CN103326746B - Broadband remote-transmission centralized control system based on multiple SHDSLs - Google Patents
Broadband remote-transmission centralized control system based on multiple SHDSLs Download PDFInfo
- Publication number
- CN103326746B CN103326746B CN201310252177.6A CN201310252177A CN103326746B CN 103326746 B CN103326746 B CN 103326746B CN 201310252177 A CN201310252177 A CN 201310252177A CN 103326746 B CN103326746 B CN 103326746B
- Authority
- CN
- China
- Prior art keywords
- signal input
- shdsl
- connect
- output terminal
- road
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Small-Scale Networks (AREA)
Abstract
The invention discloses a broadband remote-transmission centralized control system based on multiple SHDSLs. The broadband remote-transmission centralized control system based on the multiple SHDSLs is characterized by comprising M local side devices, M repeater devices and M far-end devices, wherein M is equal to 1, 2, 3...N, the local side devices and the far-end devices are mutually connected, the repeater devices are arranged between the local side devices and the far-end devices, and the local side devices are used in a cascade mode so that a remote broadband-self-organization local area network can be formed. The broadband remote-transmission centralized control system based on the multiple SHDSLs has the advantages that the multiple far end devices are accessed and managed in a centralized mode through the local side devices; the local side devices serve as the center, a plurality of far-end devices and repeater devices are equipped, a multimedia comprehensive digital communication system network which integrates packet switching and circuit switching is formed, and the radiation radius can reach tens of kilometers; one single local side device has 10 paths of double twisted-pair broadband communication, a plurality of local side devices can be piled up to form a larger self-organization network and circuit software does not need to be changed.
Description
Technical field
What the present invention relates to is a kind of broadband remote-transmission centralized control system based on multichannel SHDSL, belongs to communication technical field.
Background technology
SHDSL (Symmetric High bit rate Digital Subscriber Line), single to line high-speed digital subscriber line, follow ITU-T G.991.2, the consensus standards such as G994.2, be technically develop at HDSL, agreement is being done supplementary always in recent years.SHDSL adopts TC-PAM coded system, and encode higher, transmission speed is faster.Along with the transmission bandwidth of the TC-PAM 4/8/16/32/64/128, SHDSL of expansion covers 64Kbps ~ 15296 Kbps scope.Only need pair of telephone lines, the multiple communications types such as voice, data and video can be realized, greatly reduce the consumption of the copper cash resource of operator and user.Another feature of SHDSL is the advantage of its TC-PAM modulation system, when same speed, compares the transmission range that XDSL can more be grown.Greatly reduce single cost to line remote bi-directional symmetrical point-to-point communication private line service.According to the technical characterstic of SHDSL, it is mainly used in point-to-point high speed data transfer; The connection of remote single net, and the enterprise network special line of long-range less transmission capacity meeting business user is interconnected accesses with the Internet of symmetric bandwidth.Still there is no broadband remote-transmission communication system between how point-to-multipoint multichannel SHDSL.
Summary of the invention
What the present invention proposed is a kind of broadband remote-transmission centralized control system based on multichannel SHDSL, its object is to realize how point-to-multipoint broadband remote-transmission network communicating function.
Technical scheme of the present invention is, a kind of broadband remote-transmission centralized control system based on multichannel SHDSL, it is characterized in that comprising M local side apparatus, a M repeating equipment and M remote equipment, wherein local side apparatus and remote equipment interconnected, repeating equipment is located between local side apparatus and remote equipment, cascade can use between local side apparatus, form remote, broadband self-organizing local area network (LAN), described M=1,2.. N.
Beneficial effect of the present invention is, carries out concentrating access, management to multichannel remote equipment by local side apparatus.Centered by local side apparatus, be equipped with multiple remote equipment and repeating equipment, the multimedia integration digital communication system network integrating packet switching and circuit switching formed, radiation radius can reach dozens of kilometres, every separate unit local side apparatus accepts 10 road twisted-pair feeder bandwidth communication capabilities, some local side apparatus can the larger self-organizing network of stacking formation, and circuitry software can be accomplished without the need to change.
