits packet from a legal terminal device by described outband channel, is used to realize the access control of terminal installation and the function of location.

And described EtherChannel uses 4 pairs of twisted-pair feeders of described netting twine to transmit the Ethernet data signal; Described outband channel is data-signal outside interframe time out (Inter-framePeriods) conveyer belt that described Ethernet data signal transmits.

And described Ethernet data signal meets the requirement of gigabit rate Ethernet 1000Base-T, uses scrambler bit (Bit) Sd among the 1000BASE-T _n[2] and/or bit Sd _n[3] the outer data-signal of conveyer belt, wherein, bit Sd _n[2] and Sd _n[3] meet the definition of ieee standard 803.2.

And, use following formula will be with outer data-signal to load on bit Sd _n[2] and/or Sd _n[3] in:

Here, OOB_D _nExpression is by the outband channel data after handling through a kind of coding method; "! "

It is the logical operator of " non-"; Other symbol meets the definition of ieee standard 803.2.

And described coding method is the mB/nB coding, comprises the 4B/5B coding.Here, m and n are positive integer, and m is less than n.

Advantage of the present invention is: 1. mutually isolate on local area network (LAN) of computer data signal and IP phone data-signal and independent operating makes IP phone communication that well good QoS and reliability be arranged.2. has good voice communication confidentiality.3. need not to change Ethernet switch, in the process of network upgrade, network still can normally move.4. be convenient to network management and maintenance, reduced network management and maintenance cost.5. support the positioning requirements of 119 emergency calls such as grade.6. can use an attached Ethernet (Auxiliary LAN) that outband channel constitutes control plane (platform) (Control Plane), realize of the access control of various terminal equipments master ethernet as the master ethernet (Primary LAN) that EtherChannel constituted.

Description of drawings

Fig. 1 is according to a system block diagram based on the local area network (LAN) of Dual-switch double-channel communication of the present invention.

Fig. 2 A is a kind of embodiment block diagram according to network multiple devices MUX_SW of the present invention.This network multiple devices MUX_SW comprises a PoE Power-over-Ethernet equipment PSE.

Fig. 2 B is the more detailed circuit diagram of channel multiple connection module 200 among Fig. 2 A.

Fig. 3 A is the another kind of embodiment block diagram according to network multiple devices MUX_SW of the present invention.This network multiple devices MUX_SW does not comprise PoE Power-over-Ethernet equipment PSEP, only accepts the netting twine voltage of outside input.

Fig. 3 B is the more detailed circuit diagram of channel multiple connection module 300 among Fig. 3 A.

Fig. 4 is a block diagram according to another embodiment of the invention.Network multiple devices MUX_SW shown in Ethernet switch and Fig. 2 A is installed in the cabinet.

Fig. 5 is the block diagram of an alternative embodiment of the invention.Network multiple devices MUX_SW shown in two Ethernet switches and Fig. 2 A is installed in the cabinet.

Fig. 6 is the block diagram of the middle Physical Coding Sublayer PCS (Physical Coding Sub-layer) of gigabit rate Ethernet 1000Base-T physical layer (PHY) of a simplification.

Fig. 7 is scrambler bit Sd used according to the invention _n[2] or/and bit Sd _n[3] come the block diagram of conveyer belt outer channel data.

Fig. 8 is the flow chart that is used for realization terminal equipment access control (AccessControl) of second communication equipment and location (Location Tracking) according to of the present invention.

Embodiment

With reference to Fig. 1～Fig. 8, the invention will be further described below with reference to embodiment.

With reference to Fig. 1, network multiple devices MUX_SW 110 comprises one or more channel multiple connection modules.Each channel multiple connection module has three input and output (Input/Output) I/O port.First input and output I/O port, (Patch Cable) is connected in one first LAN switch by wire jumper 105; The 2nd I/O port is connected in one second LAN switch by wire jumper 115; The 3rd I/O port, be used for straight through cable 125 by 4 pairs of twisted-pair feeders, the terminal multiple devices MUX_EP 140 of the netting twine other end as described in connection is positioned at as the 5th class netting twine (Category 5), this terminal multiple devices MUX_EP 140 can connect one first terminal equipment respectively, as computer 150 and one second terminal equipment, as IP phone machine 160; This channel multiple connection module and the corresponding multiple devices MUX_EP 140 that is positioned at terminal equipment one side produce one (Ethernet Channel) on same netting twine 125, be used for sending and receiving a described I/O port data signal and an outband channel (Out-of-Band Channel), be used to send and receive the 2nd corresponding I/O port data signal.Especially, this outband channel is a kind of high-speed transmission channel, can transmit one or more digital speech and/or vision signal.Usually, the transmission code check of one road high-quality audio digital signals is 64Kbps (Kilo-bits per second), and behind its formation IP packet, required channel code rate can be higher.Especially, if carry out face-to-face communication by IP phone, required channel code rate will be much higher.

