CN103929239B - The Channel Test of the protective relaying device method of work of switching-over light path interface agency - Google Patents
The Channel Test of the protective relaying device method of work of switching-over light path interface agency Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 230000001681 protective effect Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000013307 optical fiber Substances 0.000 claims abstract description 134
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 33
- 238000003825 pressing Methods 0.000 claims description 21
- 239000000835 fiber Substances 0.000 claims description 12
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- 235000009470 Theobroma cacao Nutrition 0.000 description 1
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- 244000240602 cacao Species 0.000 description 1
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Abstract
The present invention relates to the method for work of the Channel Test switching-over light path interface agency of a kind of protective relaying device, the power end of the control module of switching-over light path interface agency is connected with controlling power supply, input is connected with button switching switch, outfan is connected with driving module, light path handover module includes two light magnetic switches, four send optical fiber interface and four reception optical fiber interfaces, the outfan driving module is connected with the control end of two light magnetic switches respectively, the input of two light magnetic switches and outfan send optical fiber interface with corresponding, reception optical fiber interface connects, by controlling the control signal that module provides the light path handover module of correspondence conducting, got final product and protective relaying device by changeable optical-path interface mechanism, light power meter or Optical attenuator connect, again through the light path switching driving module drive light path handover module to carry out multiplex roles, normal running status can be entered and enter protection test and the test mode of optical-fibre channel test。
Description
The application is application number: 201010502186.2, and invention and created name is " optical path switching interface mechanism for fiber channel test of protective relaying device ", and the applying date is: the divisional application of in JIUYUE, 2010 application for a patent for invention of 29 days。
Technical field
The present invention relates to the method for work of the optical path switching interface mechanism for fiber channel test of a kind of protective relaying device, belong to protective relaying device technical field。
Background technology
Secondary device in power system is for being monitored the work of primary equipment, control, regulate, protect and providing operating condition for operation, attendant or produce the low voltage electrical equipment needed for command signal, and relay protection mechanism is important secondary loop in power system equipment。Along with the progressively popularization of intelligent substation and intelligent grid, its traditional cable communication mode is replaced by optic fiber beam sensor mode。The protection of 220kV and above optical-fibre channel is in protective calibration is tested and when measuring luminous power; need frequently to be mounted and dismounted from protective relaying device by fiber cable joint; therefore the abrasion and the optical fiber interface contact surface attenuation that easily lead to fiber optic cable interface increase; thus affecting the accuracy of protective relaying device verification; even owing to fiber optic cable interface damages, bring hidden danger to the safe and reliable operation of power circuit main protection。
And the protection device verification that current optical fiber protecting equipment both domestic and external runs for scene, the especially verification of optical-fibre channel not yet have standard and perfect checking process。
Summary of the invention
It is an object of the invention to provide a kind of in the optical fiber interface situation that need not dismount protective relaying device; switched by the light path of multiplex roles, the method for work of the optical path switching interface mechanism for fiber channel test of the protective relaying device of protection test and optical-fibre channel test job can be completed。
The present invention is the technical scheme reaching above-mentioned purpose: provide the method for work of the Channel Test switching-over light path interface agency of a kind of protective relaying device, described optical path switching interface mechanism for fiber channel test includes: hood and the control module being arranged in hood, drive module and light path handover module, described control module is complicated programmable logic device, the power end controlling module is connected with controlling power supply, the button of the input and the running status being arranged on hood panel and test mode that control module switches switch and is connected, the outfan controlling module is connected with driving module, module is driven to be made up of Darlington transistor, described light path handover module includes two light magnetic switches, four send optical fiber interface and four reception optical fiber interfaces, the outfan driving module is connected with the control end of