CN201388236Y - Dual-network exchange communication device - Google Patents
Dual-network exchange communication device Download PDFInfo
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- CN201388236Y CN201388236Y CN200920012172U CN200920012172U CN201388236Y CN 201388236 Y CN201388236 Y CN 201388236Y CN 200920012172 U CN200920012172 U CN 200920012172U CN 200920012172 U CN200920012172 U CN 200920012172U CN 201388236 Y CN201388236 Y CN 201388236Y
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Abstract
The utility model relates to a dual-network exchange communication device which belongs to the field of communication, and is characterized by comprising a wireless board, an inner wire board, an outer wire board, a seat board and two exchange boards; the wireless board, the inner wire board and the outer wire board respectively lead out two communication network data lines which are connected with the two exchange boards; and the two exchange boards are parallelly connected and then connected with the seat board by the communication network data lines. The dual-network exchange communication device has simple and reasonable equipment and strong practicality, and is quite suitable to be applied to the field of civil aviation.
Description
Technical field:
The utility model provides a kind of communication system that is applied to Civil Aviation System, relates in particular to a kind of two net exchange communication device.
Background technology:
Communication system is a most important link in civil aviaton's production run, for a long time, China master has not only spent national a large amount of foreign exchange with communication equipment dependence on import mostly, and inlet system in use also exposes problems such as capacity is little, poor compatibility, function singleness; And in traditional communication system, the radio station is directly to be connected with remote-control box, carry out radio communication, it all is that radio station directly is connected with remote-control box that phone carries out wire communication, carry out radio communication, link to each other one to one between the phone and carry out wire communication, remote-control box and phone are then formed the control seat, like this, if desired with carrying out wired and controlled in wireless in many ways, then just need be at a seat end configuration multi-section remote-control box and phone, so the seat arrangement abnormalities is numerous and diverse, has all brought great inconvenience for operation and maintenance.Communication in the past is that single line connects in addition, interrupts in case connect, and will cause the paralysis of whole system, and communication system in the past is wiredly to separate control, poor compatibility, function singleness with wireless system; And communication system in the past adopts a device to use a unified central processing unit, like this, in case this processor damages, will influence the use of whole device.
Summary of the invention:
Goal of the invention: the invention provides a kind of two exchange communication device of netting, its objective is the problem that solution communication system seat in the past disposes complexity, poor compatibility, the failure rate height that causes because single line connects and safeguards inconvenience.
Technical scheme: the present invention is achieved through the following technical solutions:
A kind of two net exchange communication device, it is characterized in that: described communication device comprises wireless plate, interior lines plate, outside line plate, seat plate and two power boards; Wireless plate, interior lines plate and outside line plate are all drawn two communication network data wires and are connected to two power boards respectively, and two power boards then are connected in parallel to the seat plate by the communication network data wire.
Described pair of net switching plane also includes monitor board, GPS plate, voice plate, recording plate and magnetite plate; Monitor board, GPS plate, voice plate, recording plate are connected with two power boards by two parallel communication network data wires with the magnetite plate.
On described wireless plate, interior lines plate, outside line plate, seat plate, be provided with audio frequency isolated converter, digital isolator, two network-driven modules and independent CPUs and FPGA; Two network drives are connected with CPU by circuit, and CPU is connected with FPGA by circuit, and FPGA is connected with the audio frequency isolated converter by digital to analog converter on the one hand, directly is connected with digital isolator on the other hand; Audio frequency isolated converter and digital isolator are connected to port for peripheral equipment, and two network-driven modules then are connected to two power boards by the communication network data wire.
Described power board is provided with a plurality of interfaces that are connected with each feature board, and total interface all is connected with crosspoint with digital isolator by the audio frequency isolated converter, and crosspoint is connected with control and Routing Protocol judge module.
Digital isolator adopts photoelectrical coupler and relay.
The outward appearance of described two net exchange communication devices is the housing that an inside has the integrated circuit board slot, described wireless plate, interior lines plate, outside line plate, seat plate, monitor board, GPS plate, voice plate, recording plate, magnetite plate and power board all are arranged in the housing and are plugged on side by side in the integrated circuit board slot, and two power boards are plugged on the two ends of integrated circuit board slot.
