CN202183824U

CN202183824U - CATV entry adapter

Info

Publication number: CN202183824U
Application number: CN201120085511XU
Authority: CN
Inventors: G·F·哈利克; C·T·威尔斯; J·M·小埃根; C·F·纽比
Original assignee: PPC Broadband Inc
Current assignee: PPC Broadband Inc
Priority date: 2010-02-12
Filing date: 2011-02-12
Publication date: 2012-04-04
Anticipated expiration: 2021-02-12

Abstract

The utility model relates to a CATV entry adapter. The cable television (CATV) entry adapter is connected with a CATV network and serves as a concentrator in a Multimedia over Coax Alliance (MoCA) network. MoCA signals are transmitted between the passive port and the active port of the entry adapter through a pair of directional couplers. The pair of directional couplers allows communication to be carried out between the MoCA enabled embedded multimedia adapter (eMTA) of the passive port and an MoCA network multimedia adapter that is connected to the active port.

Description

The CATV couple in adapter

Cross reference to related application

The application be that from here some identical inventors submitted on October 21st, 2008, be entitled as the part continuation application that " Multi-Port Entry Adapter; Hub and Method for Interfacing a CATV Network and a MoCA Network ", sequence number are the invention described in 12/255,008 the U.S. Patent application.Be that the invention of describing in 12/255,008 the U.S. Patent application is transferred its assignee at sequence number.

Technical field

The present invention relates to community and insert TV or cable television (cable television, CATV) network and relate to coaxial cable multimedia alliance (MoCA) (in-home) entertainment network of being in.More particularly; The present invention relates to a kind of novelty with the improvement CATV couple in adapter (entry adapter); This couple in adapter has conducted to source port with active (active) CATV signal; Passive (passive) CATV signal is conducted to passive port, and in other improve, this couple in adapter uses directional coupler passive and conduction MoCA signal between the source port arranged.

Background technology

Catv network uses the infrastructure of coaxial cable, signal splitter and combiner, relay amplifier, filter, main line, cable breakout, branch line and other signal conduction devices of interconnection high frequency " downstream " signal to be provided and it is distributed to CATV subscriber's guard station (family and office) from the main signal dispensing mechanism that is called as " head end ".The subscriber device of downstream signal operation such as television set, telephone set and computer.In addition, most of catv network also sends back " upper reaches " signal the head end of catv network from subscriber device.For example, the subscriber uses STB to select to be presented at the program on the television set.As another example, when use was connected to the personal computer of public internet through CATV infrastructure, two-way communication was absolutely necessary.As another example, voice-over ip (VOIP) telephone set uses CATV infrastructure and public internet as the communication media that is used for two way telephone conversation.

Transmit when allowing upstream and downstream CATV signal and in order to allow the interoperability of the subscriber device and the equipment related with catv network infrastructure of outside, subscriber guard station, downstream are limited in two different frequency bands with stream signal.In most of catv network, downstream frequency band is positioned at the scope of 54-1002 megahertz (MHz), and upstream frequency band is positioned at the scope of 5-42MHz.

Downstream signal is located to be delivered to the subscriber guard station from catv network infrastructure at CATV couple in adapter (it also is called as access device, terminal adapter or branch (drop) amplifier usually).Couple in adapter is a multi-port device, and it is connected at the access interface place from the CATV breakout cable of catv network infrastructure and its and is connected to coaxial cable in many other dispensing ports, and this coaxial cable extends through the subscriber guard station and arrives the cable outlet.Each cable outlet can be used for being connected to subscriber device.Typically, owing in different rooms, possibly use dissimilar subscriber devices, therefore most of family has the coaxial cable that extends to the cable outlet in each room almost.For example, in the many different room of family or office, use television set, computer and telephone set usually.A plurality of dispensing ports of couple in adapter are delivered to the outlet of each cable with downstream signal and stream signal are transmitted to the breakout cable of CATV infrastructure from subscriber device through couple in adapter.

Except that television set, computer and phone, can use a large amount of relatively other amusements and multimedia device in the family.For example, digital VTR (DVR) is used for broadcast program, still photo and mobile picture record at storage medium, thereby can be in this content of on display or television set, resetting of the later time that the user selects.As another example, also on display or television set, play computer game.This computer game can be those recreation that obtain at the medium that those recreation that obtain from catv network on the internet are perhaps play from the playback reproducer that is connected to display or television set.As another example, can distribute in the family and watch or listen to being used to from the signal of the receiver of satellite broadcast signal.The device of these types comprises the more traditional television set, telephone set and the device that are connected to the internet through catv network, is commonly referred to as multimedia device.

At home or a plurality of diverse locations in the subscriber guard station use the expectation of multimedia devices to cause the establishment of coaxial cable multimedia alliance (MoCA).MoCA has developed product specification with establishment be used to the to interconnect entertainment network of being in of the at present known and following multimedia device.The MoCA network of being in uses and to be initially dispensing CATV signal in the subscriber guard station and the subscriber guard station of setting up or the coaxial cable infrastructure of being in, mainly be because this coaxial cable infrastructure has been present in most of family and can CBR CATV frequency band in the much more information of loaded information.Through MoCA is enabled or the MoCA interface arrangement be connected the cable exit in the room of subscriber guard station, set up the MoCA network.These MoCA interface arrangements are realized MoCA communication protocol, and its signal that will be used by multimedia device usually is encapsulated in the MoCA signal packets and is being connected transmission MoCA signal packets between other MoCA interface arrangements in other cable exits subsequently.Receive the MoCA interface arrangement removes encapsulation from the MoCA signal packets multi-media signal; And multi-media signal is delivered to display, computer or other multimedia devices that connected, and content is presented to the user from said display, computer or other multimedia devices.

The device that each MoCA enables can be in or the MoCA network of subscriber guard station in the device that enables of each other MoCA communicate by letter with at home or send content of multimedia in the subscriber guard station everywhere.Can obtain to show, play or be used on the device that the different Mo CA at diverse location place that can be at home from the content of multimedia of a multimedia device enables, thereby avoid being repositioned onto another position the subscriber guard station from a position at the multimedia device of physically will making a start with other forms.Content of multimedia is considered to be useful through the aspect that more fully utilizes the multimedia device that exists in the Modern Family that is delivered in of MoCA network.

Because the operation of the MoCA network of subscriber guard station must be carried out with the operation of CATV service simultaneously, therefore, the utilization of MoCA signal is different from the frequency range of the frequency range of CATV upstream and downstream signal.Typical MoCA frequency band is 1125-1525MHz.

