CN202634439U - Four-port gigabit optical fiber multi-service integrated transmission equipment - Google Patents
Four-port gigabit optical fiber multi-service integrated transmission equipment Download PDFInfo
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- CN202634439U CN202634439U CN 201220242046 CN201220242046U CN202634439U CN 202634439 U CN202634439 U CN 202634439U CN 201220242046 CN201220242046 CN 201220242046 CN 201220242046 U CN201220242046 U CN 201220242046U CN 202634439 U CN202634439 U CN 202634439U
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Abstract
The utility model provides four-port gigabit optical fiber multi-service integrated transmission equipment, belonging to the technical field of electronics and electronic integrated circuits. The four-port gigabit optical fiber multi-service integrated transmission equipment comprises a chassis, a mainboard, a power supply tray, a first business expansion board and a second business expansion board, wherein the power supply tray, the mainboard, the first business expansion board and the second business expansion board are placed in the chassis, the power supply tray is used for converting alternating current (AC) of 220V or direct current (DC) of -48V into the DC of +5V and then supplying power to the mainboard, the signals of four Ethernet interfaces 1000M, eight interfaces E1, an interface RS232 (Recommended Standard), the first business expansion board and the second business expansion board are comprehensively multiplexed together and then converted into optical signals by the mainboard, and then, the optical signals are transmitted through optical fibers. The four-port gigabit optical fiber multi-service integrated transmission equipment provided by the utility model has the advantages that multiple services can be transmitted through one optical cable, and the integration of multiple services is realized, so that optical fiber resources are saved, and the user construction cost and equipment maintenance cost are lowered.
Description
Technical field
The utility model relates to electronics and electronic integrated circuit technical field, relates in particular to a kind of 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber.
Background technology
Optical transmission is the technology of between transmit leg and recipient, transmitting with the light signal form.
Synchronous optical network (Synchronous Optical Network, SONET) and synchronous digital hierarchy (Synchronous Digital Hierarchy, SDH): (the former is a Unite States Standard to a kind of Optical Fiber Transmission system; Be used for north America region; The latter is an international standard), (STM-1 155Mbps) is basic conception with Synchronous Transport Module level-N for it; Its module is made up of information payload, section overhead, Administrative Unit Pointer, and its outstanding feature is to utilize the compatible various PDH systems of virtual container mode.
PDH (Plesiochronous Digital Hierarchy, PDH): a kind of Digital Transmission system before SONET/SDH occurs, non-Optical Fiber Transmission main flow equipment.Mainly be for voice communication designs, do not have worldwide unified standardized digital signal speed and frame structure, the international difficulty that interconnects.
Present optical transmission device transport service is single, often only transmits a kind of business.Only transmit Ethernet service like fiber optical transceiver, the PDH optical transceiver only transmits the E1 business, and PCM equipment only transmits telephone service.When the user needs multiple business, often need use many stacks of plurality of devices could satisfy business demand, the network of building is so not only wasted fiber resource, has also improved user's construction cost and maintenance cost greatly.
Therefore, need a urgent technical problem that solves to be exactly instantly: how can propose a kind of effective measures, to solve the problem that exists in the prior art.
The utility model content
The utility model technical problem to be solved provides a kind of 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber; Realize that an optical cable can transmit multiple business; Realization multi-service unification, thus fiber resource practiced thrift, reduce user's construction cost and service equipment cost.
In order to solve the problems of the technologies described above, the utility model provides a kind of 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber, a kind of 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber; Comprise cabinet, mainboard, power supply disks, the first professional expansion board and the second professional expansion board; Wherein, be placed with power supply disks in the cabinet, mainboard, the first professional expansion board and the second professional expansion board; Power supply disks with the 220V alternating current or-the 48V direct current converts to+be main board power supply behind the 5V direct current; Mainboard is the Ethernet interface of 4 road 1000M, 8 road E1 interfaces, 1 road RS232 interface; The signal synthesis of the first professional expansion board, the second professional expansion board is multiplexing to convert light signal into after together, passes through Optical Fiber Transmission again.