two light magnetic switches of light path handover module respectively, 2 × 2A/D magneto-optic shutter selected by light magnetic switch, two inputs of the first smooth magnetic switch Kl connect the first transmission optical fiber interface TX1 and the three respectively and send optical fiber interface TX3, two outfans of the first smooth magnetic switch Kl connect the second transmission optical fiber interface TX2 and the four respectively and send optical fiber interface TX4, two inputs of the second smooth magnetic switch K2 connect the second reception optical fiber interface RX2 and the three respectively and receive optical fiber interface RX3, two outfans of the second smooth magnetic switch K2 connect the first reception optical fiber interface RX1 and the four respectively and receive optical fiber interface RX4；The panel of described hood is also equipped with the status indicator lamp of running status and the status indicator lamp of test mode, and the outfan controlling module is connected with status indicator lamp；
The method of work of the Channel Test switching-over light path interface agency of this protective relaying device includes: respectively send optical fiber interface during use and reception optical fiber interface is connected with the optical fiber interface on protective relaying device and light power meter or Optical attenuator with the optical fiber of joint by two ends；
Switch between " normal condition " and " test mode " by pressing button switching switch, the input signal of the button switching switch on panel is gathered by controlling module, after logical transition, by driving module to control the on and off of two magneto-optic shutters thus carrying out light path switching；Pressing button, when pressing switching between " normal condition " and " test mode ", shows the state of input signal by status indicator lamp。
Further, when pressing the button switching switch and entering running status, the transmission anode TXa that signal is protected through this side of protective relaying device, first sends optical fiber interface TX1, the second input IN2 and the first outfan OUT1 of the first smooth magnetic switch Kl, after second transmission optical fiber interface TX2, access the reception negative terminal RXb of protective relaying device offside protection, transmission negative terminal TXb through offside protection, second receives optical fiber interface RX2, enter the second input IN2 of the second smooth magnetic switch K2, first outfan OUT1, receive optical fiber interface RX1 by first and enter the reception anode RXa of this side protection, now protective relaying device enters properly functioning；
When pressing the button switching switch and entering test mode, switching-over light path passage, send optical fiber interface TX4 and the three by external short fiber by the 4th and receive optical fiber interface RX3 connection, the transmission anode TXa that now signal is protected through this side of protective relaying device, first sends optical fiber interface TX1, the second input IN2 of the first smooth magnetic switch Kl, second outfan OUT2, 4th sends optical fiber interface TX4, 3rd receives optical fiber interface RX3, enter the first input end IN1 of the second smooth magnetic switch K2, then through the first outfan OUT1, receive optical fiber interface RX1 by first and enter the reception anode RXa of this protection side, side, carry out this side protection from ring；
When pressing the button switching switch and entering test mode; switching-over light path passage; its the 4th transmission optical fiber interface TX4 connects light power meter; now signal is through the second input IN2 sending anode TXa, the first transmission optical fiber interface TX1, the first smooth magnetic switch Kl of this protection side, side of protective relaying device; then through the second outfan OUT2, the 4th transmission optical fiber interface TX4 and light power meter, the test of this side protection luminous power can be carried out；
When pressing the button switching switch and entering test mode; switching-over light path passage; 4th receives optical fiber interface RX4 connects light power meter; now signal sends negative terminal TXb, the second reception optical fiber interface RX2, the second input IN2 of the second smooth magnetic switch K2, Ran through the second outfan OUT2, the 4th reception optical fiber interface RX4 and light power meter through what protective relaying device offside was protected, carries out the test of offside protection luminous power；
When pressing the button switching switch and entering test mode, switching-over light path passage, Optical attenuator is connected on the 4th reception optical fiber interface RX4 and the 3rd and receives between optical fiber interface RX3, now signal is through the transmission negative terminal TXb of the offside protection side of protective relaying device, second receives optical fiber interface RX2, the second input IN2 of the second smooth magnetic switch K2, then through the second outfan OUT2, 4th receives optical fiber interface RX4, Optical attenuator, 3rd receives optical fiber interface RX3, first input end IN1 through the second smooth magnetic switch K2, first outfan OUT1, receive optical fiber interface RX1 through first after and enter the reception anode RXa of this side protection, carry out the test of passage surplus。