Except traditional cable television service, the telephone service that is called " lifeline telephone service " also can be used for many CATV subscribers.In case of emergency, even between the turnoff time of subscriber guard station, lifeline telephone service still works.Embedded multimedia terminal adapter (eMTA) device that comprises cable modem and telephone adapter is used to receive telephone service.Usually use the voice-over ip (VOIP) that transmits by CATV upstream and downstream signal to realize telephone service.Owing to hope that telephone service is available between the turnoff time of subscriber guard station; Therefore the CATV couple in adapter that is suitable for using with the eMTA device has passive port; Passive CATV upstream and downstream signal conducts to this passive port, and need not amplified or other adjustings by active electronic component.Therefore, the outage in the subscriber guard station can influence sharply and go to and from the transmission of the passive CATV signal of passive port.

Except passive port, the CATV couple in adapter has the CATV downstream signal of amplification usually and they is conducted to a plurality of active signal communication paths that source port is arranged of CATV couple in adapter.The subscriber device that is connected to source port is benefited from the amplification of CATV downstream signal usually.Yet the outage of couple in adapter influences the active signal that is transmitted to and conducts own source port through the parts of the inoperative consumed power that when cutting off the power supply, becomes unfriendly.The transmission of active C ATV signal is by grievous injury or become impossible under outage condition.

At present, to be used for the eMTA device of passive CATV signal transmission be not (MoCA-enabled) that MoCA enables to great majority.Yet the eMTA device that MoCA enables is considered to help enlarging the quantity of multimedia device in the MoCA network.For example, the multipoint teleconference media apparatus such as additional telephone set and answering machine can provide telephone service alternately and in whole subscriber guard station with the eMTA device that MoCA enables.For the eMTA device that multimedia device and MoCA are enabled is communicated by letter, the CATV couple in adapter must be passive and the MoCA of transmission signal arranged between the source port.

Allow passive and have a kind of technology of the MoCA signal transmission between the source port to be to use the MoCA signal bypass path that comprises the band pass filter that is used for the MoCA signal frequency, like what discuss in the patent application before mentioning in the above.Such MoCA signal bypass path and active signal communication path are substantially parallel, and this active signal communication path is having transmission active C ATV upstream and downstream signal between source port and the catv network.Yet, comprise that in the MoCA bypass path parallel the MoCA band pass filter exerts an influence to other parallel signal paths with active C ATV signal communication paths.The filter in each path causes the variation of the frequency response characteristic of other parallel path filters.As the result of these influences, need add the filter in the parallel signal communication paths with consuming time tuning to realize the desired frequency response.In some cases, must in parallel filtering path, use more extensive, complicated with expensive filter.The complexity of the increase of filter and the additional tuning cost that improves couple in adapter.Improved the risk that the service quality of the risk that breaks down or customer experience worsens for accurate tuning demand with the complexity that increases.This risk has also increased the frequency of the service call that CATV service provider carries out, and for the service provider, this service call is great expense.

Summary of the invention

The present invention is directed to a kind of CATV couple in adapter, it valuably the subscriber guard station is connected to catv network and the be in foundation of network contributes to MoCA.CATV couple in adapter of the present invention effectively through MoCA signal bypass path at the passive port of CATV couple in adapter with have and transmit the MoCA signal between the source port.MoCA signal bypass path comprises a pair of directional coupler.Use directional coupler to avoid increasing the frequency tuning relevant cost and the complexity of the MoCA signal frequency signal specific communication path that is parallel to the specific CATV upstream and downstream of frequency signal communication paths.MoCA signal bypass path and directional coupler with the MoCA extension of network be comprise active and passive port the two and can influence CATV signal through CATV couple in adapter conduction sharply.

According to these characteristics; One aspect of the present invention may be summarized to be a kind of cable television (CATV) couple in adapter; It has access interface, passive port and a plurality of have source port be used for transmit the CATV signal between catv network and the subscriber device and also be used for passive being connected to of subscriber guard station MoCA network and the subscriber device that has the MoCA of source port to enable between transmit the MoCA signal.This CATV couple in adapter comprises first and second splitters, and each splitter has the signal component leg (1eg) of common terminal and separation.The common terminal of first division device is operatively coupled to access interface.The leg of the separation of second splitter has been separately connected to source port.Active side positioning coupler operatively is connected between the leg of a separation of common terminal and first division device of second splitter.The inactive side directional coupler operatively is connected between the leg of another separation of passive port and first division device.The coupling port of directional coupler links together with passive and the MoCA of transmission signal arranged between the source port.

Further according to above-mentioned characteristic; Another aspect of the present invention may be summarized to be the method for a kind of use cable television (CATV) couple in adapter; This CATV couple in adapter has access interface; Passive port and a plurality of has source port with at the catv network that is connected to access interface and be connected to passive and have between subscriber's device of source port and transmit the CATV signal, simultaneously be connected passive and the multimedia device that has the MoCA in the MoCA network of source port to enable between transmit the MoCA signal simultaneously.This method is included in the access interface place CATV signal is conducted to catv network and conducts the CATV signal from catv network; Conduct passive CATV signal through the main leg that operatively is connected the inactive side directional coupler between access interface and the passive port; Through operatively being connected a plurality of main leg conduction active C ATV signals that active side positioning coupler between the source port is arranged of access interface and this, and the directed leg of the connection through inactive side and active side positioning coupler is passive and conduction MoCA signal between the source port arranged.This method also can comprise prevent that the MoCA signal is transmitted on the catv network in the CATV access device.