Accompanying drawing explanation
Accompanying drawing 1 is the broadband remote-transmission centralized control system centrally controlled network composition diagram of multichannel SHDSL.
Accompanying drawing 2 is local side apparatus structured flowcharts.
Accompanying drawing 3 is remote equipment structured flowcharts.
Accompanying drawing 4 is repeating device structure block diagrams.
Embodiment
Contrast accompanying drawing 1, a kind of broadband remote-transmission centralized control system based on multichannel SHDSL, it is characterized in that comprising M local side apparatus, a M repeating equipment and M remote equipment, wherein local side apparatus and remote equipment interconnected, repeating equipment is located between local side apparatus and remote equipment, cascade can use between local side apparatus, form remote, broadband self-organizing local area network (LAN), described M=1,2.. N.
Described local side apparatus, repeating equipment and remote equipment all use SHDSL modulation module; Described local side apparatus, repeating equipment and remote equipment transmission bandwidth are that 128Kpbs to 8Mpbs is adjustable, and under light-duty insulate line, transmission range is 3.5Km to 15Km; A described local side apparatus is ten remote equipment access capabilities, and local side apparatus with break-make, the transmission bandwidth on any road in the remote equipment controlling ten tunnels accesses, and can monitor the state such as decay, signal to noise ratio, packet loss of any road transmission; During the communication of described SHDSL modulation module be one main one from;
Adopt SHDSL technology, realize the business such as remote, large broadband, multi-multipoint sound, video and file transfer.Remote equipment realizes two end points of end-to-end communication, realizes broadband data communication.Repeating equipment realizes the further lifting of remote equipment communication distance, can as required, for extending between remote equipment and the communication distance of remote equipment and local side equipment room, by repeating equipment, can form the twisted-pair communication network of dozens of kilometres.Local side apparatus take twisted-pair feeder as transport vehicle, uses the integrated digital communication equipment integrating packet switching and circuit switching that SHDSL transmission technology is formed, and carries out concentrating access, centralized management to remote equipment.Centered by local side apparatus, be equipped with multiple remote equipment and amplifier, the multimedia system communication network of radiation radius dozens of kilometres can be set up into.Multichannel far-end is concentrated access by local side apparatus, and each great distance end has a pair twisted-pair feeder to be connected with local side, and local side apparatus can be connected to office terminal by Ethernet switch, and can be connected with voice, video traffic equipment, SPC telephone exchange.Remote equipment also has and is connected with voice, video traffic equipment, and has 3 railway digital phone access functions, and each road phone can be configured to digital junction, user interface or magnetic telephone respectively.
Contrast Fig. 2, the structure of described local side apparatus comprises 5 pieces of wiring boards, network board, master board, wherein every block wiring board has 2 road SHDSL interfaces, 4 road telephony interfaces, 2 road Ethernet interfaces, modulation-demodulation circuit, each road SHDSL interface docks with a remote equipment, the Ethernet access network board of 5 pieces of wiring boards, this network board comprises control circuit, switched circuit, wherein control circuit is made up of LPC1768 ARM chip, and switched circuit is formed primarily of two panels exchange chip 88E6095 cascade; Network board Zhong mono-road Ethernet receives external management interface, another road Ethernet in network board receives master board, this master board has that two road signals are corresponding with the control circuit in 5 pieces of wiring boards to connect, master board also has a road signal to connect with display interface, external management interface access exterior PC in network board, the upper operation of PC has office terminal software, and the bandwidth on each road of software merit rating also shows the line status of every block SHDSL.
The SHDSL protocol data that modulation-demodulation circuit completes far-end is come by Double-strand transmission carries out demodulation, outputs to local terminal ethernet device or TDM equipment after demodulation by Ethernet interface or TDM mouth.Simultaneously by local terminal being too modulated into SHDSL agreement and being gone out by Double-strand transmission of network interface or TDM interface data, modulation-demodulation circuit is formed primarily of 2 PEF24628.
Described network board comprises control circuit, switched circuit, and wherein control circuit is primarily of LPC1768 ARM chip composition, and switched circuit is formed primarily of two panels exchange chip 88E6095 cascade; Wherein LPC1768 is for completing initial configuration to two panels 88E6095 and state-detection, and exchange chip 88E6095 mainly completes the function of exchange of ten road Ethernets.