So, first LAN switch 120 is as the packet of a data switch (Data Switch) by EtherChannel transmission and switching computer 150, computer 150 is used to move the application program of non-quality of service sensitivity (Non-QoS Critical), as transmitting Email and data file etc.Simultaneously, second LAN switch 130 is as the packet of a voice exchange (Voice Switch) by the terminal equipment of the application program of outband channel transmission and exchange IP phone machine 160 or other operation quality of service sensitivity (QoS Critical).

The present invention is by setting up two channels at same netting twine, and adopt the mode of two independent LAN switch, make the transmission and the forwarding of the data-signal of the transmission of data-signal of IP phone 160 and forwarding and computer 150, keep apart mutually, therefore, IP phone communication has better QoS, reliability and confidentiality.According to the present invention, the isolation that this data-signal transmits should realization between the physical layer (Physical Layer) of network or physical layer and data link layer (Data Link Layer).

First and second LAN switch all can be suitable Ethernet switches.Especially, second LAN switch 130 can be one and not have QoS and functionality of vlan, and the Ethernet switch of non-management (Unmanaged) is to reduce system cost.

Second LAN switch 130 also can be based on the switch of other data packet switching, as asynchronous transfer mode ATM (Asynchronous Trans fer Mode) switch.

In addition, first and second LAN switch also can be more in general sense network communication equipment or device that packet is handled.

In this paper the following description, replace first LAN switch 120 with data switching exchane; Replace second LAN switch with exchange of speech 130 machines.

Voice exchange 130 and network multiple devices MUX_SW 110 can be integrated in same cabinet, become an equipment; Further, data switching exchane 120, voice exchange 130 and network multiple devices MUX_SW110 can be integrated in same cabinet, become an equipment.

Can dispose the port (UplinkPort) that is used for devices interconnect, port one 80 as shown in Figure 1 and port one 70 at data switching exchane 120 and voice exchange 130.The port of such devices interconnect can be used for connecting different network communication equipments and server (SERVERS).

With reference to Fig. 2 A, network multiple devices MUX SW 110 comprises built-in " Power overEthernet " Power-over-Ethernet equipment PSE 280 and an one or more channel multiple connection module 200.Number is relevant with the number of the connectivity port of the switch that is connected really for channel multiple connection module 200, and typical channel multiple connection number of modules comprises 12,16 and 24.Channel multiple connection module 200 has three I/O ports, first I/O port is connected with an I/O port of data switching exchane 120 by wire jumper 105 (Patch Cable), second I/O port connects with one of voice exchange 130 corresponding I/O port by wire jumper 115, and the 3rd I/O port connects by the corresponding I/O port of netting twine 125 with the terminal multiple devices MUX EP140 of the netting twine other end.In this inventive embodiments, channel multiple connection module 200 uses 2 couples of twisted-pair feeder 1-2 of a netting twine 125 and twisted-pair feeder 3-6 to set up EtherChannel, transmits one road 10/100Base-T signal; Use the other 2 couples of twisted-pair feeder 4-5 and the twisted-pair feeder 7-8 of same netting twine 125 to set up outband channel, transmit one road 10/100Base-T signal, and the PoE netting twine voltage 290 of Power-over-Ethernet equipment PSE 280 output transmits by the 2 couples of twisted-pair feeder 4-5 and the formed circuit of twisted-pair feeder 7-8 of netting twine 125 also.

With reference to Fig. 2 B, 3 I/O ports of channel multiple connection module 200 use 3 RJ45 sockets 210,220 and 230 respectively.The RJ45 socket has 8 metal pins, is used for being connected with 8 core RJ45 connectors of netting twine.The function of channel multiple connection module 200 is that the 2 couples of twisted-pair feeder 1-2 and the twisted-pair feeder 3-6 that the 10/100Base-T signal that 2 couples of twisted-pair feeder 1-2 and twisted-pair feeder 3-6 transmitted with wire jumper 105 is coupled to netting twine 125 correspondences goes up and transmit, and also will be coupled at the 10/100Base-T signal that 2 couples of twisted-pair feeders 1-2 and 3-6 transmitted of wire jumper 115 on other 2 couples of twisted-pair feeder 4-5 of netting twine 125 and the 7-8 and transmits.In addition, 2 couples of twisted-pair feeder 4-5 of netting twine 125 and twisted-pair feeder 7-8 form a common-mode voltage transmission circuit, receive and transmission from the output netting twine voltage 290 of Power-over-Ethernet equipment PSE 280.