Wireless plate is connected with the VHF VHF radio in use; The interior lines plate is connected with the direct connection telephone machine in use; The outside line plate is connected with local telephone network or stored-program control exchange in use; The seat plate is connected with user seat by the seat end plaste in use.
Advantage and effect: the utility model provides a kind of two net exchange communication device, this communication device is with wireless plate, the interior lines plate, the outside line plate, the seat plate, the seat end plaste, monitor board, the GPS plate, the voice plate, recording plate and magnetite plate, link together by two parallel network data lines by two parallel communication network data wires and two power boards, form communication platform, this exchange communication device in use, wireless plate is connected with outside VHF VHF radio, interior lines plate 4 is connected with the direct connection telephone machine, the outside line plate is connected with local telephone network or stored-program control exchange, the seat end plaste is connected with user seat, and monitor board is used for being connected with monitoring configurating terminal machine; The GPS plate is connected with external clock reference; The voice plate then is used for the voice messaging to each corresponding function plate transmission of dual network crosspoint; The recording plate then is used for this locality recording at long-range seat; Magnetite plate 13 is used for being connected with magnetite or power supply phone.Just each feature board can be linked to each other with the seat by power board so in use, radio communication can be carried out in same seat also can carry out wire communication, and all than simple, convenient, fail safe also improves thereupon greatly in operation and maintenance.
This pair net exchange communication device in use, by dual network seat and wireless device and straight-through phone are coupled together, such exchanges data is unblocked, system is stable, and easy and simple to handle, wire communication and wireless telecommunications on each two net exchange communication device can freely be changed by a seat.Dropped into since the experiment, none routine systemic breakdown phenomenon takes place, and reliability is significantly improved, for ensureing that flight safety provides strong support;
Two net exchange communication devices adopt the decentralized control structure, with the radio function plate is example, there is not CPU in the main frame, all functions are controlled by separate CPU on each feature board and FPGA, the decentralized control structure can be limited in fault in the minimum scope, the fault of any feature board can not influence the normal operation of whole system, and reliability is significantly improved.
On each feature board of two net exchange communication devices, all be integrated with two full switching network redundancy runnings of isolating each other.
When this pair net exchange communication device uses, after the external voice information via analog-to-digital conversion, exchange with two communication networks of the auspicious form of data by inside, design broadband (10M) uses broadband (128K) than reaching 10: 0.128 with reality, effectively raise the exchanges data reliability, can really accomplish clog-free communication.
Full redundancy network parallel work that each feature board of this pair of net exchange communication device is all integrated, between any two feature boards, provide the data exchange capability that is not less than 10Mpbs, and between multicomputer, exchange if desired, then only need by two parallel networks, will a plurality of these pairs nets exchange communication devices and couple together and get final product; The exchange rate of 100M, 1000M can be provided between these a plurality of this pair net switching planes.
Be accompanied by rapid development of network technology now, this pair net exchange communication device will have very powerful dilatation ability.Under such exchange capacity, attend a banquet, the quantity of various interface such as analog subscriber, digital subscriber almost is can unconfined dilatation.
Because this pair net exchange communication device adopts different communications protocol, and much imported product is not that data transaction agreement and technology are provided, and therefore has very big difficulty when multisystem interconnects.The communication protocol of native system independent development can make the communication protocol between the different platform change mutually, and and different product between have very strong compatibility.
This pair of net exchange communication device can external domestic employed various VHF, HF, transposer station, wireless talkback and various ground wire communication facility at present, and the normal operation of these equipment is directly connected to safety of civil aviation production.In case owing to native system internal fault reason causes damage to access device, its loss is beyond measure.Therefore, each feature board of native system has carried out whole isolation to all input/output ports when design.By the audio frequency isolated converter all audio frequency input/output signals (RX, TX and telephone signal) are isolated; By photoelectrical coupler and relay digital signal (PTT, SQL, ALM) is isolated.Adopt the full access way of isolating,, also can not produce any influence, but improve the global reliability and the fail safe of beechnut effectively the equipment such as very high frequency(VHF) that insert even can guarantee when catastrophe failure appears in native system.
The interface of each feature board of this pair of net exchange communication device adopts self-adapting type.When external equipment inserted, the polarity and the level of CPU on each feature board and the automatic judgment signal of FPGA meeting were handled by standard control signal of output after inner polarity and the level conversion.To the output signal of system, each feature board carries out intelligentized processing equally, makes output signal satisfy the needs of access device.This processing mode, can satisfy the ground connection/dry contact of digital signal /+5V/+12V/-48V etc., greatly facilitate the connection of different agreement very high frequency(VHF) equipment, improved the adaptive capacity of system.