According to an aspect of the present invention; A kind of CATV couple in adapter is provided; It has access interface; Passive port and a plurality of has source port transmitting the CATV signal between catv network and the subscriber device and also be used between the said passive and subscriber device that has the MoCA of source port to enable of being connected to of the MoCA of subscriber guard station network, transmitting the MoCA signal being used for; This CATV couple in adapter comprises: the first two-way splitter/combiner; It has the common terminal and the first and second signal component legs, and this first division device/combiner is split into the heading signal at each place of its first and second leg with the signal at its common terminal place, and will be the individual signals at its common terminal place in the signal combination at the first and second leg places also; The second two-way splitter/combiner; It has the signal component leg of common terminal and a plurality of separation; This second splitter/combiner is split into the heading signal at each place of the leg of its separation with the signal at its common terminal place, and is the individual signals at its common terminal place with the signal combination at the leg place of its separation also; Active side positioning coupler, it has input port, through port, its input and through the relatively low signal attenuation master leg between the port, coupling port with and input and coupling port between the relative higher signal directed leg of decaying; The inactive side directional coupler, it has input port, through port, its input and through the relatively low signal attenuation master leg between the port, coupling port with and input and coupling port between the relative higher signal directed leg of decaying; And wherein the common terminal of first division device/combiner is operatively coupled to access interface; The leg of the separation of second splitter/combiner has been connected to source port separately; The main leg of inactive side directional coupler is operatively coupled between first leg of passive port and first division device/combiner; The main leg of active side positioning coupler is operatively coupled between second leg of input port and first division device/combiner of second splitter/combiner; And the coupling port of inactive side and active side positioning coupler operatively links together with the tap leg through two directional couplers passive and conduction MoCA signal between the source port arranged.

According to a further aspect in the invention, said CATV couple in adapter further comprises: be connected the common terminal of first signal splitter/combiner and the MoCA signal frequency rejects trap between the CATV access interface.

According to a further aspect in the invention, being operatively connected between the common terminal of second leg of first division device/combiner and second splitter/combiner constitutes the source signal communication path; And said active signal communication path comprises the electronic unit of the consumed power that is adjusted in the CATV signal that conducts in the active signal communication path.

According to a further aspect in the invention, the active signal communication path comprises that the intrusion noise that is used to control the upper reaches intrusion noise that is derived from the subscriber device that is connected to source port in operation alleviates circuit.

According to a further aspect in the invention, the active signal communication path further comprises: active downstream signal communication path, and it comprises the CATV downstream signal bypass filter that except the CATV downstream signal, stops all signals basically; And active stream signal communication path, it comprises the CATV stream signal bypass filter that except the CATV stream signal, stops all signals basically.

According to a further aspect in the invention, the electronic unit of consumed power is connected in the active downstream signal communication path; And the electronic unit of consumed power comprises amplifier.

According to a further aspect in the invention, the signal of the main leg conduction through directional coupler is than still less the signal attenuation far away of the signal experience of the directed leg conduction through directional coupler.

According to a further aspect in the invention, main leg is not more than about 2dB to the decay of the signal through its conduction; And directed leg is to the 20dB at least that decays to of the signal through its conduction.

According to another aspect of the invention; A kind of CATV couple in adapter is provided; It has the CATV access interface; Passive port and a plurality of has source port transmitting the CATV signal between catv network and the subscriber device and also be used between the said passive and subscriber device that has the MoCA of source port to enable of being connected to of the MoCA of subscriber guard station network, transmitting the MoCA signal being used for, and this CATV couple in adapter comprises: housing; In housing, be connected to the MoCA frequency rejects trap of access interface; And a pair of directional coupler in the housing; Each directional coupler has main leg and directed leg; The main leg of a directional coupler operatively is connected between MoCA frequency rejects trap and the passive port; The main leg of another directional coupler operatively is connected MoCA frequency rejects trap and has between the source port, thereby and the directed leg of directional coupler operatively link together passive and the MoCA of transmission signal arranged between the source port.

According to another aspect of the invention, said CATV couple in adapter further comprises: active electronic component, it amplifies or otherwise regulates the CATV signal through it, and it is at access interface with have between the source port.

According to another aspect of the invention, said CATV couple in adapter further comprises: the CATV signal bypass filter that is connected in series with this active electronic component; And wherein passive and have the MoCA signal that transmits between the source port on MoCA signal bypass path, to transmit fully basically, and stoped by CATV signal bypass filter basically and transmit through this active electronic component.

According to another aspect of the invention, transmit through passive and MoCA signal that the directional coupler between the source port arranged than transmitting through access interface and passive and have the CATV signal of the directional coupler between the source port to suffer more substantial relatively signal attenuation.

The following detailed description of the referenced drawings currently preferred embodiment through combining following brief overview, and with reference to the claim of enclosing can obtain more complete understanding of the present invention and the present invention and realize above-mentioned and other improved modes.

Description of drawings

Fig. 1 illustrates the block diagram that merges a plurality of CATV couple in adapters of the present invention, and it is shown as the network interconnection of being in catv network and a plurality of MoCA, and each MoCA network of being in is positioned at the subscriber guard station and locates.

Fig. 2 is the vague generalization perspective view of a CATV couple in adapter shown in Figure 1; It is connected to a MoCA network in the subscriber guard station, and the more details that wherein are connected to active and passive subscriber device and the MoCA network of CATV couple in adapter illustrate with the form of block diagram.

Fig. 3 is the block diagram of the functional part of CATV couple in adapter shown in Figure 2, and this CATV couple in adapter is shown as and is connected to catv network, and also shows the parts of the node that forms the MoCA network.

Embodiment

Usually show among Fig. 1 and merge community of the present invention access or cable television (CATV) couple in adapter 10.CATV couple in adapter 10 be arranged in the CATV subscriber 12 places, guard station or CATV subscriber guard station 12 and form the be in part of entertainment network 14 of traditional M oCA.Multimedia device 16 is through 14 interconnection of the MoCA network in the subscriber guard station 12.Multimedia device 16 uses MoCA network 14 transmitting content of multimedia or MoCA signal each other.MoCA network 14 is partly formed by the coaxial cable infrastructure that is pre-existing in that exists in the subscriber guard station 12 (generally by coaxial cable 18 expressions).The example of multimedia device 16 is digital VTR, computer, data modem unit, computer game, television set, TV set-top box, some telephone plant (such as auxiliary telephone and automatic-answering back device machine) and other audio frequency and vision entertainment device particularly.Usually, multimedia device 16 constitutes active subscriber device.

CATV couple in adapter 10 also is the part of traditional catv network 20.The CATV couple in adapter with in the CATV perhaps signal be delivered to the subscriber device of subscriber guard station 12 from catv network 20.Except that multimedia device 16, subscriber device can also comprise other devices that do not turn round but the expection conduct is connected to the result of catv network 20 as the part operation of MoCA network 14.Usually are not eMTA devices 21 as the example of the subscriber device of the part of MoCA network 14, it is by voice modem 46 and the telephone set that is connected 48 illustrations.