The switching-over light path interface agency of the application present invention includes controlling module, driving module and light path handover module, and control module is CPLD, cheap, powerful, and control logic cocoa arbitrarily customizes as requested。Light path handover module of the present invention adopts magneto-optic shutter and is connected with sending optical fiber interface and receiving optical fiber interface, realize passive light switching, the high speed being conducive to light path switches, and magneto-optic shutter has, and time response is fast, switching time is short, loss is little, light path character changes little and controls simple feature, by controlling the control signal that module provides the light path handover module of correspondence conducting, again through the light path switching driving module drive light path handover module to carry out multiplex roles。Due to the fact that the fiber cable joint without dismounting on protective relaying device; can be connected with protective relaying device, light power meter or Optical attenuator by changeable optical-path interface mechanism; switch through light path; normal running status can be entered and enter protection test and the test mode of optical-fibre channel test; solve the problem that fibre-optical splice on protective relaying device frequently dismounts and the loose contact problem that causes and optical fiber interface damage, for improving scene protection verification and maintenance levels, there is important function。
Accompanying drawing explanation
Make further carefully to state in detail to embodiments of the invention below in conjunction with accompanying drawing。
Fig. 1 is the structural representation of the present invention。
Fig. 2 is principles of the invention block diagram。
Fig. 3 is the electrical schematic diagram that the light path handover module of the present invention is protected with this side and tested protection is connected。
Wherein: 1-hood, 2-optical fiber interface display lamp group, 3-button switching switch, 4-status indicator lamp, 5-controls power supply, and 6-controls module, and 7-drives module, and 8-drives power supply, 9-light path handover module。
Detailed description of the invention
See shown in figure l～3, the Channel Test of the protective relaying device of the present embodiment switching-over light path interface agency, including hood l and the control module 6 being arranged in hood l, drive module 7 and light path handover module 9, the control module 6 of the present invention is complicated programmable logic device, this complicated programmable logic device adopts altera corp to manufacture, by controlling module 6 to provide the switching signal of light path handover module 9 input of corresponding conducting, the power end controlling module 6 is connected with controlling power supply 5, this control power supply 5 takes DC24V, its power consumption is the smaller the better, the button switching switch 3 of the input and the running status installed on hood l panel and test mode that control module 6 is connected, this button switching switch 3 is to press at each, switch between " normal condition " and " test mode ", by controlling the input signal of the button switching switch 3 that module 6 gathers on panel, after logical transition, by driving module 7 to control the on and off of two magneto-optic shutters, to reach the purpose of light path switching。As shown in Figure 2, the present invention controls the outfan of module 6 and is connected with driving module 7, module 7 is driven to be made up of Darlington transistor, the one-level NPN Darlington triode of routine can be adopted, the base stage making Darlington triode connects the outfan controlling module 6, collector and emitter is connected with the input of two light magnetic switches of light path handover module 9 respectively, controls module 6 by driving module 7 to drive the action of two magneto-optic shutters, the external independent driving power supply 8 of driving module 7 of the present invention。See Fig. 2, shown in 3, the light path handover module 9 of the present invention includes at least two light magnetic switch, the reception optical fiber interface sending optical fiber interface and more than four of more than four, this control module 6, module 7 and two light magnetic switches are driven all to weld on circuit boards, circuit board is arranged in hood l by insulation board or insulating barrier, each optical fiber interface that sends of the present invention can adopt a PC/FC fibre-optical splice with reception optical fiber interface, and it is separately fixed at the both sides of hood l, it is connected with the optical fiber interface on protective relaying device and light power meter or Optical attenuator with the optical fiber of joint by two ends, reach protection test and the purpose of optical-fibre channel test job。