This pair of net exchange communication device adopts the separate CPU decentralized control, and high performance 32 intelligent processors (CPU) NIOSII is all arranged on the every feature board, is used for handling the function such as synthetic of the collection of redundant communications protocol, audio frequency and audio frequency.In whole application and maintenance process, the scattered control system structure can be limited in fault in the minimum scope, and the fault of any feature board can not influence the normal operation of whole system.System reliability is compared and adopted the system of traditional core host computer control mode that further raising has been arranged, and is stable, provides powerful support for for ensureing that flight safety provides.
The efficiently property tieed up of this product be mainly reflected in following some:
1, integrated circuit board hot plug.Any integrated circuit board (comprising power board), all hot-swappable under the energising running status, make things convenient for the user under the situation that does not influence use, to safeguard.
2, comprehensive in-service surveillance controlling platform.The information of any one data in can detection system, the failure judgement of intelligence also has sound and light alarm.
3, the full redundancy of switching system design.Make and to close or to pull up any one power board in the custom system use and exchange, and do not influence the normal use of system.
4, this pair net exchange communication device has improved the shortcoming of imported product possessing on the basis of high reliability for the user saves large quantities of funds.
When having disposed active and standby two radio station of same frequency on same seat, if mainly break down (ALARM alarm) with the radio station, system can automatically switch to stand by station and receive and dispatch.Even just in communication process, hostdown also can unremittingly switch to standby host to the user, this action almost is imperceptible concerning the recipient, and the user can also come active and standby machine is distinguished by the size of regulating volume.This pair net exchange communication device can also be formed videoconference in addition.
The utility model, equipment are succinctly reasonable, and be practical, relatively is fit to be applied in the civil aviaton field.
Description of drawings:
The structural representation of the occupation mode when Fig. 1 links together for a plurality of the utility model;
Fig. 2 represents the utility model internal structure block diagram;
Fig. 3 represents the structured flowchart of the another kind of form of internal structure of the present utility model;
Fig. 4 represents the structured flowchart of the wireless plate of the utility model;
Fig. 5 represents the circuit board figure of the wireless plate of the utility model;
Fig. 6 represents the circuit board figure that has the wireless plate of audio frequency isolated converter of the present utility model;
Fig. 7 represents the partial sectional view of the utility model external overall structure;
Fig. 8 represents the structural principle schematic block diagram of the utility model power board.
Embodiment:
Below in conjunction with accompanying drawing the utility model is described further:
Shown in Fig. 2 and 3, the utility model provides a kind of two net exchange communication device, and described two net exchange communication devices mainly comprise wireless plate 3, interior lines plate 4, outside line plate 5, seat plate 6, seat end plaste 7 and two power boards 8; As shown in Figure 2, wireless plate 3, interior lines plate 4 and outside line plate 5 are connected with two power boards 8 by two inner parallel communication network data wires, and 8 of two power boards are by being connected to seat plate 6 after two parallel communication network data wire parallel connections; Seat plate 6 connects seat end plaste 7; Wireless in use plate 3 is connected with outside VHF VHF radio by port for peripheral equipment, and interior lines plate 4 also is connected with the direct connection telephone machine by port for peripheral equipment, and the outside line plate is connected with local telephone network or stored-program control exchange, and seat end plaste 7 is connected with user seat 14; Like this a user seat 14 just can be realized wired and controls wireless telecommunications, makes simple and effective that the configuration at seat becomes
Described two net exchange communication device also includes monitor board 9, GPS plate 10, voice plate 11, recording plate 12 and magnetite plate 13; Monitor board 9, GPS plate 10, voice plate 11, recording plate 12 are connected with two power boards 8 by two inner communication network data wires with magnetite plate 13; In use, monitor board 9 is used for being connected with monitoring configurating terminal machine; GPS plate 10 is connected with external clock reference; Voice plate 11 then is used for the voice messaging to each corresponding function plate transmission of dual network crosspoint 2; 12 of plates of recording are used for this locality recording at long-range seat; Magnetite plate 13 is used for being connected with magnetite or power supply phone;
So just realize switch transition freely with coupling together between user seat and 14 each feature boards by two power boards 8.