Particularly, the pin one of RJ45 socket 210,2,3 and 6 pin ones corresponding with RJ45 socket 230,2,3 are connected the pin 4,5 of RJ45 socket 210 with 6,7 and 8 can unsettledly not connect, and so, the twisted-pair feeder 1-2 of netting twine 125 and 3-6 are used to send the signal from the 10/100Base-T of wire jumper 105.The pin one of RJ45 socket 220 is connected with first coil two ends of Signal Spacing transformer 240 (Isolation Transformer) with 2, and the pin 4 of RJ45 socket 230 is connected with second coil two ends of Signal Spacing transformer 240 with 5; The pin 3 of RJ45 socket 220 is connected with first coil two ends of Signal Spacing transformer 250 with 6, and the pin 7 of RJ45 socket 230 is connected with second coil two ends of Signal Spacing transformer 250 with 8.In addition, the positive ends of the netting twine voltage output 290 of Power-over-Ethernet equipment PSE 280+and the negative polarity end-be connected respectively to the centre tap 245 (CenterTap) of Signal Spacing transformer 240 second coils and the centre tap 255 of Signal Spacing transformer 250 second coils, the netting twine voltage 290 of Power-over-Ethernet equipment PSE 280 outputs is coupled to the twisted-pair feeder 4-5 and the twisted-pair feeder 7-8 of netting twine 125.So, the twisted-pair feeder 4-5 of netting twine 125 and 7-8 are used to send simultaneously the netting twine voltage 290 that is provided from the 10/100Base-T of wire jumper 115 signal and Power-over-Ethernet equipment PSE 280.

With reference to Fig. 3 A, this network multiple devices MUX_SW 110 does not comprise a PoE netting twine voltage that the Power-over-Ethernet equipment PSE of PoE netting twine voltage is provided and only accepts outside input, promptly is input to the PoE netting twine voltage of network multiple devices MUX_SW 110 from the 2nd I/O port via wire jumper 115.Shown in Fig. 3 B, network multiple devices MUX_SW110 is made up of one or more channel multiple connection modules 300.

With reference to Fig. 3 B, channel multiple connection module 300 is coupled to wire jumper 105 and wire jumper 115 contained 10/100Base-T ethernet signals respectively in the mode identical with the channel multiple connection module 200 shown in Fig. 2 B on 4 pairs of twisted-pair feeders of netting twine 125 and transmits.On the other hand, channel multiple connection module 300 is accepted from wire jumper 115 with mode A or/and the PoE netting twine voltage of mode B transmission is gone up transmission with its twisted-pair feeder 4-5 and 7-8 that is coupled to netting twine 125.The netting twine voltage of wire jumper 115 can be provided by the PSE of terminal point formula (Endpoint) PSE or mid-span formula (Midspan).Because the type of wire jumper 115 can be through-type (StraightThrough) or chiasma type (Cross-Over), this will cause importing the polarity difference of netting twine voltage.In this embodiment, adopt a polarity of voltage adjustment and coupling circuit, no matter wire jumper 115 is to be loaded with mode A, mode B or be loaded with mode A simultaneously and the netting twine voltage of mode B, all one of them netting twine voltage can be coupled to the twisted-pair feeder 4-5 and the twisted-pair feeder 7-8 of netting twine 125, with fixing correct polarity transmission, promptly twisted-pair feeder 4-5 is the positive ends of PoE netting twine voltage, and twisted-pair feeder 7-8 is the negative polarity end of PoE netting twine voltage.

Particularly, the pin one of

RJ45 socket

310,2,3 and 6 pin ones corresponding with

RJ45 socket

330,2,3 are connected the

4,5 of RJ45 socket 310 with 6,7 and 8 can unsettledly not connect, and so, the twisted-pair feeder 1-2 of netting twine 125 and 3-6 are used to send the signal from the 10/100Base-T of wire jumper 105.The

4,5 and the

7,8 of RJ45 socket 320 connect together respectively, are connected with the centre tap 345 of transformer 340 and the centre tap 355 of transformer 350 respectively again.So, the PoE netting twine voltage of the contained mode B of the twisted-pair feeder 4-5 of wire jumper 115 and 7-8 just is connected to the twisted-pair feeder 4-5 and the 7-8 of netting twine 125 via the pin of RJ45 socket 330 correspondences.