Further, connect through electric power connection line between said power supply disks and the mainboard.
Further, be connected through the Ou Pin connector between said mainboard and the first professional expansion board.
Further, be connected through the Ou Pin connector between said mainboard and the second professional expansion board.
Further, the business that provides of the said first professional expansion board comprises trunk call, subscriber phone, hotline, magnetic telephone, E/M audio frequency, looks in audio service and the E1 business one or more.
Further, the business that provides of the said second professional expansion board comprises trunk call, subscriber phone, hotline, magnetic telephone, E/M audio frequency, looks in audio service and the E1 business one or more.
To sum up, 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber that the utility model provides, integrated gigabit Ethernet fiber optical transceiver; The PDH optical transceiver; The function of plurality of devices such as PCM equipment, thus realize that an optical cable can transmit multiple business, realize the multi-service unification; Thereby the saving fiber resource reduces user's construction cost and service equipment cost.
In addition; 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber fixedly provide the Ethernet service of 4 road 1000M for the user, 8 road E1, and 1 road RS232 is professional; Have 2 expansion slot positions simultaneously; The expansion slot position can provide E1 interface, trunk call, subscriber phone, hotline, magnetic telephone, E/M audio frequency, look audio service etc., has well satisfied different user, the demand of different business.
Description of drawings
Fig. 1 is the structural representation of 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber of the utility model;
Fig. 2 is the front-panel structure sketch map of the utility model;
Fig. 3 is the rear panel structure sketch map of the utility model;
Fig. 4 is the structural representation of the expansion slot position business board of the utility model;
Fig. 5 is the structural representation of the E/M audio service plate of the utility model;
Fig. 6 is the structural representation of looking the audio service plate of the utility model;
Fig. 7 is the structural representation of the E1 business board of the utility model;
Fig. 8 is the improved networking structure of the network figure of the utility model;
Fig. 9 is the improved networking structure of the network figure of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Provide the structural representation of 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber referring to Fig. 1, comprised cabinet, mainboard, power supply disks, the first professional expansion board and the second professional expansion board.
Cabinet is realized function: be used to place power supply disks, mainboard, the first professional expansion board and the second professional expansion board.
Power supply disks is realized function: accomplish the 220V alternating current or-the 48V direct current is to+galvanic the conversion of 5V, after the conversion+the 5V direct current is a main board power supply.
Mainboard is realized function: with the Ethernet interface of 4 road 1000M; 8 road E1 interfaces, 1 road RS232 interface, the signal synthesis of the first professional expansion board, the second professional expansion board is multiplexing to convert light signal into after together; Pass through Optical Fiber Transmission again, thereby realize the long Distance Transmission of multiple business.
The function that the first professional expansion board and the second professional expansion board realize: this equipment provides the business board of two expansions; Can match different business according to user's actual need; The expansion slot position can provide trunk call, subscriber phone, hotline, magnetic telephone, E/M audio frequency, look audio service, E1 business etc., is convenient to user's dilatation and perhaps changes business and do not want more exchange device.
Be main board power supply through electric power connection line between power supply disks and the mainboard.
Be connected through the Ou Pin connector between mainboard and the professional expansion board, accomplish power supply and handshaking professional expansion board.
4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber utilize minimum Optical Fiber Transmission more professional, have not only practiced thrift fiber resource, and the bandwidth of Ethernet is provided, and also improved user's construction and maintenance cost greatly, and performance index satisfy industry standard fully.
4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber and current device are relatively professional, referring to table 1:
Table 1
From table 1, can find out, present transmission equipment transport service function singleness, 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber are concentrated the multiple business functions, and have service expansion capability, and the bandwidth of Ethernet is 1000M.
The interfacing index:
● coffret:
Optical interface
■ nominal rate: 1.25Gbps
■ interface code type: 8B/10B
The ■ optical fiber connector: SC, FC, ST are optional
The ■ transmission range: two fine 20 kilometers, 25 kilometers of single fibers, customizable farther optical module can reach 120 kilometers farthest.
● business interface:
Ethernet interface
■ meets IEEE 802.3z/AB 1000Base-T/SX/LX/ZX, IEEE802.3
Standards such as 10base-T;
■ supports the cross spider direct-through line to set automatically
■ transmission rate: 10M/100M/1000M self adaptation
The E1 interface
■ nominal rate: 2048Kbps ± 50ppm
■ interface code type: HDB3
■ interface impedance: 75 Ω (unbalanced interface)
■ electrical characteristic: meet ITU-T and G.703 advise
■ transfer characteristic: meet ITU-T and G.823 advise
■ input jitter tolerance: meet ITU-T and G.823 advise
Look COBBAIF
■ video conference framework agreement: framework agreement H.320
■ video encoding standard: MPEG-1/2/4
The ■ transmission rate: 768K-8M is adjustable
■ supports resolution: CIF, HD1, D1
■ analog video input/output interface: SVIDEO, lotus flower head
■ analog video I/O standard: Y/C component vide, composite video
■ analog video I/O level: 1VP-P
■ analog video I/O impedance: 75 Ω
■ audio frequency input/output interface: lotus flower head
■ audio frequency I/O standard: stereo audio
■ audio frequency I/O sample rate: 44.1KHz
■ audio frequency I/O impedance: 600 Ω are non-equilibrium
The FXS audio user interface
■ feed voltage: DC48V (error+6V/-4.8V) or DC
-24V (error+4V/-2V)
■ or DC-60V (error+6V/-6V)
■ loop current: 18-24mA nominal value 20mA
■ feedback bell voltage: AC 75 ± 10V 25 ± 3Hz
■ cuts bell time: 50ms (maximum 200ms)
■ two wires input impedance: 200+560 Ω // 0.1uf
The ■ two wires is to four line gain-frequency characterisitics: 0 ± 0.5
■ four lines are to two wires gain-frequency characterisitic-3.5 ± 0.5db
■ return loss: >=20db
The ■ degree of balance: >=50db
■ common-mode rejection ratio: 60-70db
■ PSRR: Vcc:30db Vbat:30db
■ idle channel noise: 75db
FXO voice frequency relay interface
The ■ ring detects voltage: 35--90V
The ■ ring detects frequency: 17-60Hz
The ■ ring does not detect voltage :≤15V
■ two wires loop circuit impedance: off hook state 200+680 Ω // 0.1uf
Hook state 2M Ω
The ■ two wires is to four line gain-frequency characterisitics: hook state-0.60 ± 0.2db
The ■ two wires is to four line gain-frequency characterisitics: off hook state 0 ± 0.5
■ four lines arrive the two wires gain-frequency characterisitic: off hook state-3.5 ± 0.5db
■ return loss: >=20db
The ■ degree of balance: >=50db
■ common-mode rejection ratio: 60-70db
■ PSRR: 30db
■ idle channel noise: 75db
The magnetic telephone interface
■ feedback bell voltage: AC 75 ± 10V 25Hz
The ■ ring detects voltage: 35--90V
The ■ ring detects frequency: 17-60Hz
The ■ ring does not detect voltage :≤15V
■ two wires input impedance: normal but not ringing condition 600 Ω
■ two wires input impedance: ring or abnormality 100K Ω
The ■ two wires is to four line gain-frequency characterisitic: 0 ± 0.5db
■ four lines are to two wires gain-frequency characterisitic :-3.5 ± 0.5db
■ return loss: >=20db
The ■ degree of balance: >=50db
■ common-mode rejection ratio: 60-70db
■ PSRR: 30db
■ idle channel noise: 75db
■ AD gain: 0 ± 0.5db
■ DA gain :-3.5 ± 0.5db
■ AD frequency characteristic (300-3400Hz): 0 ± 0.2db
■ DA frequency characteristic (300-3400Hz): 0 ± 0.2db
■ exports loop circuit impedance: 600 Ω
■ imports loop circuit impedance: 600 Ω
The ■ degree of balance: 60-70db
■ return loss: >=20db
The maximum common mode of ■ is withstand voltage: 300V
■ common-mode rejection ratio:＞55db
■ PSRR: 30db
■ idle channel noise: 60db
■ AD gain :+14db or 0db
■ DA gain :+4db or 0db
■ AD frequency characteristic (300-3400Hz): 0 ± 0.2db
■ DA frequency characteristic (300-3400Hz): 0 ± 0.2db
■ exports loop circuit impedance: 600 Ω
■ imports loop circuit impedance: 600 Ω
The ■ degree of balance: 60db
The maximum common mode of ■ is withstand voltage: 300V
■ common-mode rejection ratio:＞60db
■ PSRR: 30db
■ idle channel noise:＞60db
The RS232 data-interface
■ physical characteristic: the interface standard that meets RS232 communication protocol
■ interface type: adopt the RJ45 connector
■ interface rate: 0 ~ 38.4Kbps self adaptation
Below, the product structure sketch map is provided,
Referring to Fig. 2 is the front-panel structure sketch map, and front panel specifies: from left to right
● mains switch:
It is opening power that the ■ switch pushes ON, and pushing OFF is powered-down.
● indicator light:
■ PWR power supply indicator (green): when internal electric source is in proper working order, Chang Liang.
The total alarm indicator of ■ ALM (red): when local terminal has other any alarms to occur, total stand by lamp Chang Liang.When local terminal had no alarm, when far-end had other any alarms to occur, total stand by lamp flicker was bright.
■ LOS1 ~ 12E1 branch road is lost stand by lamp (red): during E1 branch road Received Loss Of Signal, the respective branch stand by lamp is bright.
● functional switch:
The 1st of ■: local terminal, far-end state are selected
When switch is OFF, show the local terminal equipment alarm;
When switch is ON, show the opposite equip. alarm
The 2nd of ■: shielding E1 alarm is selected
When switch is OFF, do not shield the E1 alarm;
When switch is ON, shield untapped E1 alarm
The 3rd of ■: sound alarm is opened and is closed
When switch is OFF, close sound alarm;
When switch is ON, open sound alarm
■ 4-6 position: subsequent use
The 7th of ■: Ethernet is isolated switch (the 8th for ON time effective) is set
When switch is OFF, the port intercommunication
When switch is ON, port isolation
The 8th of ■: software or toggle switch effect are provided with switch
When switch was OFF, the ethernet port mode of operation was determined by software arrangements
(this mode of operation the 7th Bit switch is invalid)
When switch was ON, the ethernet port mode of operation was determined by toggle switch
(this mode of operation the 7th Bit switch is effective)
The 9th of ■: software I SP online upgrading switch
When switch is OFF, normal mode of operation
When switch is ON, the online upgrading pattern
The 10th of ■: webmaster address selection switch
When switch is OFF, far-end mode
When switch is ON, the local side pattern
● the optical interface alarm indicator:
■ LOS light path is lost stand by lamp (red): when light receiving signal was lost, stand by lamp was bright.
■ LOF light path OOF stand by lamp (red): during the light-receiving OOF, stand by lamp is bright.
The serious error code stand by lamp of ■ E-3 (red): the light-receiving number of bit errors surpasses 10
-3During rank, stand by lamp is bright.
■ E-6 error code stand by lamp (Huang): the light-receiving number of bit errors surpasses 10
-6During rank, stand by lamp is bright.
● Ethernet service interface
■ 1-4 is 4 road gigabit Ethernet business interfaces, and interface socket is a tape light RJ45 mouth, can indicate the interface operating state.
■ 1000M circuit link/transmitting-receiving action indicator (green): lamp Chang Liang during circuit link speed 1000M has Data Receiving or sends glittering.
■ 100M circuit link/transmitting-receiving action indicator (Huang): lamp Chang Liang during circuit link speed 100M has Data Receiving or sends glittering.
■ interface lamp does not work: circuit links undesired or is operated in the 10M rate mode at circuit interface
● the RS232 business interface
Interface socket is the RJ45 mouth, and every mouthful goes out 1 road RS232 business.
Referring to Fig. 3 is the rear panel structure sketch map, and rear board specifies: from left to right
● optical communication interface
The ■ optical interface is supported single fiber, two fine transmission, interfaces such as the optional FC of interface, SC, ST
■ TX is that light sends output, and RX is the light-receiving input
● the E1 business interface
1-8 road E1 business interface adopts the DB37 interface, joins 1 DB37F-16 during use
*The BNCF patchcord.
● expansion slot position interface
■ SLOT1, SLOT2 are the groove position interface of activating business, and take 9-10,11-12 road E1 respectively
■ expansion slot position business support: trunk call, subscriber phone, hotline, magnetic telephone, E/M audio frequency, look audio frequency, E1 business etc.
● the power supply power supply interface
■ power supply interface, support 220V exchange input or-input of 48V direct current
Referring to Fig. 4 is the structural representation of expansion slot position business board; Trunk call, subscriber phone, hotline, magnetic telephone business board; This business board can provide the trunk call of 1-16 road, subscriber phone, hotline, magnetic telephone business; Interface adopts the RJ45 socket, and every mouthful goes out No. 4 telephone service interfaces, and 4 RJ45 sockets go out No. 16 telephone service interfaces altogether.
Referring to Fig. 5 is the structural representation of E/M audio service plate, and this business board can provide 1-8 road 2 lines or 4 line E/M business, and interface adopts the RJ45 socket, and every mouthful goes out 2 tunnel business, and 4 RJ45 go out 8 road E/M business altogether.
Referring to Fig. 6 is the structural representation of looking the audio service plate, and this business board can provide 1 road bidirectional video and audio professional, and interface adopts the lotus flower joint.
Referring to Fig. 7 is the structural representation of E1 business board, and this business board can provide 2 road E1 professional, and interface adopts the same spindle nose of BNC.
The 4 mouthfuls of multi-service integrated transmission equipment of kilomega optic fiber application in certain chaebol's network rebuilding: company is a chaebol; There are a plurality of in a city; Rent local telephone network, rent mutually intercommunication, office and the Internet demand of network between realizing to operator respectively between general headquarters and the branch, annual renting at telephone communication and network needs to drop into first expenses up to ten thousand.Through the network rebuilding, only need parent company to rent network and local telephone network, need not rent network and local telephone network to operator again between the branch, the fund input of practicing thrift in the network rebuilding, is only needed once investment.
For the networking structure of the network figure before transforming, can find out that Working information is through internet transmission between each department referring to Fig. 8 from above net structure figure, not only bandwidth is low, and the information security band is less than guarantee.Communication on telephone also must pass through the pstn telephone switching network, thereby produces cost of the phone call.
Referring to Fig. 9 is improved networking structure of the network figure, only needs general headquarters to rent the Internet and pstn telephone switching network after the network rebuilding.
For communication network resource, the saving equipment investment that makes full use of optical communication; Adopt the point-to-point form of optical transmission to come networking to realize; This mode biggest advantage is to settle at one go like this; Simple and convenient, input cost is also low, has simplified equipment and has practiced thrift investment of devices, improved maintaining secrecy and security reliability to communication simultaneously greatly.
Explain: place one the 4 mouthfuls multi-service integrated transmission equipments of kilomega optic fiber in each branch; And at one 4 mouthfuls multi-service integrated transmission equipments of kilomega optic fiber of the same placement of general headquarters; Form in pairs and use, the 4 mouthfuls every pair multi-service integrated transmission equipments of kilomega optic fiber can transmit 1 ~ 32 voice and 4 road 10M/100M/1000M Ethernets and 8 road E1 passages.4 tunnel gigabit ethernet interfaces can be with the Internet and internal office work net separately, thereby ensure information security, and internal network office bandwidth brought up to 1000M, makes things convenient for the quick transmission of mass file.Telephone contact between each department all is that inside line is contacted directly, thereby can not produce any cost of the phone call.There are several branches just to put and several equipment just solved all service communications.Subsequent use after two remaining gigabit ethernet interfaces can be kept, can increase new service application at any time.