Described master board comprises acoustic code circuit, logical circuit, master processor, please supplement the work relationship between them, wherein acoustic code main circuit will complete the encoding and decoding speech function of 64K, master processor is connected by HPI mouth with the DSP of acoustic code circuit, by HPI realization to the download program of DSP and data interaction; Logical circuit mainly completes the mutual of PCM speech on the DSP of acoustic code circuit and wiring board.
FREESCALE communication processor MPC8280 selected by described master processor, run Vxworks operating system, it mainly completes the function such as configuration, control, monitoring to each plate, coordinate the terminal software on plug-in computer, realize the management to local side apparatus and monitoring function, the duties speech between remote equipment and office terminal of specifying can also be transmitted on request in real time simultaneously.Communication between master processor and office terminal completes via ethernet switching module.
Described acoustic code circuit is formed primarily of a slice TMS320VC5509 DSP, mainly complete the PCM encoding and decoding speech function of the 64K of telephone booth on voice and wiring board on plug-in computer, with the speech interface on plug-in computer by being connected with master processor MPC8280, be connected by the FPGA of logical circuit with the interface of wiring board.
Described logical circuit is formed primarily of a slice EP2C8Q208I8 fpga chip, some state controlling functions alternately and on master control borad of the DSP mainly completing acoustic code circuit and PCM speech on wiring board.
Described ethernet switching module realizes the link layer function of exchange of each circuit plate and master processor and external network, it is formed by the cascade of two panels 8 port one 00M exchange chip, the actual port used is 13 (each circuit plate two, master processor one, external interfaces two).
The SHDSL signal of described each SHDSL line function resume module two covered wires, its core is two panels SHDSL chip, for line receiver direction, grouping information wherein delivers to Ethernet exchanging matrix through ethernet physical layer interface chip by base plate, three channel time slot information Zhong mono-tunnel duties words are delivered to the master processor of master control borad by pcm bus by the clock request of master control borad by programming device, two-way telephone signal delivers to telephone wire via telephony interface chip (SLIC/CO is configurable).In pcm bus between line function module and main control module except the PCM speech talked about containing above-mentioned duties, every plate also arranges a road HDLC control information, is mainly used in the configuration information and line status etc. of transmission lines plate.
Contrast Fig. 3, described remote equipment, its structure comprises A transformer, the signal input/output end of this A transformer is corresponding with the first signal input/output terminal of a PEF24628 SHDSL module to connect, the secondary signal input/output terminal of the one PEF24628 SHDSL module is corresponding with the first signal input/output end of the first ethernet PHY chip to connect, the secondary signal input/output end of the first ethernet PHY chip is corresponding with the first signal input/output terminal of B transformer to connect, the secondary signal input/output terminal of B transformer is corresponding with the signal input/output end of Ethernet to connect,
3rd signal input/output terminal of the one PEF24628 SHDSL module is corresponding with the first signal input/output end of a LPC1768 ARM to connect, the secondary signal input/output end of the one LPC1768 ARM is corresponding with the first signal input/output terminal of an EPM3256CPLD to connect, one LPC1768 ARM also has two road signals, a road signal wherein connects debug serial port, and another road signal connects display port;
4th signal input/output terminal of the one PEF24628 SHDSL module is corresponding with the secondary signal input/output end of an EPM3256CPLD to connect;
The 3rd signal input/output end of the one EPM3256CPLD is corresponding with the first signal input/output terminal of digital junction to connect, the signal output part of digital junction is corresponding with the signal input part of C transformer to connect, and the signal input/output end correspondence of C transformer connects E1 digital junction;
Fourth, fifth, the six signal input/output ends of the one EPM3256CPLD are corresponding with the first signal input/output terminal of a SLIC/CO, the 2nd SLIC/CO, Three S's LIC/CO respectively to connect.