In addition, another centre tap 347 of transformer 340 and another centre tap 357 of transformer 350 are connected to the input that the polarity of voltage of being made up of diode (Diode) is adjusted circuit 360, and its output is connected with the centre tap 345 of transformer 340 and the centre tap 355 of transformer 350 respectively.The polarity of voltage of the PoE netting twine voltage of the mode A that the twisted-pair feeder 1-2 of 360 pairs of wire jumpers 115 of this polarity of voltage adjustment circuit and 3-6 are contained is adjusted accordingly, with correct polarity of voltage it is coupled on the twisted-pair feeder 4-5 and 7-8 of netting twine 125.When wire jumper 115 was loaded with the PoE netting twine voltage of mode A and mode B simultaneously, it was indispensable that this polarity of voltage is adjusted circuit 360.Not so, the netting twine voltage of mode A and mode B is by short circuit.In the present embodiment, when wire jumper 115 is loaded with the PoE netting twine voltage of mode A and mode B simultaneously, because polarity of voltage is adjusted the unidirectional of the electric current of diode in the circuit 360, have only the PoE voltage of the contained mode B of wire jumper 115 to be coupled on the twisted-pair feeder 4-5 and 7-8 of netting twine 125.

Fig. 2 A, 2B, the RJ45 socket shown in 3A and the 3B also can replace with the socket of other type according to concrete performance.For example, in that the network multiple devices MUX_SW 110 shown in Fig. 2 A and 2B is made under the situation of a jumper wire board (Patch Panel), can replace RJ45 socket 230 with IDC (InsulationDisplacement Contact) connector of 8 cores.

The other end of netting twine 125 is terminal multiple devices MUX_EPs 140 corresponding with channel multiple connection module 200 or channel multiple connection module 300.Terminal multiple devices MUX_EP 140 is divided into independent two-way circuit with two-way 10/100Base-T signal and the PoE netting twine voltage that netting twine 125 is transmitted, and is drawn by wire jumper respectively.A wire jumper is loaded with the 10/100Base-T signal of netting twine 105, links with computer 150; Another road wire jumper is loaded with the 10/100Base-T signal of netting twine 115, and the PoE netting twine voltage that is provided from switch one side also is provided simultaneously, links with IP phone machine 160, to 160 power supplies of IP phone machine.

With reference to Fig. 4, an Ethernet switch 430 integrates in the channel multiple connection module and the Power-over-Ethernet equipment PSE 480 of a group shown in Fig. 2 B with functional equivalent, is installed in the same cabinet.Adopt such equipment, can set up the local area network (LAN) of a Dual-switch, and realize higher device integration with existing Ethernet switch as data switching exchane.On function, Ethernet switch 430 is equal to voice exchange shown in Figure 1 130.Particularly, RJ45 socket 410 is by wire jumper 105 and external ethernet switch, and promptly data switching exchane 120 is connected; RJ45 socket 460 is connected with the terminal multiple devices MUX-EP 140 that is positioned at terminal equipment one side by netting twine 125.The pin one of the correspondence of RJ45 socket 410 and RJ45 socket 460,2,3 and 6 couple together respectively, and the twisted-pair feeder 1-2 and the 3-6 of the correspondence of the twisted-pair feeder 1-2 of wire jumper 105 and 3-6 and netting twine 125 are coupled together.So, outside data switching exchane 120 intercoms with computer 150 with 3-6 mutually by the twisted-pair feeder 1-2 of wire jumper 105 and netting twine 125.The port 432 of built-in Ethernet switch 430 adopt data link layers (Data Link Layer) with media independent interface MII (Media Independent Interface), device PHY 420 is connected with an ethernet physical layer (Physical Layer).The transmitter of PHY 420 (Transmitter) is coupled to its output signal on the pin 4-5 of RJ45 socket 460 by an isolating transformer 425; The receiver of PHY 420 (Receiver) receives the input signal from the pin 7-8 of RJ45 socket 460 by 435 couplings of another isolating transformer.So, built-in Ethernet switch 430 intercoms with IP phone machine 160 with 7-8 mutually by the twisted-pair feeder 4-5 of netting twine 125.On the other hand, two links of the voltage output end mouth 452 of Power-over-Ethernet equipment PSE 480 are connected with the centre tap of transformer 425 with transformer 435 respectively, PoE netting twine voltage 452 is loaded on the twisted-pair feeder 4-5 and 7-8 of netting twine 125, is 160 power supplies of IP phone machine.