More than a kind of 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber that the utility model provided have been carried out detailed introduction; Used concrete example among this paper the principle and the execution mode of the utility model are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the utility model; Simultaneously, for one of ordinary skill in the art, according to the thought of the utility model, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (6)
1. the one kind 4 mouthfuls multi-service integrated transmission equipments of kilomega optic fiber is characterized in that, comprise cabinet, mainboard, power supply disks, the first professional expansion board and the second professional expansion board; Wherein, be placed with power supply disks in the cabinet, mainboard, the first professional expansion board and the second professional expansion board; Power supply disks with the 220V alternating current or-the 48V direct current converts to+be main board power supply behind the 5V direct current; Mainboard is the Ethernet interface of 4 road 1000M, 8 road E1 interfaces, 1 road RS232 interface; The signal synthesis of the first professional expansion board, the second professional expansion board is multiplexing to convert light signal into after together, passes through Optical Fiber Transmission again.
2. 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber according to claim 1 is characterized in that, connect through electric power connection line between said power supply disks and the mainboard.
3. 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber according to claim 1 is characterized in that, are connected through the Ou Pin connector between said mainboard and the first professional expansion board.
4. 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber according to claim 1 is characterized in that, are connected through the Ou Pin connector between said mainboard and the second professional expansion board.
5. 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber according to claim 1; It is characterized in that the business that the said first professional expansion board provides comprises trunk call, subscriber phone, hotline, magnetic telephone, E/M audio frequency, look in audio service and the E1 business one or more.
6. 4 mouthfuls of multi-service integrated transmission equipments of kilomega optic fiber according to claim 1; It is characterized in that the business that the said second professional expansion board provides comprises trunk call, subscriber phone, hotline, magnetic telephone, E/M audio frequency, look in audio service and the E1 business one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242046 CN202634439U (en) | 2012-05-25 | 2012-05-25 | Four-port gigabit optical fiber multi-service integrated transmission equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242046 CN202634439U (en) | 2012-05-25 | 2012-05-25 | Four-port gigabit optical fiber multi-service integrated transmission equipment |
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| Publication Number | Publication Date |
|---|---|
| CN202634439U true CN202634439U (en) | 2012-12-26 |
Family
ID=47387580
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|---|---|---|---|
| CN 201220242046 Expired - Lifetime CN202634439U (en) | 2012-05-25 | 2012-05-25 | Four-port gigabit optical fiber multi-service integrated transmission equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506236A (en) * | 2014-12-17 | 2015-04-08 | 河南省电力勘测设计院 | Small optical end equipment integrated with telephone interface and network interfaces |
| CN106130653A (en) * | 2016-06-03 | 2016-11-16 | 北京昊普康科技股份有限公司 | Data transmission device and method |
| CN106210654A (en) * | 2016-08-16 | 2016-12-07 | 安徽省瑞鼎电子技术有限公司 | Network communicating system based on SDH technology |
| CN112565028A (en) * | 2020-11-16 | 2021-03-26 | 国网浙江宁波市鄞州区供电有限公司 | Multi-point to multi-point multi-service access system based on IP transmission network |
-
2012
- 2012-05-25 CN CN 201220242046 patent/CN202634439U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506236A (en) * | 2014-12-17 | 2015-04-08 | 河南省电力勘测设计院 | Small optical end equipment integrated with telephone interface and network interfaces |
| CN106130653A (en) * | 2016-06-03 | 2016-11-16 | 北京昊普康科技股份有限公司 | Data transmission device and method |
| CN106210654A (en) * | 2016-08-16 | 2016-12-07 | 安徽省瑞鼎电子技术有限公司 | Network communicating system based on SDH technology |
| CN112565028A (en) * | 2020-11-16 | 2021-03-26 | 国网浙江宁波市鄞州区供电有限公司 | Multi-point to multi-point multi-service access system based on IP transmission network |
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Address after: 100085, Beijing, Haidian District Qinghe Anning East Road, building No. 23, No. 18 floor Patentee after: Beijing Hao Pukang Polytron Technologies Inc Address before: 100085, Beijing, Haidian District Qinghe Anning East Road, building No. 23, No. 18 floor Patentee before: Beijing Wuhaokang Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
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Granted publication date: 20121226 |