In addition, on described wireless plate 3, interior lines plate 4, outside line plate 5, seat plate 6, monitor board 9, voice plate 11, recording plate 12 and magnetite plate 13, be provided with CPU18, FPGA19 and audio frequency isolated converter 21, digital isolator 23 and two network-driven modules 20; Network-driven module 20 is used for being connected with two communication network data wires and then being connected to power board 8 in use; Network-driven module 20 is connected with CPU by circuit, and CPU is connected with FPGA by circuit, and FPGA then is connected with audio frequency isolated converter 21 by two opposite analog to digital converters 22 of conversion direction on the one hand, is connected with digital isolator on the other hand; Audio frequency isolated converter 21, digital isolator 23 are connected with the port; FPGA is exactly a field programmable gate array.
10 of GPS plates include CPU and two network-driven modules, and the network-driven module is connected to CPU by circuit, and CPU then is connected with serial ports.
Shown in Fig. 4,5 and 6, with wireless plate 3 is example, the internal structure of each feature board is described, wireless plate 3 comprises two network drives 20, CPU, FPGA, audio frequency isolated converter, digital isolator and wave point, described two network drives 20, CPU, FPGA, audio frequency isolated converter, digital isolator all are arranged on the printed circuit board (PCB), two network drives 14 are connected with CPU by circuit, and CPU is connected with FPGA by circuit, and CPU and FPGA form control unit; FPGA is connected with the audio frequency isolated converter by the DA transducer on the one hand, then be connected on the other hand with digital isolator, audio frequency isolated converter, digital isolator then are connected with radio port, in use, radio port carries out audio data collecting, then through behind audio frequency isolated converter and the digital isolator data are transferred to CPU after through the DA conversion, FPGA handles, transfer out by two network drives 14 then.
As shown in Figure 8, be the structural principle simple block diagram of power board 8, on power board 8, then be provided with a plurality of ports and be used for being connected with each feature board.Each port of power board 8 all is connected to crosspoint by audio frequency isolated converter and digital isolator, and crosspoint is connected by the agreement judge module with control and land; Information enters crosspoint and control and land by handling in the agreement judge module after being isolated through digital and audio frequency by corresponding ports, transfers out again.Power board 8 internal informations enter crosspoint and control and land by handling in the agreement judge module after isolating through digital and audio frequency, transfer out again.
Shown in Fig. 4,5 and 6, be the aufbauprinciple of wireless plate 3 in addition.Be illustrated in figure 3 as the simple block diagram of the utility model type of attachment, demonstrated the be connected situation of each feature board with power supply among the figure, each feature board is identical with existing known circuit board with the connection situation of power supply, here repeats no more.
As shown in Figure 7, the outward appearance of described two net exchange communication devices is the housing 14 that an inside has integrated circuit board slot 24, described wireless plate 3, interior lines plate 4, outside line plate 5, seat plate 6, monitor board 9, GPS plate 10, voice plate 11, recording plate 12, magnetite plate 13 and power board all are arranged in the housing and are plugged on side by side in the integrated circuit board slot 15, two power boards 8 are plugged on the two ends of integrated circuit board slot 15, various external equipments such as VHF, HF, transposer station, wireless talkback and various ground wire communication facility all exchange hungry feature board corresponding in the communication device by circuit and this pair net and connect.
The structural representation of the occupation mode when Fig. 1 links together for a plurality of the utility model;
Because this pair of net exchange communication device can external domestic employed various VHF, HF, transposer station, wireless talkback and various ground wire communication facility at present, and the normal operation of these equipment is directly connected to safety of civil aviation production.In case owing to this pair net exchange communication device internal fault reason causes damage to access device, its loss is beyond measure.Therefore, each feature board of this pair net exchange communication device has carried out whole isolation to all input/output ports when design.By the audio frequency isolated converter all audio frequency input/output signals (RX, TX and telephone signal) are isolated; By digital isolator, just photoelectrical coupler or relay are isolated digital signal (PTT, SQL, ALM).Adopt full isolation access way, when catastrophe failure appears in this pair net exchange communication device, also can not produce any influence, but improve the global reliability and the fail safe of beechnut effectively the equipment such as very high frequency(VHF) that insert even can guarantee.
Adopt self-adapting type during the interface of this pair of net exchange communication device.When external equipment inserted, the polarity and the level of CPU on each feature board and the automatic judgment signal of FPGA meeting were handled by standard control signal of output after inner polarity and the level conversion.To the output signal of system, each feature board carries out intelligentized processing equally, makes output signal satisfy the needs of access device.This processing mode, can satisfy the ground connection/dry contact of digital signal /+5V/+12V/-48V etc., greatly facilitate the connection of different agreement very high frequency(VHF) equipment, improved the adaptive capacity of system.
The utility model by each feature board Information Monitoring, is passed to user seat by power board with information then and handles in use.
After adopting this pair net exchange communication device, radio station 17 links to each other with two net exchange communication devices, improved user seat 14 also directly links to each other with interior lines plate 4 with wireless plate 3 by power board 8, same user seat 14 can carry out radio communication also can carry out wire communication, operation and maintenance is all than simple, convenient, fail safe also improves thereupon greatly, has effectively ensured flight safety.
Because on each feature board of this pair net exchange communication device, all be integrated with two full switching network redundancy runnings of isolating each other.
After the external voice information via analog-to-digital conversion, the form auspicious with data exchanges by these two networks, design broadband (10M) uses broadband (128K) than reaching 10: 0.128 with reality, effectively raises the exchanges data reliability, really accomplishes clog-free communication.
This pair of net exchange communication device adopts redundant full switching network framework that a plurality of identical two net switching planes are linked together when using, two net concurrent workings, can carry out dilatation easily, and make that more reasonable, the interregional contact of the utilization of resources is tightr, really accomplish clog-free communication, at present, the native system capacity surpasses international similar system heap(ed) capacity more than 2 times.
Full redundancy network parallel work that the feature board of this pair net exchange communication device is all integrated provides the data exchange capability that is not less than 10Mpbs between any two feature boards; If desired a plurality of this pair net switching planes are linked together then only two parallel switching networks to be connected with the power board of each two net switching plane and get final product, the exchange rate of 100M, 1000M can be provided, be accompanied by rapid development of network technology now, this pair net switching plane will have very powerful dilatation ability.Under such exchange capacity, attend a banquet, the quantity of various interface such as analog subscriber, digital subscriber almost is can unconfined dilatation.
This pair of net exchange communication device adopts the separate CPU decentralized control, and high performance 32 intelligent processors (CPU) NIOSII is all arranged on the every feature board, is used for handling the function such as synthetic of the collection of redundant communications protocol, audio frequency and audio frequency.In whole application and maintenance process, the scattered control system structure can be limited in fault in the minimum scope, and the fault of any feature board can not influence the normal operation of whole system.System reliability is compared and adopted the system of traditional core host computer control mode that further raising has been arranged, and is stable, provides powerful support for for ensureing that flight safety provides.
The efficiently property tieed up of this product be mainly reflected in following some: 1, integrated circuit board hot plug.Any integrated circuit board (comprising power board), all hot-swappable under the energising running status, make things convenient for the user under the situation that does not influence use, to safeguard.2, comprehensive in-service surveillance controlling platform.The information of any one data in can detection system, the failure judgement of intelligence also has sound and light alarm.4, the full redundancy of switching system design.Make and to close or to pull up any one power board in the custom system use and exchange, and do not influence the normal use of system.5, the complete independent development of native system possessing on the basis of high reliability for the user saves large quantities of funds, has improved the shortcoming of imported product.In addition, this pair net exchange communication device can also be realized active and standby VHF radio seamless switching, that is to say when on same seat, having disposed active and standby two radio station of same frequency, if the master is broken down (ALARM alarm) with the radio station, system can automatically switch to stand by station and receive and dispatch.Even just in communication process, hostdown also can unremittingly switch to standby host to the user, this action almost is imperceptible concerning the recipient, and the user can also come active and standby machine is distinguished by the size of regulating volume.
This pair net exchange communication device in use, as shown in Figure 1, if the full switching network medium of a plurality of these pairs net exchange communication devices by the outside connected then can form the videoconference of 256*64 member's capacity, can store nearly 256 videoconferences in the videoconference, can hold 64 members in the group and carry out meeting.System is gradable to carry out meeting, also can organize more and carry out meeting simultaneously, and every group of conference member number of making a speech simultaneously can reach 4 sides.Pass through conference call functions, can preestablish a plurality of call service groups, can call out whole phones in this group simultaneously by a key operation, this function is also very practical for notice to navigator, announcement information issue etc., and described full switching network medium can adopt local area network (LAN) VLAN networking, wide area network VPN, the DDN special line, wireless bridge, netting twine, twisted-pair feeder, optical fiber, coaxial cable etc.And in this pair net exchange communication device, also can form a small-sized videoconference.
The utility model, equipment are succinctly reasonable, and be practical, relatively is fit to be applied in the civil aviaton field.
Claims (7)
1, a kind of two net exchange communication device, it is characterized in that: described communication device comprises wireless plate (3), interior lines plate (4), outside line plate (5), seat plate (6) and two power boards (8); Wireless plate (3), interior lines plate (4) and outside line plate (5) are all drawn two communication network data wires and are connected to two power boards (8) respectively, and two power boards (8) then are connected in parallel to seat plate (6) by the communication network data wire.
2, two net exchange communication device according to claim 1, it is characterized in that: described pair of net switching plane also includes monitor board (9), GPS plate (10), voice plate (11), recording plate (12) and magnetite plate (13); Monitor board (9), GPS plate (10), voice plate (11), recording plate (12) are connected with two power boards (8) by two parallel communication network data wires with magnetite plate (13).
3, two net exchange communication device according to claim 2 is characterized in that: be provided with audio frequency isolated converter, digital isolator, two network-driven modules and independent CPUs and FPGA on described wireless plate (3), interior lines plate (4), outside line plate (5), seat plate (6); Two network drives (14) are connected with CPU by circuit, and CPU is connected with FPGA by circuit, and FPGA is connected with the audio frequency isolated converter by digital to analog converter on the one hand, directly is connected with digital isolator on the other hand; Audio frequency isolated converter and digital isolator are connected to port for peripheral equipment, and two network-driven modules then are connected to two power boards (8) by the communication network data wire.
4, two net exchange communication device according to claim 2, it is characterized in that: described power board is provided with a plurality of interfaces that are connected with each feature board, total interface all is connected with crosspoint with digital isolator by the audio frequency isolated converter, and crosspoint is connected with control and Routing Protocol judge module.
5, according to claim 3 or 4 described two net exchange communication devices, it is characterized in that: digital isolator adopts photoelectrical coupler and relay.
6, two net exchange communication device according to claim 1, it is characterized in that: the outward appearance of described two net exchange communication devices is the housing (14) that an inside has integrated circuit board slot (15), described wireless plate (3), interior lines plate (4), outside line plate (5), seat plate (6), monitor board (9), GPS plate (10), voice plate (11), recording plate (12), magnetite plate (13) and power board all are arranged in the housing and are plugged on side by side in the integrated circuit board slot (15), and two power boards (8) are plugged on the two ends of integrated circuit board slot (15).
7, two net exchange communication device according to claim 1, it is characterized in that: wireless plate (3) is connected with the VHF VHF radio in use; Interior lines plate (4) is connected with the direct connection telephone machine in use; Outside line plate (5) is connected with local telephone network or stored-program control exchange in use; Seat plate (6) is connected with user seat by seat end plaste (7) in use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920012172U CN201388236Y (en) | 2009-03-20 | 2009-03-20 | Dual-network exchange communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920012172U CN201388236Y (en) | 2009-03-20 | 2009-03-20 | Dual-network exchange communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201388236Y true CN201388236Y (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920012172U Expired - Fee Related CN201388236Y (en) | 2009-03-20 | 2009-03-20 | Dual-network exchange communication device |
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| CN (1) | CN201388236Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733723A (en) * | 2017-11-22 | 2018-02-23 | 沈阳空管技术开发有限公司 | Double net cable communication system hosts |
-
2009
- 2009-03-20 CN CN200920012172U patent/CN201388236Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733723A (en) * | 2017-11-22 | 2018-02-23 | 沈阳空管技术开发有限公司 | Double net cable communication system hosts |
| CN107733723B (en) * | 2017-11-22 | 2023-10-17 | 沈阳空管技术开发有限公司 | Double-network wire communication system host |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20170320 |
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| CF01 | Termination of patent right due to non-payment of annual fee |