The MII port 434 of built-in ethernet switch 430 is connected with PHY 445 and corresponding Signal Spacing transformer, and becomes 430 1 Extended Capabilities Port of built-in ethernet switch (Up-Link Port) by RJ45 socket 470.Port 434 also can use GMII (Gigabit MII) or other similar data link layer (Data Link Layer) interface.

The RJ45460 socket also can replace with the socket of other type according to concrete performance.For example, when equipment that will be is as shown in Figure 4 made the jumper wire board (Patch Panel) with Dual-Ethernet of Power-over-Ethernet equipment PSE, can replace RJ45 socket 460 with IDC (the Insulation Displacement Contact) connector of 8 cores.

With reference to Fig. 5, this embodiment is installed in same cabinet on the basis of embodiment shown in Figure 4 another Ethernet switch 570 as data switching exchane is also integrated, and further improves the integrated level of equipment.The port 572 of Ethernet switch 570 adopts relevant interface MDI with media (MediaDependent Interface) with 574, can directly be connected with the pin of RJ45 socket 460 with RJ45 socket 580.Here, RJ45 socket 580 provides and has been used for a too Extended Capabilities Port of network switch 570.Other parts circuit shown in Figure 5 is the same with the circuit of Fig. 4, repeats no more.

With reference to Fig. 6, data scrambler 620 (Data Scrambler) receives the random number SC of one 8 bit of scrambler bit generator 610 (Scrambler Bit Generator) output _n[7:0] 615 is to GMII (the Gigabit Media Independent Interface) data of 8 bits, TXD _n[7:0] 605 carries out scrambler and handles, the data Sd of one 9 bit of output _n[8:0] 625, its algorithm is seen ieee standard 802.3.According to ieee standard 802.3 table 40-1 and table 40-2, the data Sd of this 9 bit _n[8:0] 625 is by 5 grades of sign map and polarity scrambler 630 (Quinary Symbols Mapping﹠amp; Sign Scrambler) processing is mapped to 5 grades of symbol (TA _n, TB _n, TC _n, TD _n).These 5 grades of symbol (TA _n, TB _n, TC _n, TD _n) with 4 bit random data Sg of scrambler bit generator 610 _n[3:0] 635 carries out the scrambler operation, forms 5 grades of symbol (A that do not contain direct current DC component _n, B _n, C _n, D _n) 645.

According to ieee standard 802.3, signal loc_rcvr_status 655 is a binary signal (OK or NOT OK), represents the local reception state of this physical layer device PHY.This two-value status signal is by bit Sd _n[2] be sent to far-end physical layer device PHY, the bit Sd of this far-end physical layer device PHY to receiving _n[2] carry out descrambling code (Descrambling) operation, extract this signal simultaneously, be expressed as rem_rcvr_status.

In addition, according to ieee standard 802.3, signal tx_mode 665 also is used to scrambler bit generator 610 and produces 8 bit random number SC as an input signal _n[7:0] 615.Signal tx_mode 665 inserts sublayer PMA (Physical Medium Attachment Sublayer) by physical medium and produces, and its signal comprises three numerical value, SEND_N, SEND_I and SEND_Z, the transmission mode of expression Physical Coding Sublayer PCS.When tx_mode=SEND_N, its Physical Coding Sublayer PCS works in the normal transmission pattern, i.e. data signal, control signal and 5 grades of symbol (A _n, B _n, C _n, D _n) in idle symbol (IDLESymbols); When tx_mode=SEND_I, its Physical Coding Sublayer PCS only transmits idle symbol, and the Physical Coding Sublayer PCS in order to the training far-end makes the Physical Coding Sublayer PCS of far-end enter the normal transmission pattern.

Relatively, according to the algorithm of ieee standard 802.3 defineds, bit Sd _n[2] and bit Sd _n[3] produce according to following formula:

Here, the logical operation of " ^ " expression XOR (Exclusive OR).N represents the data sample sequence number, corresponding to the sampled moment of data.Logical relation (tx_enable _N-2=1) expression have that the Ethernet data bag is transmitted during, otherwise, expression do not have that the Ethernet data bag is transmitted during.