The CATV downstream signal that subscriber device and eMTA device 21 receives from catv network 20, and subscriber device and eMTA device 21 are to catv network transmission CATV stream signal.The CATV upstream and downstream signal that between catv network 20 and eMTA device 21, transmits is passive CATV signal.Send to catv network 20 and the CATV upstream and downstream signal that received by catv network 20 is an active C ATV signal by other subscriber devices.The eMTA device 23 that MoCA enables also transmits the MoCA signal with MoCA network 14.The eMTA device 23 that MoCA enables comprises traditional eMTA device 21 and MoCA interface arrangement 73.16 of the multimedia devices that MoCA interface arrangement 73 allows to enable at all MoCA transmit the MoCA signal.

CATV couple in adapter 10 has beneficial characteristics, and said characteristic allows it in MoCA network 14 and catv network 20, to turn round by a plurality of roles simultaneously, thereby is of value to MoCA network 14 and catv network 20.CATV couple in adapter 10 turns round as hub in MoCA network 14, between multimedia device 16 and eMTA interface arrangement 73, to transmit effectively or dispensing MoCA signal.In this way, CATV couple in adapter 10 transmits the MoCA signal effectively between eMTA device 23 that MoCA enables and multimedia device 16, thereby with the distribution of functionality of eMTA device 23 multimedia device 16 to whole subscriber guard station.CATV couple in adapter 10 also turns round as catv network 20 and the interface between the subscriber device of subscriber guard station by traditional role, between subscriber device and catv network 20, to transmit the CATV signal.More describe these and other improvement and function below in detail.

Catv network 20 shown in Fig. 1 has typical topology.Downstream CATV signal 22 rises from the program source at head end 24 places of catv network 20, and in the continuous path through trunk cable 26, signal splitter/combiner 28, submain cable 30, another signal splitter/combiner 32, distribution cable coupling box (distribution cable branch) 34, cable breakout 36 and breakout cable 38, is transmitted to CATV couple in adapter 10.Stream signal 40 is delivered to catv network 20 from CATV couple in adapter 10, and is transmitted to head end 24 by opposite order.Traditional relay amplifier 42 is dispersed in the suitable position in the topology of catv network 20, and it amplifies downstream signal 22 and stream signal 40.Traditional relay amplifier also can be included in the cable breakout 36.Cable breakout 36 and signal splitter/combiner 28 are divided into a plurality of downstream signals that separate with 32 with single downstream signal, and a plurality of stream signal are combined as single stream signal.

CATV couple in adapter 10 receives downstream signals 22 in catv network connection or access interface 44 places from catv network 20.Passive downstream signal is transmitted to eMTA device 21 through CATV couple in adapter 10 and regulates without amplification, enhancing, modification or other essence.Passive downstream signal is delivered to passive subscriber device from passive port 45, promptly is connected to the eMTA device 21 of voice modem 46 expressions of telephone set 48 by the eMTA device 23 that enables through MoCA.

Active downstream signal by the active electronic circuit block (such as amplifier) of the consumed power in the CATV couple in adapter 10 for example amplify, the adjusting of filtering, modification, enhancing or other modes.Active downstream signal is divided into a plurality of duplicates, and has in the source port (be labeled as 49 jointly, but in Fig. 2, be labeled as 50,52,54 and 56 separately) each to send duplicate from a plurality of.Active downstream signal is delivered to the active subscriber device that is positioned at 12 places, subscriber guard station.

Typically, active subscriber device will be as the part of MoCA network 14 and the multimedia device 16 that connects.Yet active subscriber's device needs not to be that MoCA enables.The example of active subscriber's device that non-MoCA enables is the television set that source port is arranged that under the situation of not using the MoCA interface, is directly connected to the CATV couple in adapter.In this example, the television set that enables of non-MoCA will not be the part of MoCA network 14.

The CATV subscriber device typically generates stream signal 40 (Fig. 2) and they is delivered to CATV couple in adapter 10 with for delivery to catv network 20.Stream signal 40 can be the passive stream signal that eMTA device 21 generates, perhaps stream signal 40 can be by as be connected to the illustrative active subscriber device of STB (all not shown) of television set or the active stream signal that multimedia device 16 generates.STB allows subscriber/beholder to carry out program and watches selection.

More details about the CATV access device have been shown among Fig. 2.CATV couple in adapter 10 comprises housing 58, and it seals internal electronics parts (shown in Fig. 3).Mounting flange 60 allows CATV couple in adapter 10 is attached to the supporting construction at place, subscriber guard station around the hole 62 in housing 58 and the flange 60.The electrical power that is used for the active parts of CATV couple in adapter 10 provides from the traditional DC power supply 66 that is connected to special power input port 68.As an alternative, electrical power can provide through one the traditional power inserter (not shown) that is connected in source port 50,52,54 or 56.The power inserter allows to conduct the DC power of relative low-voltage through the identical source port that has that also conducts high-frequency signal.Use traditional power inserter to have eliminated needs to separate private power port 68, perhaps provide can also through its apply electrical power for selecting port.Power supply 66 or the power that provides from the power inserter typically derive from the traditional wall outlet (not shown) the subscriber guard station.The catv network that catv network 20 is connected to CATV couple in adapter 10 connects access interface 44.

Port

44,45,50,52,54,56 and 68 is all preferably formed by traditional female coaxial cable connector, the internal part that it is mechanically connected to housing 58 and is connected electrically to CATV couple in adapter 10.Coaxial cable 18 from subscriber guard station cable infrastructure is connected to CATV couple in adapter 10 with breakout cable 38 (Fig. 1) through the public coaxial cable connector of the corresponding cooperation (not shown) on these coaxial cables being mechanically connected to the female coaxial cable connector that forms

port

44,45,50,52,54,56 and 68.

Settle a CATV couple in adapter 10 at each place, subscriber guard station.Active and

passive port

45,50,52,54 and 56 quantity are by the quantity decision of the coaxial cable 18 that spreads all over subscriber guard station cabling.Although the CATV couple in adapter 10 shown in Fig. 2 comprises seven ports, other couple in adapters can have the greater or lesser port of quantity.The quantity of the coaxial cable 18 in the subscriber guard station and cabling have constituted the cable infrastructure by being in of using of MoCA network 14 (Fig. 1) or subscriber guard station.