As shown in Figure 2, the top of hood l of the present invention is respectively equipped with power interface, serial communication interface and locking interface etc., the outfan driving module 7 is connected with the control end of two light magnetic switches of light path handover module 9 respectively, to control the action of each smooth magnetic switch respectively, light magnetic switch can be selected for 2 × 2A/D magneto-optic shutter, two inputs of the first smooth magnetic switch Kl connect the first transmission optical fiber interface TX1 and the three respectively and send optical fiber interface TX3, and two outfans of the first smooth magnetic switch Kl connect the second transmission optical fiber interface TX2 and the four respectively and send optical fiber interface TX4；Two inputs of the second smooth magnetic switch K2 connect the second reception optical fiber interface RX2 and the three respectively and receive optical fiber interface RX3; two outfans of the second smooth magnetic switch K2 connect the first reception optical fiber interface RX1 and the four respectively and receive optical fiber interface RX4; during use; the transmission anode TXa and reception anode RXa that send optical fiber interface TX1 and the first reception this side of optical fiber interface RX1 and protective relaying device protection by first are connected, and the second reception optical fiber interface RX2 and the second sends the optical fiber interface TX2 transmission negative terminal TXb protected with offside and reception negative terminal RXb and be connected。
See shown in figure l; the Channel Test switching-over light path interface agency of the protective relaying device of the present embodiment is positioned at each transmission optical fiber interface and each reception optical fiber interface place is separately installed with each optical fiber interface display lamp at hood l panel; and the outfan controlling module 6 is connected with each optical fiber interface display lamp group 2; while completing light path switching, control module 6 controls corresponding optical fiber interface display lamp and shows。Same hood l panel is also equipped with the status indicator lamp 4 of running status and the status indicator lamp 4 of test mode, the same outfan controlling module 6 is connected with each status indicator lamp 4, when pressing switching between " normal condition " and " test mode ", shown the state of input signal by status indicator lamp 4。
As shown in Figure 3, when the Channel Test of the protective relaying device of the present embodiment works with switching-over light path interface agency, when pressing the button switching switch 3 entrance running status, the transmission anode TXa that signal is protected through this side of protective relaying device, first sends optical fiber interface TX1, the second input IN2 and the first outfan OUT1 of the first smooth magnetic switch Kl, after second transmission optical fiber interface TX2, access the reception negative terminal RXb of protective relaying device offside protection, transmission negative terminal TXb through offside protection, second receives optical fiber interface RX2, enter the second input IN2 of the second smooth magnetic switch K2, first outfan OUT1, receive optical fiber interface RX1 by first and enter the reception anode RXa of this side protection, now protective relaying device enters properly functioning。
As shown in Figure 3, when the Channel Test of the protective relaying device of the present embodiment works with switching-over light path interface agency, when pressing the button switching switch 3 entrance test mode, switching-over light path passage, send optical fiber interface TX4 and the three by external short fiber by the 4th and receive optical fiber interface RX3 connection, the transmission anode TXa that now signal is protected through this side of protective relaying device, first sends optical fiber interface TX1, the second input IN2 of the first smooth magnetic switch Kl, second outfan OUT2, 4th sends optical fiber interface TX4, 3rd receives optical fiber interface RX3, enter the first input end IN1 of the second smooth magnetic switch K2, then through the first outfan OUT1, receive optical fiber interface RX1 by first and enter the reception anode RXa of this protection side, side, carry out this side protection from ring。
As shown in Figure 3; when the Channel Test of the protective relaying device of the present embodiment works with switching-over light path interface agency; when pressing the button switching switch 3 entrance test mode; switching-over light path passage; its the 4th transmission optical fiber interface TX4 connects light power meter; now signal is through the second input IN2 sending anode TXa, the first transmission optical fiber interface TX1, the first smooth magnetic switch Kl of this protection side, side of protective relaying device; then through the second outfan OUT2, the 4th transmission optical fiber interface TX4 and light power meter, the test of this side protection luminous power can be carried out。
As shown in Figure 3; when the Channel Test of the protective relaying device of the present embodiment works with switching-over light path interface agency; when pressing the button switching switch 3 entrance test mode; switching-over light path passage; 4th receives optical fiber interface RX4 connects light power meter; now signal sends negative terminal TXb, the second reception optical fiber interface RX2, the second input IN2 of the second smooth magnetic switch K2, Ran through the second outfan OUT2, the 4th reception optical fiber interface RX4 and light power meter through what protective relaying device offside was protected, carries out the test of offside protection luminous power。
As shown in Figure 3, when the Channel Test of the protective relaying device of the present embodiment works with switching-over light path interface agency, when pressing the button switching switch 3 entrance test mode, switching-over light path passage, Optical attenuator is connected on the 4th reception optical fiber interface RX4 and the 3rd and receives between optical fiber interface RX3, now signal is through the transmission negative terminal TXb of the offside protection side of protective relaying device, second receives optical fiber interface RX2, the second input IN2 of the second smooth magnetic switch K2, then through the second outfan OUT2, 4th receives optical fiber interface RX4, Optical attenuator, 3rd receives optical fiber interface RX3, first input end IN1 through the second smooth magnetic switch K2, first outfan OUT1, receive optical fiber interface RX1 through first after and enter the reception anode RXa of this side protection, carry out the test of passage surplus。
Claims (1)
1. the Channel Test of the protective relaying device method of work of switching-over light path interface agency, it is characterized in that described Channel Test switching-over light path interface agency includes: hood and the control module being arranged in hood, drive module and light path handover module, described control module is complicated programmable logic device, the power end controlling module is connected with controlling power supply, the button of the input and the running status being arranged on hood panel and test mode that control module switches switch and is connected, the outfan controlling module is connected with driving module, module is driven to be made up of Darlington transistor, described light path handover module includes two light magnetic switches, four send optical fiber interface and four reception optical fiber interfaces, the outfan driving module is connected with the control end of two light magnetic switches of light path handover module respectively, 2 × 2A/D magneto-optic shutter selected by light magnetic switch, two inputs of the first smooth magnetic switch Kl connect the first transmission optical fiber interface TX1 and the three respectively and send optical fiber interface TX3, two outfans of the first smooth magnetic switch Kl connect the second transmission optical fiber interface TX2 and the four respectively and send optical fiber interface TX4, two inputs of the second smooth magnetic switch K2 connect the second reception optical fiber interface RX2 and the three respectively and receive optical fiber interface RX3, two outfans of the second smooth magnetic switch K2 connect the first reception optical fiber interface RX1 and the four respectively and receive optical fiber interface RX4；The panel of described hood is also equipped with the status indicator lamp of running status and the status indicator lamp of test mode, and the outfan controlling module is connected with status indicator lamp；
The method of work of the Channel Test switching-over light path interface agency of this protective relaying device includes: respectively send optical fiber interface during use and reception optical fiber interface is connected with the optical fiber interface on protective relaying device and light power meter or Optical attenuator with the optical fiber of joint by two ends；
When pressing the button switching switch and entering running status, the transmission anode TXa that signal is protected through this side of protective relaying device, first sends optical fiber interface TX1, the second input IN2 and the first outfan OUT1 of the first smooth magnetic switch Kl, after second transmission optical fiber interface TX2, access the reception negative terminal RXb of protective relaying device offside protection, transmission negative terminal TXb through offside protection, second receives optical fiber interface RX2, enter the second input IN2 of the second smooth magnetic switch K2, first outfan OUT1, receive optical fiber interface RX1 by first and enter the reception anode RXa of this side protection, now protective relaying device enters properly functioning；
When pressing the button switching switch and entering test mode, switching-over light path passage, send optical fiber interface TX4 and the three by external short fiber by the 4th and receive optical fiber interface RX3 connection, the transmission anode TXa that now signal is protected through this side of protective relaying device, first sends optical fiber interface TX1, the second input IN2 of the first smooth magnetic switch Kl, second outfan OUT2, 4th sends optical fiber interface TX4, 3rd receives optical fiber interface RX3, enter the first input end IN1 of the second smooth magnetic switch K2, then through the first outfan OUT1, receive optical fiber interface RX1 by first and enter the reception anode RXa of this protection side, side, carry out this side protection from ring；
When pressing the button switching switch and entering test mode; switching-over light path passage; its the 4th transmission optical fiber interface TX4 connects light power meter; now signal is through the second input IN2 sending anode TXa, the first transmission optical fiber interface TX1, the first smooth magnetic switch Kl of this protection side, side of protective relaying device; then through the second outfan OUT2, the 4th transmission optical fiber interface TX4 and light power meter, the test of this side protection luminous power can be carried out；
When pressing the button switching switch and entering test mode; switching-over light path passage; 4th receives optical fiber interface RX4 connects light power meter; now signal sends negative terminal TXb, the second reception optical fiber interface RX2, the second input IN2 of the second smooth magnetic switch K2, Ran through the second outfan OUT2, the 4th reception optical fiber interface RX4 and light power meter through what protective relaying device offside was protected, carries out the test of offside protection luminous power；
When pressing the button switching switch and entering test mode, switching-over light path passage, Optical attenuator is connected on the 4th reception optical fiber interface RX4 and the 3rd and receives between optical fiber interface RX3, now signal is through the transmission negative terminal TXb of the offside protection side of protective relaying device, second receives optical fiber interface RX2, the second input IN2 of the second smooth magnetic switch K2, then through the second outfan OUT2, 4th receives optical fiber interface RX4, Optical attenuator, 3rd receives optical fiber interface RX3, first input end IN1 through the second smooth magnetic switch K2, first outfan OUT1, receive optical fiber interface RX1 through first after and enter the reception anode RXa of this side protection, carry out the test of passage surplus；
Pressing button, when pressing switching between " normal condition " and " test mode ", shows the state of input signal by status indicator lamp。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132044.XA CN103929239B (en) | 2010-09-29 | 2010-09-29 | The Channel Test of the protective relaying device method of work of switching-over light path interface agency |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132044.XA CN103929239B (en) | 2010-09-29 | 2010-09-29 | The Channel Test of the protective relaying device method of work of switching-over light path interface agency |
| CN201010502186.2A CN101969341B (en) | 2010-09-29 | 2010-09-29 | Optical path switching interface mechanism for fiber channel test of relay protection device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010502186.2A Division CN101969341B (en) | 2010-09-29 | 2010-09-29 | Optical path switching interface mechanism for fiber channel test of relay protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103929239A CN103929239A (en) | 2014-07-16 |
| CN103929239B true CN103929239B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010502186.2A Active CN101969341B (en) | 2010-09-29 | 2010-09-29 | Optical path switching interface mechanism for fiber channel test of relay protection device |
| CN201410132485.XA Active CN103929244B (en) | 2010-09-29 | 2010-09-29 | The method of work of the switching-over light path interface agency of protective relaying device |
| CN201410132044.XA Active CN103929239B (en) | 2010-09-29 | 2010-09-29 | The Channel Test of the protective relaying device method of work of switching-over light path interface agency |
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| CN201010502186.2A Active CN101969341B (en) | 2010-09-29 | 2010-09-29 | Optical path switching interface mechanism for fiber channel test of relay protection device |
| CN201410132485.XA Active CN103929244B (en) | 2010-09-29 | 2010-09-29 | The method of work of the switching-over light path interface agency of protective relaying device |
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| CN107528571B (en) * | 2017-09-07 | 2021-01-26 | 成都航天通信设备有限责任公司 | FPGA simulator switching device and method |
| CN113391098B (en) * | 2021-06-15 | 2023-04-07 | 贵州电网有限责任公司 | Optical difference protection coaxial cable channel control device and control method thereof |
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| CN1595764A (en) * | 2004-06-22 | 2005-03-16 | 北京四方继保自动化股份有限公司 | Swap-free optical fiber multiplexing apparatus for relaying protection |
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| EP1209834B1 (en) * | 2000-11-28 | 2017-11-08 | Kabushiki Kaisha Toshiba | Ring interconnection network system, node equipment, network management equipment, and path setting method |
| JP4520763B2 (en) * | 2004-03-29 | 2010-08-11 | 富士通株式会社 | Relay transmission equipment |
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| CN201234126Y (en) * | 2008-07-16 | 2009-05-06 | 电信科学技术仪表研究所 | Multiplex protection switching device between low-speed optical fiber interface and 2M transmission line |
| CN201821353U (en) * | 2010-09-29 | 2011-05-04 | 江苏省电力公司常州供电公司 | Optical path switcher |
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- 2010-09-29 CN CN201010502186.2A patent/CN101969341B/en active Active
- 2010-09-29 CN CN201410132485.XA patent/CN103929244B/en active Active
- 2010-09-29 CN CN201410132044.XA patent/CN103929239B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7103275B2 (en) * | 2001-07-16 | 2006-09-05 | Fujitsu Limited | Optical transmission system |
| CN1595764A (en) * | 2004-06-22 | 2005-03-16 | 北京四方继保自动化股份有限公司 | Swap-free optical fiber multiplexing apparatus for relaying protection |
| CN1909420A (en) * | 2005-08-01 | 2007-02-07 | 中兴通讯股份有限公司 | Optical switch reversing device for test of multiple light jaws equipment |
| CN101222277A (en) * | 2008-02-02 | 2008-07-16 | 烽火通信科技股份有限公司 | Optical channel power automatic equalization method of WSS type ROADM node equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103929244A (en) | 2014-07-16 |
| CN103929239A (en) | 2014-07-16 |
| CN103929244B (en) | 2016-06-22 |
| CN101969341A (en) | 2011-02-09 |
| CN101969341B (en) | 2014-04-16 |
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