Especially, under the normal transmission pattern when tx_mode=SEND_N, non-packet be transmitted during be called as interframe time out (Inter-Frame Period).By formula (1) as can be seen, at the interframe time out, bit Sd _n[2] be still variation, but except the status signal loc_rcvr_status of a two-value, it does not transmit any other information, and the signal loc_rcvr_status=OK of this moment, does not change; By formula (3) as can be seen, at the interframe time out, bit Sd _n[3] be still variation, but it does not transmit any other information; From another angle, according to ieee standard 802.3, at the interframe time out, different Sd _n[2] or Sd _n[3] cause different idle symbols, and these different idle symbols itself do not transmit any information.The present invention utilizes this specific character to realize the outer data-signal of conveyer belt just and does not influence the transmission of original ethernet signal simultaneously.According to one embodiment of present invention, the outer data-signal of band loads on corresponding bit Sd according to formula given below _n[2] or bit Sd _n[3] be transmitted:

Here, "! " expression non-(NOT) logical operation.OOB_D _nBe illustrated in the outer data-signal of band of n constantly.Especially, during tx_mode=SEND_N, OOB_D _nBe that it had both comprised original status signal loc_rcvr_status, had also comprised the data-signal of original outband channel to the original outband channel data bit stream that (Encode) back produces of suitably encoding.

According to one embodiment of present invention, use the coding schedule of a 4B/5B shown in the table 1, the grandfather tape outer channel data of 4 bits are carried out the 4B/5B coding, make the code character (Code-Group) of 5 bits behind the coding both comprise the outband channel data, also comprised the accepting state loc_rcvr_status of original local physical layer device PHY.The code character of 5 bits behind the coding becomes bit stream through parallel/serial conversion, as OOB_D _nAnd by Sd _n[2] be sent to the recipient.

According to table 1, at the interframe time out of EtherChannel, the 5B code character that the outband channel data of any one 4 bit are converted into a correspondence transmits; When not having the outband channel data, a special IDEL code character " 11111 " is transmitted.In addition, also need regularly to transmit by code character/I/ and/ code character that J/ forms is right, its effect is to set up code character border (Code-GroupBoundaries) in bit stream coded (Bit Stream), is used for decoding (Decoding) process of receiving terminal.

By the coding schedule shown in the table 1 as can be seen, do not having under the normal condition of error code, form the coding after out of band signal data code flow OOB_D _nIn zero bit more than 3 can not appear continuously.According to this encoding characteristics, receiving terminal can be from received out of band signal data code flow OOB_D _nIn extract signal loc_revr_status from transmitting terminal, as the signal rem_revr_status. of receiving terminal in other words, as long as at received out of band signal data code flow OOB_D _nIn the zero bit of discontinuous appearance more than 3, rem_rcvr_status=OK; Not so, rem_rcvr_status=NOT OK.

Table 1:4B/5B coding schedule

The code character code name	Title	The 5B code character	The 4B sign indicating number	Loc_rcvr_status
The code character code name	Title	The 5B code character	The 4B sign indicating number	Loc_rcvr_status		0	Data#0	11110	0000	OK
1	Data#1	01001	0001	OK		0	Data#0	11110	0000	OK
1	Data#1	01001	0001	OK	2	Data#2	10100	0010	OK
3	Data#3	10101	0011	OK	2	Data#2	10100	0010	OK
3	Data#3	10101	0011	OK	4	Data#4	01010	0100	OK
5	Data#5	01011	0101	OK	4	Data#4	01010	0100	OK
5	Data#5	01011	0101	OK	6	Data#6	01110	0110	OK
7	Data#7	01111	0111	OK	6	Data#6	01110	0110	OK
7	Data#7	01111	0111	OK	8	Data#8	10010	1000	OK
9	Data#9	10011	1001	OK	8	Data#8	10010	1000	OK
9	Data#9	10011	1001	OK	A	Data#A	10110	1010	OK
B	Data#B	10111	1011	OK	A	Data#A	10110	1010	OK
B	Data#B	10111	1011	OK	C	Data#C	11010	1100	OK
D	Data#D	11011	1101	OK	C	Data#C	11010	1100	OK
D	Data#D	11011	1101	OK	E	Data#E	11100	1110	OK
F	Data#F	11101	1111	OK	E	Data#E	11100	1110	OK
F	Data#F	11101	1111	OK	I	IDLE	11111	Undefined	OK
J	SSD#	1	11000	Undefined	I	IDLE	11111	Undefined	OK	OK
J	SSD#	1	11000	Undefined	K	SSD#	2	10001	Undefined	OK	OK
V	Invalid code character	Other code character	Undefined	NOT?OK	K	SSD#	2	10001	Undefined		OK

4B/5B coded system shown in the table 1 also can be used for the digital coding of grandfather tape outer channel is formed OOB_D _n, the data OOB_D behind the coding _nPass through scrambler bit Sd according to formula (4) _n[3] be transmitted.But, by bit Sd _n[3] the outer data of conveyer belt need not be considered to transmit and acknowledge(ment) signal Loc_rcvr_status.