Described PEF24628 SHDSL module is the SHDSL modem chip of a LANTIQ, it is connected with ethernet PHY chip by MII mouth, be connected with CPLD by TDM mouth, LPC1768 selected by master controller, by memory interface and the SHDSL module communication of Simulation with I ntel, the run time version of SHDSL chip is downloaded; Remote equipment data are sent to from end by twisted-pair feeder, modem chip is entered by SHDSL transformer, chip is sent out by different data-interfaces after data demodulates, enter LAN mouth by MII mouth and carry out Ethernet data communication, CPLD is entered by TDM, CPLD carries out sequence control, and data are spread out of by E1 digital junction and spread out of by three road SLIC/CO phone modules with speech; CPLD holds a concurrent post SLIC/CO module dislodging machine simultaneously and controls; Data transfer logic is as follows: first ensure No. three telephone communications, and each road phone arranges 1 time slot, totally 3 time slots, and each SLIC/CO module flexible configuration is magnetite, user and relay function, separately has 1 telephone configuration time slot, and phone occupies 4 time slots altogether; Secondly, when transmission bandwidth is set to 2M, select the transmission means of Ethernet or E1 digital junction according to user, the two selects one, E1 digital junction to be 32 time slots, 2M data bandwidth, and when user's select tape is wider than or is less than 2M, data are transmitted from ethernet link; LPC1768 ARM draws RS-232 serial ports, and user is configured whole transmission state by RS-232 serial ports, and carries out monitoring current ink break-make, signal noise ratio of line, decay, line bandwidth to link.
Contrast accompanying drawing 4, the structure of described repeating equipment comprises D transformer, the signal input/output end of this D transformer transformer is corresponding with the first signal input/output terminal of the 2nd PEF24628 SHDSL module to connect, the secondary signal input/output terminal of the 2nd PEF24628 SHDSL module is corresponding with the first signal input/output end of the second ethernet PHY chip to connect, the secondary signal input/output end of the second ethernet PHY chip is corresponding with the first signal input/output terminal of E transformer to connect, the secondary signal input/output terminal of E transformer connects by Ethernet is corresponding with the first signal input/output terminal of F transformer,
3rd signal input/output terminal of the 2nd PEF24628 SHDSL module is corresponding with the first signal input/output end of the 2nd LPC1768 ARM to connect, the secondary signal input/output end of the 2nd LPC1768 ARM is corresponding with the first signal input/output terminal of the 2nd EPM3256 CPLD to connect, 2nd LPC1768 ARM also has two road signals, a road signal wherein connects debug serial port, and another road signal connects display port;
4th signal input/output terminal of the 2nd PEF24628 SHDSL module is corresponding with the secondary signal input/output end of the 2nd EPM3256 CPLD to connect;
The 3rd signal input/output end of the 2nd LPC1768 ARM is corresponding with the first signal input/output terminal of the 3rd PEF24628 SHDSL module to connect, and the 3rd signal input/output end of the 2nd EPM3256 CPLD is corresponding with the secondary signal input/output terminal of the 3rd PEF24628 SHDSL module to connect;
3rd signal input/output terminal of the 3rd PEF24628 SHDSL module is corresponding with the signal input/output end of G transformer to connect;
4th signal input/output terminal of the 3rd PEF24628 SHDSL module is corresponding with the first signal input/output end of three-ethernet PHY chip to connect, and the secondary signal input/output end of three-ethernet PHY chip is corresponding with the first signal input/output terminal of F transformer to connect.
Described PEF24628 SHDSL module adopts two panels modem chip, modulation /demodulation data enter repeating equipment from end by twisted-pair feeder, data are entered Ethernet Circle from end by a slice SHDSL chip MII mouth and enter by this repeating equipment, another sheet SHDSL chip MII mouth, by SHDSL chip, modulation /demodulation data are lived again, then sent by twisted-pair feeder; All being controlled by LPC1768ARM and EPM3256 CPLD of two panels SHDSL chip; Two panels SHDSL chip be set to one main one from, bandwidth is set to self adaptation, adapts to the bandwidth of far-end main equipment, and far-end main equipment connects repeating equipment from end, and far-end is from equipment connection repeating equipment main side.