Because CATV service provider provides the CATV couple in adapter 10 that is used by each CATV subscriber, therefore advantageously, the quantity of the difference configuration of the CATV couple in adapter that the minimizing subscriber possibly need.Except that other, doing like this provides the mass-produced economical efficiency of scale, has reduced the chance of setup error, cable infrastructure that the permission subscriber expands and change is in, and reduced cost of inventory.In CATV couple in adapter 10, incorporating function into has also promoted the economical efficiency of scale, mistake minimizing, extended capability, multifunctionality and cost of inventory to reduce so that the ability as the hub in the MoCA network 14 (Fig. 1) to be provided to it.The improvement that utilizes hereinafter to describe, CATV couple in adapter 10 allow effectively to use the eMTA device 23 and multimedia device 16 that in MoCA network 14, connects, and can deterioration or infringement offer the VOIP service of the eMTA device 23 that MoCA enables.

Each coaxial cable 18 of the cable infrastructure of being in terminates at cable and exports 70 places.Those current untapped coaxial cables 18 preferably export the suitable termination resistor (not shown) termination at 70 places with the cable that is positioned at these coaxial cables 18.Yet, in most of situation, the MoCA interface arrangement 72 that the multimedia device 16 that the cable of coaxial cable 18 outlet 70 is connected to separation is connected.

Each MoCA interface arrangement 72 is traditional and comprises the controller (not shown) that this controller is programmed to have the necessary function that is used to realize MoCA communication protocol.Each MoCA interface arrangement 72 is connected between cable outlet 70 and the multimedia device 16.When multimedia device 16 is created the output signal; These output signals are packed or otherwise be included in the MoCA signal that MoCA interface arrangement 72 creates; And these MoCA signals are by the coaxial cable 18 of a MoCA interface arrangement 72 through the cable infrastructure of being in subsequently, are sent in the MoCA network 14 at place, subscriber guard station another through the CATV couple in adapter 10 as the MoCA hub and receive MoCA interface arrangement 72.Receive MoCA interface arrangement 72 and extract initial encapsulation or otherwise be included in the output signal in the MoCA signal, and receive MoCA interface arrangement 72 with these original output signals offer receive MoCA interface arrangement 72 attached multimedia device 16.Receive MoCA interface arrangement 72 and can supervisory signal be sent it back original transmitted MoCA interface arrangement 72 with the reception of confirming the MoCA signal and the information such as signal strength signal intensity is provided in addition.Through this mode, comprise from the MoCA signal of the content of multimedia of a multimedia device 16 and be delivered to multimedia device 16 that another MoCA enables to use in its position through MoCA network 14 (Fig. 1).Turn round through this mode, and aspect the conventional term of in network field, using, MoCA interface arrangement 72 and multimedia device 16 have formed a node 74 of MoCA network 14.The MoCA signal transmits between the different MoCA node 74 of MoCA network 14 by described mode.

Separate although MoCA interface arrangement 72 is shown as with multimedia device 16, each MoCA interface arrangement 72 typically is incorporated in the multimedia device 16 that each MoCA enables or as its integral part.Yet for those multimedia devices 16 that does not comprise built-in MoCA interface arrangement 72, the device 72 that isolated M oCA enables is connected to multimedia device 16 and participates in MoCA network 14 to allow it thus as node.

Because eMTA device 21 is connected to MoCA interface arrangement 73, so eMTA device 21 is also participated in MoCA network 14.EMTA device 21 and the MoCA interface arrangement 73 that connects constitute the eMTA device 23 that MoCA enables.MoCA interface arrangement 73 can be the integral part of eMTA device 23.Aspect transmission MoCA signal; MoCA interface arrangement 73 is similar to MoCA interface arrangement 72, but MoCA interface arrangement 73 does not have when having electrical power to can be used for MoCA interface arrangement 73 passive CATV signal is delivered to the eMTA device and transmits the additional Functional Capability from the passive CATV signal of eMTA device.

The internal functional unit of CATV couple in adapter 10 has been shown among Fig. 3.These internal circuit components comprise first traditional double to signal splitter/combiner 76, the downstream signal 22 from catv network 20 that its division receives at the common terminal place from access interface 44.Downstream signal 22 is split at the passive CATV downstream signal 78 at signal component leg 79 places of a separation and is split into the active C ATV downstream signal 80 at signal component leg 81 places of another separation.Passive CATV downstream signal 78 conducts to passive port 45 and through passive port 45, through MoCA interface arrangement 73, conducts to eMTA device 21 in CATV passive signal communication path 79.Passive CATV stream signal 82 is created by eMTA device 21, and through MoCA interface arrangement 73, passive port 45 and CATV passive signal communication path 79 conduct to signal splitter/combiner 76 to become the CATV stream signal 40 in the catv network 20.The CATV passive signal communication path 79 that is used for passive signal in the CATV couple in adapter 10 do not comprise and possibly break down or the active electronic component of malfunctioning consumed power, thereby strengthened the reliability of CATV passive communication.79 expections of CATV passive signal communication path are reliable as far as possible, because it is used for urgent and crisis situation.

Active C ATV downstream signal 80 from the signal component leg 81 of other separation of splitter/combiner 76 is transmitted to a CATV downstream frequency bandpass filter 84 in the active downstream signal communication path 85 of CATV.Downstream filters 84 is through having the signal of the frequency in the frequency range of the CATV downstream of 54-1002MHz, and suppresses signal with the frequency in other scopes.The downstream signal that filter 84 passes through is amplified by amplifier 86 and is provided for the 2nd CATV downstream frequency bandpass filter 88 subsequently, and both also are the parts of the active downstream signal communication path 85 of CATV these.

Then, the active C ATV downstream signal through amplification and further filtering is conducted the active side positioning coupler 89 through a part that forms composite signal communication path 90.The CATV downstream signal is conducted to the common terminal of second traditional double of a part that also forms composite signal communication path 90 to splitter/combiner 94 through active side positioning coupler 89.Splitter/combiner 94 is with the division of these signals or be divided into four identical CATV downstream signals, each identical CATV downstream signal have the CATV downstream signal that is applied to splitter/combiner 94 at first power or signal strength signal intensity roughly 1/4th.Each heading signal is sent by one from the

signal component leg

91,92,93 and 95 of four separation of splitter/combiner 94.From what four heading signals of the

signal component leg

91,92,93 of splitter/

combiner

94 and 95 were applied to CATV couple in adapter 10 respectively

source port

50,52,54 and 56 places are arranged.Although show four

source port

50,52,54 and 56 is arranged; But the splitter/combiner that has the signal component leg of varying number through use; Perhaps through using the splitter/combiner of a plurality of cascades; Realized more having source port, the heading signal of the desired amt of source port has been arranged with all that obtain being applied to couple in adapter 10.