As can be seen, when not having out of band signal to be transmitted, formula (3) and (4) are equal to formula (1) and (2) respectively.Like this, according to formula (3) or/and the physical layer device that (4) are realized outside being not used in conveyer belt during data-signal, with the physical layer device compatibility of the 1000Base-T of a standard.

Usually, also can use other mB/nB coded system, the 8B/10B coding is encoded to the outband channel data, forms OOB_D _nHere, here, m and n are positive integer, and m is less than n.

With reference to Fig. 7, it is a block diagram according to formula (3), further specifies and how to utilize bit Sd _n[2] come conveyer belt outer channel data.The 4B/5B encoder of module 740 is with the outer data input of the grandfather tape of 4 bits OOB_IN _n675 are encoded into the data of 5 bits; Again by parallel/serial conversion, become serial data temporarily to deposit in the first in first out of module 740 (FIFO) memory the data transaction of each 5 bit; Serial data OOB_D from FIFO output _n685 are input to the data scrambler 720 after the improvement.Data scrambler 720 after the improvement also accepts to comprise data-signal TXD simultaneously _nThe random number SC of [7:0] 605,8 bits _n[7:0] 615, signal loc_rcvr_status 655 and signal tx_mode 665, the outer data OOB_D of the band after will encoding according to formula (3) _n685 load on bit Sd _n[2].Remove bit Sd _n[2] other 8 scrambler bits, i.e. Sd outside _n[8:3] and Sd _n[1:0] still produces according to the mode of ieee standard 802.3 defineds.

Similar ground, block diagram shown in Figure 7 also can be used for utilizing bit Sd _n[3] come conveyer belt outer channel data, just signal loc_rcvr_status no longer works.Specifically, the serial data OOB_D that exports from the FIFO coding _n685 are input to the data scrambler 720 after the improvement.Data scrambler 720 after the improvement also accepts to comprise data-signal TXD simultaneously _nThe random number SC of [7:0] 605,8 bits _n[7:0] 615 and signal tx_mode 665, the outer data OOB_Dn 685 of the band after will encoding according to formula (4) loads on bit Sd _n[3].Remove bit Sd _n[3] other 8 scrambler bits, i.e. Sd outside _n[8:4] and Sd _n[2:0] still produces according to the mode of ieee standard 802.3 defineds.

Further, bit Sdn[2] and bit Sdn[3] can be used for the outer data-signal of conveyer belt simultaneously, to obtain the transfer rate of the outer data of band faster.

According to ieee standard 802.3, GMII data TXD _nThe frequency of the transmission clock of [7:0] is 125MHz.Accordingly, use bit Sd separately _n[2] or Sd _n[3] come the code check of conveyer belt outer channel data to be: 125Mbpsx 0.8=100Mbps, this is the maximal rate that can reach.Here, coefficient 0.8 is the code efficiency of 4B/5B coding.Correspondingly can calculate, when the continuous transmission of 1000Base-T data-signal time out between with minimum frame has extreme length Ethernet data bag (1522 byte), the transmission code check of the outband channel that can reach is about 778Kbps, and this is the minimum code rate that can reach.If use bit Sd simultaneously _n[2] and Sd _nWhen [23] coming conveyer belt outer channel data, transmitting code check can correspondingly increase.

The outband channel that forms generally is lower than 100Kbps because transmit the needed code check of one tunnel IP phone voice, so can transmit at least one road voice signal like this; Also can transmit video, realize face-to-face communication, as the IP video telephone.

In brief, according to formula (3) and (4) and Fig. 7, the bandwidth of " leaving unused " is come the outer data-signal of conveyer belt when using the 1000Base-T signal.

With reference to Fig. 8, the flow process of shown flow chart is made up of the following step:

Step 810: port of voice exchange and the link that a terminal equipment is connected be activated (LinkUp).

Step 820: receive first good packet? in this way, go step 830; As not being the continuation wait.A good packet refers to and does not have error code, the packet of data integrity.

Step 830: check whether the source physical address (Source MAC Address) of this packet belongs to the source physical address of the equipment of being allowed.In this way, go step 850; As not being to go step 840.

Step 840: refusal sends this packet, returns step 820.