Claims (5)
1. the broadband remote-transmission centralized control system based on multichannel SHDSL, it is characterized in that comprising M local side apparatus, a M repeating equipment and M remote equipment, wherein local side apparatus and remote equipment interconnected, repeating equipment is located between local side apparatus and remote equipment, between local side apparatus, cascade uses, form remote, broadband self-organizing local area network (LAN), described M=1,2.. N; Described local side apparatus, repeating equipment and remote equipment all use SHDSL modulation module; Local side apparatus, repeating equipment and remote equipment transmission bandwidth are that 128Kpbs to 8Mpbs is adjustable, and under light-duty insulate line, transmission range is 3.5Km to 15Km; A local side apparatus has the access capability of ten remote equipments, and local side apparatus controls break-make, the transmission bandwidth on any road in the remote equipment of ten tunnels accesses, and monitors the decay of any road transmission, signal to noise ratio, packet loss state; During the communication of SHDSL modulation module be one main one from; Described local side apparatus, its structure comprises 5 pieces of wiring boards, network board, master board, wherein every block wiring board has 2 road SHDSL interfaces, 4 road telephony interfaces, 2 road Ethernet interfaces, modulation-demodulation circuit, control circuit, each road SHDSL interface docks with a remote equipment, the Ethernet interface access network plate of 5 pieces of wiring boards, this network board comprises control circuit, switched circuit, wherein the control circuit of network board is made up of LPC1768 ARM chip, and switched circuit is formed primarily of two panels exchange chip 88E6095 cascade;
Network board Zhong mono-road Ethernet interface receives external management interface, another road Ethernet interface in network board receives master board, this master board has that two road signals are corresponding with the control circuit in 5 pieces of wiring boards to connect, master board also has a road signal to connect with display interface, external management interface access exterior PC in network board, the upper operation of PC has office terminal software, and the bandwidth on each road of software merit rating also shows the line status of every block SHDSL.
2. a kind of broadband remote-transmission centralized control system based on multichannel SHDSL according to claim 1, it is characterized in that described remote equipment, its structure comprises A transformer, the signal input/output end of this A transformer is corresponding with the first signal input/output terminal of a PEF24628 SHDSL module to connect, the secondary signal input/output terminal of the one PEF24628 SHDSL module is corresponding with the first signal input/output end of the first ethernet PHY chip to connect, the secondary signal input/output end of the first ethernet PHY chip is corresponding with the first signal input/output terminal of B transformer to connect, the secondary signal input/output terminal of B transformer is corresponding with the signal input/output end of Ethernet to connect,
3rd signal input/output terminal of the one PEF24628 SHDSL module is corresponding with the first signal input/output end of a LPC1768 ARM to connect, the secondary signal input/output end of the one LPC1768 ARM is corresponding with the first signal input/output terminal of an EPM3256CPLD to connect, one LPC1768 ARM also has two road signals, a road signal wherein connects debug serial port, and another road signal connects display port;
4th signal input/output terminal of the one PEF24628 SHDSL module is corresponding with the secondary signal input/output end of an EPM3256CPLD to connect;
The 3rd signal input/output end of the one EPM3256CPLD is corresponding with the first signal input/output terminal of digital junction to connect, the signal output part of digital junction is corresponding with the signal input part of C transformer to connect, and the signal input/output end correspondence of C transformer connects E1 digital junction;
Fourth, fifth, the six signal input/output ends of the one EPM3256CPLD are corresponding with the first signal input/output terminal of a SLIC/CO, the 2nd SLIC/CO, Three S's LIC/CO respectively to connect.
3. a kind of broadband remote-transmission centralized control system based on multichannel SHDSL according to claim 2, it is characterized in that described PEF24628 SHDSL module is the SHDSL modem chip of a LANTIQ, it is connected with ethernet PHY chip by MII mouth, be connected with CPLD by TDM mouth, LPC1768 selected by master controller, by memory interface and the SHDSL module communication of Simulation with I ntel, the run time version of SHDSL chip is downloaded; Remote equipment data are sent to from end by twisted-pair feeder, modem chip is entered by SHDSL transformer, chip is sent out by different data-interfaces after data demodulates, enter LAN mouth by MII mouth and carry out Ethernet data communication, CPLD is entered by TDM, CPLD carries out sequence control, and data are spread out of by E1 digital junction and spread out of by three road SLIC/CO phone modules with speech; CPLD holds a concurrent post SLIC/CO module dislodging machine simultaneously and controls; Data transfer logic is as follows: first ensure No. three telephone communications, and each road phone arranges 1 time slot, totally 3 time slots, and each SLIC/CO module flexible configuration is magnetite, user and relay function, separately has 1 telephone configuration time slot, and phone occupies 4 time slots altogether; Secondly, when transmission bandwidth is set to 2M, select the transmission means of Ethernet or E1 digital junction according to user, the two selects one, E1 digital junction to be 32 time slots, 2M data bandwidth, and when user's select tape is wider than or is less than 2M, data are transmitted from ethernet link; LPC1768 ARM draws RS-232 serial ports, and user is configured whole transmission state by RS-232 serial ports, and carries out monitoring current ink break-make, signal noise ratio of line, decay, line bandwidth to link.