In response to regard to the degree that the obtainable CATV downstream signal of

source port

50,52,54 and 56 places is arranged, each MoCA interface arrangement 72 is directly delivered to multimedia device 16 with these downstream signals with regard to the multimedia device 16 that is connected to source port through coaxial cable 18.The CATV downstream signal that MoCA interface arrangement 72 is not revised or otherwise influence is passed through it.Can send in the situation of CATV stream signal 96 at those multimedia devices 16, those CATV stream signal 96 are passed MoCA interface arrangement 72 equally and are not changed or influence and subsequently through cable outlet 70, coaxial cable 18 and there is

source port

50,52,54 or 56 to be transmitted to splitter/combiner 94.Splitter/combiner 94 makes up all CATV stream signal 96 and these signals is offered active side positioning coupler 89 as the active stream signal 96 of combination.

Be provided for a CATV upstream frequencies band pass filter 98 of a part that forms the active stream signal communication path 99 of CATV from the CATV stream signal 96 of active side positioning coupler 89.Filter 98 is through having the signal of the frequency in the CATV of 5-42MHz upstream frequencies scope, and suppresses signal with the frequency in other scopes.The CATV stream signal that filter 98 passes through is provided for the intrusion noise subsequently and alleviates circuit 100.The intrusion noise alleviates circuit 100 and controls the intrusion noise in the 0-42MHz scope of the noise source that possibly rise in the subscriber guard station.The use that the intrusion noise alleviates circuit 100 is optional in CATV couple in adapter 10; If but use; Then preferably use and have the U.S. Patent application of submitting on October 13rd, 2,008 12/250 that is entitled as " Ingress Noise Inhibiting Network Interface Device and Method for Cable Television Networks "; The noise of the form of describing in 227 alleviates circuit 100, and this application is transferred the possession of in assignee of the present invention.

Leave and invade the CATV stream signal that noise alleviates circuit 100 and be applied to the 2nd CATV upstream frequencies band pass filter 102 subsequently.The 2nd CATV upstream frequencies band pass filter 102 also is optional use.If first upper reaches band pass filter 98 provides enough frequency filtering features and use the intrusion noise to alleviate circuit 100, then second upper reaches band pass filter 102 can be optional.In some cases, or even use to invade noise when alleviating circuit 100, can also eliminate second upper reaches band pass filter 102.The intrusion noise alleviates circuit 100 and the 2nd CATV upper reaches band pass filter 102 also is the part of the active stream signal communication path 99 of CATV.

Be provided for the signal component leg 81 of splitter/combiner 76 from the active stream signal of the active stream signal communication path 99 of CATV.Be provided for the signal component leg 79 of splitter/combiner 76 from the passive stream signal 82 of CATV passive signal communication path 79.Splitter/combiner 76 combinations offer the signal of its

signal component leg

79 and 81 to form single combination stream signal 40, and combination stream signal 40 is provided for catv network 20 through access interface 44.

When the subscriber device (not shown) that enables as the hub in the MoCA network 14 (Fig. 1) and non-MoCA when CATV couple in adapter 10 is connected to the unique passive port 45 of this couple in adapter 10; 14 on MoCA network is present in has source port 50; Between 52,54 and 56 and through them.Transmitted through cable outlet 70 from the MoCA signal of MoCA interface arrangement 72 104, coaxial cable 18 has

source port

50,52, and 54 and 56 and splitter 94.Splitter 94 has traditional structure, wherein in the MoCA signal band, between all

signal component legs

91,92,93 and 95 of splitter 94, has low relatively isolation, transmits to promote the MoCA signal between its

signal component leg

91,92,93 and 95.By this way, splitter 94 MoCA signal 104 is conducted to be connected to couple in adapter all coaxial cables 18 to realize the MoCA signal transmission between all MoCA interface arrangements 72.

The eMTA subscriber device that non-MoCA is enabled is attached to passive port 45 and has deprived the subscriber and use the interests of passive port 45 as the part of MoCA network 14 (Fig. 1).The subscriber device that MoCA is enabled (for example MoCA enable eMTA device 23) is connected to the eMTA device 23 that passive port 45 allows MoCA to enable and participates in MoCA networks 14.When the eMTA device 23 that enables as MoCA was connected to passive port 45, the subscriber obtained the ability with phone and other service assignment other multimedia devices 16 in the MoCA network 14.Except that other equipment, the exemplary multimedia device 16 that can receive the telephone service of distribution comprises auxiliary telephone and answering machine.

When the passive subscriber device that enables as MoCA (for example MoCA enable eMTA device 23) was connected to passive port 45, MoCA network 14 comprised passive port 45 and source port 50,52 is arranged, 54 and 56.Because the MoCA signal in filter 84,88,98 and the 102 serious decay 1125-1525MHz frequency ranges, so the MoCA signal can not conduct through the active upstream and downstream signal communication paths 99 of CATV and 85.And, attempt in the opposite direction the conduction of MoCA signal can be caused the serious decay of those signals through amplifier 86, if such conduction or even if possible.When trial alleviates circuit 100 with the conduction of MoCA signal through invading noise, can produce similar result.

In order to allow CATV couple in adapter 10 that MoCA signal 104 has been passed to source port 50,52 from

passive port

45,54 and 56, between CATV passive signal communication path 79 and composite signal communication path 90, set up MoCA signal bypass path 106.MoCA signal bypass path 106 includes source directional coupler 89 and inactive side directional coupler 112.MoCA signal bypass path 106 extends between the coupling port 110 of the coupling port 108 of active side positioning coupler 89 and inactive side directional coupler 112.Be arranged in such a way, inactive side directional coupler 112 becomes the part of CATV passive signal communication path 79, and active side positioning coupler 89 becomes the part of composite signal communication path 90.MoCA signal bypass path 106 also is connected to CATV active signal communication path 85 and 99.

Directional coupler 89 and 112 has traditional structure, and each all has 4 ports respectively: coupling port 108 and 110; Input port 116 and 117; Through port one 18 and 119; And isolated port 121 and 123.Isolated port 121 and 123 is terminated in the couple in adapter 10 their appropriate characteristics impedance (not shown).Each coupler 89 and 112 traditional function property make the most of power circuit that gets at input port 116 and 117 places cross directional coupler and arrive through port one 18 and 119 that wherein the input power of residual volume flow to coupling port 108 and 110.Power in input port 116 and the entering of 117 places is not coupled to isolated port 121 and 123 basically.In addition, the power that gets into coupling port will flow to input port and will with pass through port isolation.By this way; From the MoCA signal of

MoCA interface arrangement

72 and 73 easily conduction through coupling port 108 and 110 and pass through MoCA signal bypass path 106, thereby guarantee to be connected to the strong relatively MoCA signal transmission between the device that the MoCA of

port

45 and 70 enables.

Each coupler 89 and 112 traditional function property make through most of power circuit to the input port 116 and 117 of port one 18 with the entering of 119 places.Power getting into through port one 18 and 119 places is not coupled to coupling port 108 and 110 basically.The amount that flow to coupling port 108 and 110 ingoing power that applies at input port 116 and 117 places is confirmed by the coupling factor related with each directional coupler.The degree of the power that suppresses at the isolated port place is confirmed by the inhibiting factor related with each directional coupler.Said coupling and inhibiting factor also are applied to respectively at the ingoing power through port one 18 and 119 places with respect to isolated port 121 and 123 and the coupling and the isolation of coupling port 108 and 110.

Here be called as " main leg " from input port 116 and 117 to signal path through directional coupler 89 and 112 respectively through port one 18 and 119.As stated, the signal that on arbitrary direction, transmits through main leg can meet with a spot of signal attenuation, preferably less than 1 or 2 decibel (dB).Be called as " directed leg " through directional coupler 89 and 112 here from input port 116 and 117 signal paths to coupling port 108 and 110.As stated, can meet with the signal attenuation of about some moderate amount of 10 to 20dB through the signal of directed leg in arbitrary direction transmission.As stated because directional coupler 89 and 112 normal function property, prevent basically stop signal respectively through port one 18 and 119 and coupling port 108 and 110 between pass through.

Directional coupler 89 and 112 input port 116 and 117 are connected respectively to the common terminal and the passive port 45 of splitter 94.Directional coupler 89 pass through port one 18 is operatively coupled to splitter/combiner 76 through active downstream of CATV and stream signal communication path 85 and 99 second leg 81.Directional coupler 112 pass through first leg 79 that port one 19 is operatively coupled to splitter/combiner 76.The a spot of signal attenuation that main leg met with of CATV signal through directional coupler 89 and 112 does not influence the functional of eMTA device 23 that MoCA enables or other subscriber devices that source port is arranged that possibly be connected to CATV couple in adapter 10.

The MoCA signal 104 that is derived from MoCA interface arrangement 73 is through passing MoCA signal bypass path 106 (promptly through passive port 45; The input port 117 of inactive side directional coupler 112; The directed leg of inactive side directional coupler 112 and coupling port 110; MoCA signal bypass path 106, the coupling port 108 and the directed leg of active side positioning coupler 89, and the input port 116 of active side positioning coupler 112) and be passed to MoCA interface arrangement 72.Signal conducts through splitter 94 subsequently and source port 50,52 is arranged, and 54 and 56 arrive MoCA interface arrangement 72.

Similarly, the MoCA signal 104 that is derived from MoCA interface arrangement 72 is passed to MoCA interface arrangement 73.These MoCA signals 104 pass splitter 94; The input port 116 of active side positioning coupler 89; The coupling port 108 and the directed leg of active side positioning coupler 89, MoCA signal bypass path 106, the coupling port 110 and the directed leg of inactive side directional coupler 112; And the input port 117 of inactive side directional coupler 112, and passive port 45.By this way, the eMTA device 23 that enables of MoCA is communicated by letter with MoCA interface arrangement 72 and multimedia devices 16 in the MoCA network 14.

Because directional coupler 89 and 112 is not that frequency is controlled, so CATV stream signal 82 is passed through MoCA signal bypass path 106 with % and 104 conduction of MoCA signal.Yet, transmit eMTA device 23 or

MoCA interface arrangement

72 and 73 ignorance that MoCA that any CATV stream signal through MoCA signal bypass path 106 all is received them enables.

Using directional coupler 89 and 112 to set up the interior MoCA signal bypass path of CATV couple in adapter 10 106 is useful in several importances.Because MoCA signal bypass path 106 do not comprise frequency filter, avoided the problem of tuning and two active downstream and stream signal communication path 85 three frequency filter parallel with 99.Compare with the complexity of filter in tuning three parallel frequency signal specific communication paths, only use two parallel frequency signal specific communication paths 85 and 99 greatly to simplify the tuning of band pass filter in those signal communication paths.Directional coupler 89 and 112 not required power is operated, thereby the eMTA device 23 that allows MoCA to enable is communicated by letter with catv network 20 under the situation of the interruption in power that arrives CATV couple in adapter 10.Directional coupler 89 and 112 is parts that can obtain easily of simplifying the manufacturing of CATV couple in adapter 10.

MoCA signal bypass path 106 extends to MoCA network 14 except those effectively with directional coupler 89 and 112 and has been connected to source port 50,52, also comprises the MoCA compatible apparatus that is connected to passive port 45 outside 54 and 56 the device.In MoCA network 14, comprising passive port 45 can communicate by letter the MoCA compatible apparatus that is connected to passive port 45 (for example MoCA enable eMTA device 23) with the multimedia device 16 in the MoCA network 14.Except that other multimedia devices, the multimedia device 16 that can communicate by letter with the eMTA device 23 that MoCA enables valuably comprises auxiliary telephone and automatic-answering back device machine.

CATV couple in adapter 10 also comprises the MoCA frequency rejects trap 120 that is connected between splitter/combiner 76 and the catv network access interface 44.MoCA frequency rejects trap 120 prevent the MoCA signal from couple in adapter 10 through the catv network 20, but allow the CATV signal significantly to damage through not have.MoCA frequency rejects trap 120 absorbs the energy of MoCA signal, thereby prevents that the MoCA signal from arriving catv network 20.MoCA frequency rejects trap 120 also prevents to receive the MoCA signal from MoCA network 14 (Fig. 1) in contiguous subscriber guard station.Like what understand by Fig. 1; Under the situation that does not have MoCA frequency rejects trap 120; MoCA signal from a CATV couple in adapter 10 can pass breakout cable 38 arrival cable breakout 36, and arrives the CATV couple in adapter 10 of vicinity through another breakout cable 38 of this cable breakout 36 from this cable breakout.MoCA frequency rejects trap 120 prevents this from occurring, thereby has protected the safety and the privacy of the MoCA signal in the MoCA network 14 in each subscriber guard station.MoCA frequency rejects trap 120 prevents that also the MoCA signal from contiguous subscriber guard station from influencing unfriendly or worsen the MoCA quality of signals in the contiguous MoCA network that is connected to cable breakout 36 (Fig. 1).

CATV couple in adapter 10 is valuably to contributing from catv network 20 with from the quality of the available service of MoCA network 14.When the CATV of reservation expection was functional at the same time, CATV couple in adapter 10 was also fully as the MoCA signal of MoCA hub with transmission sufficient intensity between all MoCA interface arrangements and multimedia device.MoCA frequency rejects trap 120 has avoided the infringement expectation only to maintain the safety and the privacy of the MoCA content in the MoCA network of each subscriber guard station.In the housing of CATV couple in adapter, obtain the favourable functional of CATV couple in adapter, thereby protect the functional of this expectation can not stand unwarranted distorting, carelessness and physics are installed are exposed.The multi-functional aspect of CATV couple in adapter allows it to use in many cases, thereby the economical efficiency of scale that has increased it is installed by CATV service provider with its usage economy and promotion more easily.CATV couple in adapter 10 allows the subscriber to expand more neatly and changes their CATV subscriber device and their MoCA network and multimedia device.

After understanding the present invention fully, these and other improve and the importance of advantage will become obvious.With certain level of detail the preferred embodiments of the present invention and its many improvement have been described above.Describe preferred exemplary in detail to embodiment of the present invention.The details of describing not necessarily plans to limit scope of the present invention.Scope of the present invention is limited following claim.

Claims

1. CATV couple in adapter; It has access interface; Passive port and a plurality of has source port transmitting the CATV signal between catv network and the subscriber device and also be used between the said passive and subscriber device that has the MoCA of source port to enable of being connected to of the MoCA of subscriber guard station network, transmitting the MoCA signal being used for, and this CATV couple in adapter comprises:

The first two-way splitter/combiner; It has the common terminal and the first and second signal component legs; This first division device/combiner is split into the heading signal at each place of its first and second leg with the signal at its common terminal place, and will be the individual signals at its common terminal place in the signal combination at the first and second leg places also;

The second two-way splitter/combiner; It has the signal component leg of common terminal and a plurality of separation; This second splitter/combiner is split into the heading signal at each place of the leg of its separation with the signal at its common terminal place, and is the individual signals at its common terminal place with the signal combination at the leg place of its separation also;

Active side positioning coupler, it has input port, through port, its input and through the relatively low signal attenuation master leg between the port, coupling port with and input and coupling port between the relative higher signal directed leg of decaying;

The inactive side directional coupler, it has input port, through port, its input and through the relatively low signal attenuation master leg between the port, coupling port with and input and coupling port between the relative higher signal directed leg of decaying; And wherein:

The common terminal of first division device/combiner is operatively coupled to access interface;

The leg of the separation of second splitter/combiner has been connected to source port separately;

The main leg of inactive side directional coupler is operatively coupled between first leg of passive port and first division device/combiner;

The main leg of active side positioning coupler is operatively coupled between second leg of input port and first division device/combiner of second splitter/combiner; And

The coupling port of inactive side and active side positioning coupler operatively links together with the tap leg through two directional couplers passive and conduction MoCA signal between the source port arranged.

2. CATV couple in adapter as claimed in claim 1 further comprises:

Be connected the common terminal of first signal splitter/combiner and the MoCA signal frequency rejects trap between the CATV access interface.

3. CATV couple in adapter as claimed in claim 2, wherein:

Being operatively connected between second leg of first division device/combiner and the common terminal of second splitter/combiner constitutes the source signal communication path; And

Said active signal communication path comprises the electronic unit of the consumed power that is adjusted in the CATV signal that conducts in the active signal communication path.

4. CATV couple in adapter as claimed in claim 3, wherein:

The active signal communication path comprises that the intrusion noise that is used to control the upper reaches intrusion noise that is derived from the subscriber device that is connected to source port in operation alleviates circuit.

5. CATV couple in adapter as claimed in claim 3, wherein:

The active signal communication path further comprises:

Active downstream signal communication path, it comprises the CATV downstream signal bypass filter that except the CATV downstream signal, stops all signals basically; And

Active stream signal communication path, it comprises the CATV stream signal bypass filter that except the CATV stream signal, stops all signals basically.

6. CATV couple in adapter as claimed in claim 5, wherein:

The electronic unit of consumed power is connected in the active downstream signal communication path; And

The electronic unit of consumed power comprises amplifier.

7. CATV couple in adapter as claimed in claim 1, wherein:

The signal of the main leg conduction through directional coupler is than still less the signal attenuation far away of the signal experience of the directed leg conduction through directional coupler.

8. CATV couple in adapter as claimed in claim 7, wherein:

Main leg is not more than about 2dB to the decay of the signal through its conduction; And

Directed leg is to the 20dB at least that decays to of the signal through its conduction.

9. CATV couple in adapter; It has the CATV access interface; Passive port and a plurality of has source port transmitting the CATV signal between catv network and the subscriber device and also be used between the said passive and subscriber device that has the MoCA of source port to enable of being connected to of the MoCA of subscriber guard station network, transmitting the MoCA signal being used for, and this CATV couple in adapter comprises:

Housing;

In housing, be connected to the MoCA frequency rejects trap of access interface; And

A pair of directional coupler in the housing; Each directional coupler has main leg and directed leg; The main leg of a directional coupler operatively is connected between MoCA frequency rejects trap and the passive port; The main leg of another directional coupler operatively is connected MoCA frequency rejects trap and has between the source port, thereby and the directed leg of directional coupler operatively link together passive and the MoCA of transmission signal arranged between the source port.

10. CATV couple in adapter as claimed in claim 9 further comprises:

Active electronic component, it amplifies or otherwise regulates the CATV signal through it, and it is at access interface with have between the source port.

11. CATV couple in adapter as claimed in claim 10 further comprises:

The CATV signal bypass filter that is connected in series with this active electronic component; And wherein:

Passive and have the MoCA signal that transmits between the source port on MoCA signal bypass path, to transmit fully basically, and stoped by CATV signal bypass filter basically and transmit through this active electronic component.

12. CATV couple in adapter as claimed in claim 11 wherein transmits through passive and MoCA signal that the directional coupler between the source port arranged than transmitting through access interface and passive and have the CATV signal of the directional coupler between the source port to suffer more substantial relatively signal attenuation.