Step 850: voice exchange sends this packet according to the target physical address (Destination MACAddress) of this packet from corresponding port, simultaneously, the source physical address REF SA of this packet is remembered as becoming unique source physical address that this port allows.Go step 860.

Step 860: received packet? in this way, go step 870; As not being the continuation wait.

Step 870: is the packet that receives from same terminal equipment? in this way, go step 890; As not being to go step 880;

Step 880: refuse this packet, return step 860.

Step 890: voice exchange sends this packet according to the target physical address (Destination MACAddress) of this packet from corresponding port, return step 860.

This flow process has realized the access control to terminal equipment, simultaneously, it also makes a port of voice exchange receive only and transmit from a terminal equipment of being allowed, as the packet of an IP phone machine, with the relation one to one between the port numbers of setting up terminal equipment physical address and voice exchange.According to this relation one to one, can locate the IP phone machine.

In addition, voice exchange is used for the address database of physical address coupling, both can be the local data base that is positioned on the voice exchange, also can be the remote data storehouse that is arranged on server of network.

Local area network (LAN) based on double-channel communication according to the present invention is not limited only to IP phone communication, and it also can have other application.For example, can use an attached Ethernet (Auxiliary LAN) that outband channel constitutes control plane (ControlPlane), realize of the access control of various terminal equipments master ethernet as the master ethernet (Primary LAN) that EtherChannel constituted.

Claims

1. network communication device, it is characterized in that: comprise channel multiple connection module, this channel multiple connection module comprises:

2) one the 2nd I/O port is used to connect a second communication equipment;

Described first communication equipment is communicated by letter with described first terminal installation by described EtherChannel, and described second communication equipment is communicated by letter with described second terminal installation by described outband channel, thereby makes the two paths of data signal isolate mutually.

2. network communication device according to claim 1 is characterized in that: described first and second communication equipments are Ethernet switch respectively, and described first terminal installation is a personal computer, and described second terminal installation is the IP phone machine.

3. network communication device according to claim 1 and 2, it is characterized in that: described network communication device also comprises a Power-over-Ethernet equipment PSE, the netting twine voltage of its output is coupled on 2 pairs of twisted-pair feeders in the described netting twine, is described second terminal installation power supply.

4. network communication device according to claim 1 and 2, it is characterized in that: have a polarity of voltage adjustment and coupling circuit, the variable netting twine voltage of the polarity of voltage of outside input is coupled on 2 pairs of twisted-pair feeders in the described netting twine with the polarity of voltage of ieee standard 802.3 defineds, is described second terminal installation power supply.

5. network communication device according to claim 1 is characterized in that: described EtherChannel uses 2 pairs of twisted-pair feeders of ieee standard 802.3 regulations in the described netting twine to transmit its data-signal in the 10/100Base-T mode; Described outband channel uses 2 pairs of twisted-pair feeders on the shelf in the described netting twine to transmit its data-signal in the 10/100Base-T mode.

6. network communication device according to claim 1 is characterized in that: described network communication device also comprises an Ethernet switch, as described second communication equipment, is installed in the same cabinet.

7. network communication device according to claim 1 is characterized in that: described network communication device also comprises two Ethernet switches, as described first and second communication equipments, is installed in the same cabinet respectively.

8. network communication device according to claim 1, it is characterized in that: described second communication equipment is a switch, receive only and transmit packet by described outband channel, be used to realize the access control of terminal installation and the function of location from a legal terminal device.

9. network communication device according to claim 1 and 2 is characterized in that: described EtherChannel uses 4 pairs of twisted-pair feeders of described netting twine to transmit the Ethernet data signal; Described outband channel is data-signal outside the interframe time out conveyer belt that described Ethernet data signal transmits.

10. network communication device according to claim 9 is characterized in that: described Ethernet data signal meets the requirement of gigabit rate Ethernet 1000Base-T, uses scrambler bit (Bit) Sd among the 1000BASE-T _n[2] and/or bit Sd _n[3] the outer data-signal of conveyer belt, wherein, bit Sd _n[2] and Sd _n[3] meet the definition of ieee standard 803.2.

11. network communication device according to claim 10 is characterized in that: use following formula will be with outer data-signal to load on bit Sd _n[2] and/or Sd _n[3] in:

Here, OOB_D _nExpression is by the outband channel data after handling through a kind of coding method; "! " be the logical operator of " non-"; Other symbol meets the definition of ieee standard 803.2.

12. network communication device according to claim 11 is characterized in that: described coding method is the mB/nB coding, comprises the 4B/5B coding.Here, m and n are positive integer, and m is less than n.