4. a kind of broadband remote-transmission centralized control system based on multichannel SHDSL according to claim 1, it is characterized in that the structure of described repeating equipment comprises D transformer, the signal input/output end of this D transformer is corresponding with the first signal input/output terminal of the 2nd PEF24628 SHDSL module to connect, the secondary signal input/output terminal of the 2nd PEF24628 SHDSL module is corresponding with the first signal input/output end of the second ethernet PHY chip to connect, the secondary signal input/output end of the second ethernet PHY chip is corresponding with the first signal input/output terminal of E transformer to connect, the secondary signal input/output terminal of E transformer connects by Ethernet is corresponding with the first signal input/output terminal of F transformer,
3rd signal input/output terminal of the 2nd PEF24628 SHDSL module is corresponding with the first signal input/output end of the 2nd LPC1768 ARM to connect, the secondary signal input/output end of the 2nd LPC1768 ARM is corresponding with the first signal input/output terminal of the 2nd EPM3256 CPLD to connect, 2nd LPC1768 ARM also has two road signals, a road signal wherein connects debug serial port, and another road signal connects display port;
4th signal input/output terminal of the 2nd PEF24628 SHDSL module is corresponding with the secondary signal input/output end of the 2nd EPM3256 CPLD to connect;
The 3rd signal input/output end of the 2nd LPC1768 ARM is corresponding with the first signal input/output terminal of the 3rd PEF24628 SHDSL module to connect, and the 3rd signal input/output end of the 2nd EPM3256 CPLD is corresponding with the secondary signal input/output terminal of the 3rd PEF24628 SHDSL module to connect;
3rd signal input/output terminal of the 3rd PEF24628 SHDSL module is corresponding with the signal input/output end of G transformer to connect;
4th signal input/output terminal of the 3rd PEF24628 SHDSL module is corresponding with the first signal input/output end of three-ethernet PHY chip to connect, and the secondary signal input/output end of three-ethernet PHY chip is corresponding with the secondary signal input/output terminal of F transformer to connect.
5. a kind of broadband remote-transmission centralized control system based on multichannel SHDSL according to claim 4, it is characterized in that described PEF24628 SHDSL module adopts two panels modem chip, modulation /demodulation data enter repeating equipment from end by twisted-pair feeder, this repeating equipment is from holding data importing Ethernet Circle by a slice SHDSL chip MII mouth, another sheet SHDSL chip MII mouth, by SHDSL chip, modulation /demodulation data are lived again, then sent by twisted-pair feeder; All being controlled by LPC1768ARM and EPM3256 CPLD of two panels SHDSL chip; Two panels SHDSL chip be set to one main one from, bandwidth is set to self adaptation, adapts to the bandwidth of far-end main equipment, and far-end main equipment connects repeating equipment from end, and far-end is from equipment connection repeating equipment main side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310252177.6A CN103326746B (en) | 2013-06-24 | 2013-06-24 | Broadband remote-transmission centralized control system based on multiple SHDSLs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310252177.6A CN103326746B (en) | 2013-06-24 | 2013-06-24 | Broadband remote-transmission centralized control system based on multiple SHDSLs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103326746A CN103326746A (en) | 2013-09-25 |
| CN103326746B true CN103326746B (en) | 2014-12-24 |
Family
ID=49195307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310252177.6A Active CN103326746B (en) | 2013-06-24 | 2013-06-24 | Broadband remote-transmission centralized control system based on multiple SHDSLs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103326746B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341005B (en) * | 2018-11-30 | 2022-06-14 | 浙江宇视科技有限公司 | Quick-pass door control device and system |
| CN111245686B (en) * | 2020-03-10 | 2024-04-19 | 中国人民解放军32181部队 | Command vehicle system node monomer detection and diagnosis equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288300A (en) * | 1999-09-11 | 2001-03-21 | 广州市高科通信设备有限公司 | Intelligent basic communication station group circuit equipment |
| CN101540939A (en) * | 2008-12-10 | 2009-09-23 | 北京四通智能建筑***集成工程有限公司 | Design scheme and PCB drawing of VDSL2 broadband access module |
| CN101577765A (en) * | 2009-05-12 | 2009-11-11 | 北京佳讯飞鸿电气股份有限公司 | Line multiplexed communication equipment based on twisted pair, system and network thereof |
| CN203416254U (en) * | 2013-06-24 | 2014-01-29 | 南京华东电子集团有限公司 | Broadband remote transmission centralized control system based on multipath SHDSL |
-
2013
- 2013-06-24 CN CN201310252177.6A patent/CN103326746B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288300A (en) * | 1999-09-11 | 2001-03-21 | 广州市高科通信设备有限公司 | Intelligent basic communication station group circuit equipment |
| CN101540939A (en) * | 2008-12-10 | 2009-09-23 | 北京四通智能建筑***集成工程有限公司 | Design scheme and PCB drawing of VDSL2 broadband access module |
| CN101577765A (en) * | 2009-05-12 | 2009-11-11 | 北京佳讯飞鸿电气股份有限公司 | Line multiplexed communication equipment based on twisted pair, system and network thereof |
| CN203416254U (en) * | 2013-06-24 | 2014-01-29 | 南京华东电子集团有限公司 | Broadband remote transmission centralized control system based on multipath SHDSL |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103326746A (en) | 2013-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100515100C (en) | System and method for exchanging modules in switch | |
| CN100555917C (en) | Optical transferred synthetized accessing PDH device in multiple services | |
| CN103326746B (en) | Broadband remote-transmission centralized control system based on multiple SHDSLs | |
| CN1053306C (en) | Mixed style comprehensive business connecting net work equipment and method for forming the net work | |
| CN103297636B (en) | A kind of based on SHDSL multicast communication device systems and method | |
| CN203416254U (en) | Broadband remote transmission centralized control system based on multipath SHDSL | |
| CN109039892A (en) | A kind of transmission method of business, the network equipment and network system | |
| CN203416314U (en) | Repeating equipment in broadband remote transmission centralized control system based on multipath SHDSL | |
| CN203416274U (en) | Central office equipment in broadband remote transmission centralized control system based on multipath SHDSL | |
| CN202713353U (en) | Packet transport network device | |
| CN101355601B (en) | Network official telephone for digital microwave system and implementing method thereof | |
| CN203416317U (en) | Remote equipment in broadband remote transmission centralized control system based on multipath SHDSL | |
| CN203618007U (en) | Multichannel Ethernet cable extender main terminal with optical port | |
| CN208174713U (en) | A kind of multi-functional communications all-in-one machine | |
| CN101132284A (en) | Internet communication device | |
| CN203416316U (en) | Line control unit in multipoint transmission equipment system based on SHDSL | |
| CN203416255U (en) | Control unit in multipoint transmission equipment system based on SHDSL | |
| RU2261530C2 (en) | Unified shipboard communication system | |
| CN203416318U (en) | Network main processor in multipoint transmission equipment system based on SHDSL | |
| CN203416315U (en) | Multipoint transmission equipment system based on SHDSL | |
| CN207926824U (en) | A kind of cross channel device for Digital Distribution Frame | |
| CN101577765B (en) | Line multiplexed communication equipment based on twisted pair, system and network thereof | |
| CN1232073C (en) | Method and equipment for implementing service interchanging between subnet of synchronous digital transmission system | |
| CN108174312B (en) | VDF intelligent crossing device and crossing method thereof | |
| CN101909128B (en) | Communication system and corresponding communication method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |