CN101931486B - Optical fiber line warning door line protection method of wavelength division system - Google Patents
Optical fiber line warning door line protection method of wavelength division system Download PDFInfo
- Publication number
- CN101931486B CN101931486B CN200910070988.8A CN200910070988A CN101931486B CN 101931486 B CN101931486 B CN 101931486B CN 200910070988 A CN200910070988 A CN 200910070988A CN 101931486 B CN101931486 B CN 101931486B
- Authority
- CN
- China
- Prior art keywords
- insertion loss
- primary
- fibre core
- luminous power
- subsequent use
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention relates to an optical fiber line warning door line protection method of a wavelength division system, which concretely comprises the following steps of: subtracting the receiving optical power of a local terminal optical protection unit from the optical power of the transmitting port of a paired optical protection unit to obtain the line insertion loss value of a fiber core, and sequentially detecting the line insertion loss values of a main fiber core and a spare fiber core; wherein the line insertion losses are adopted as switching criterions which comprise two switching criterions, one switching criterion is the criterion for switching from a main line to a spare line and comprises the conditions that the line insertion loss value of any fiber core of a main fiber exceeds the set switching threshold value of the line insertion loss, and the line insertion loss values of two spare fiber cores are both above the set warning threshold of the line insertion loss; and the other switching criterion is the criterion for switching from the spare lines to the main line and comprises the conditions that the line insertion loss of any spare fiber core in the two spare fiber cores exceeds the set switching threshold, and the line insertion loss mean value of the two fiber cores is above the set warning threshold. The invention adopts the line insertion loss as the switching criterion for the line protection of the wavelength division system and effectively solves the difficult problem on multi-span section protection of the wavelength division system.
Description
Technical field
The present invention relates to a kind of fibre circuit guard method.Particularly relate to a kind of optical fiber cable line warning door guard method that effectively can solve the wavelength-division system of wavelength-division system multi-span protection.
Background technology
The protection of usual wavelength-division system adopts the mode of multiplex section Cheng Huan to protect, but this protected mode cost is very high, therefore most of wavelength-division system normally chain, especially a main line.Adopt the mode of fibre circuit automatic switching protection more effective for this circuit, and application is more and more general.The technology of current employing is, when the optical power down of primary optical fiber, namely triggers switching action, makes light protection system switch to alternate routing.The protection that this mode is applied in wavelength-division system exists many difficulties, and weak point is mainly reflected on transfer criterion.
As shown in Figure 1, two ends are that wavelength division multiplexing (OTM) is stood to typical wavelength-division system conservation project, and centre is that light amplification (OA) is stood, across section number not etc.Between middle OTM and OA, between OA and OA, all get involved light protected location.When wherein one section blocks; the OA of whole wavelength-division system will close; therefore each smooth protected location can receive the information of optical power down; thus trigger the switching action of light protected location; the all smooth protected location between whole OTM-OTM is caused to be switched; cause and switch confusion, even cause system irrecoverable.
Summary of the invention
Technical problem to be solved by this invention is; there is provided a kind of using the transfer criterion of circuit Insertion Loss as wavelength-division system route protection; instead of only using the luminous power of receiving terminal as transfer criterion, thus the optical fiber cable line warning door guard method of the wavelength-division system of wavelength-division system multi-span protection can be efficiently solved.
The technical solution adopted in the present invention is: a kind of optical fiber cable line warning door guard method of wavelength-division system, adopt circuit Insertion Loss as transfer criterion, it is that luminous power according to light protected location each port calculates that described circuit is inserted, the received optical power of local terminal light protected location is specifically deducted by the luminous power of the emission port of pairing light protected location, obtain the circuit Insertion Loss value of this root fibre core, detect the circuit Insertion Loss value of primary fibre core and fibre core for subsequent use according to above-mentioned account form successively; Described employing circuit Insertion Loss comprises two transfer criterions as transfer criterion, one is the criterion of primary circuit switching to extension wire: when any fibre core circuit Insertion Loss value of primary fibre exceedes the handoff threshold value of the circuit Insertion Loss of setting, and the circuit Insertion Loss value of two fibre cores for subsequent use is all on the alarming threshold of the circuit Insertion Loss of setting; Another is the criterion that extension wire switches to primary circuit: when a fibre core circuit Insertion Loss for subsequent use any in two fibre cores for subsequent use exceedes the handoff threshold of setting, and the circuit Insertion Loss average of primary two fibre cores is on the alarming threshold of setting.
The luminous power of described pairing end light protected location informs local terminal light protected location by the mode of communication or a message, communication or wireless communications portal in the concrete band adopting fibre core communication for subsequent use or primary fibre core.
The alarming threshold of described circuit Insertion Loss and handoff threshold are the reference values being set in advance in light protected location inside by external interface; the circuit Insertion Loss value adopting protected transmission system can bear is as handoff threshold; alarming threshold, then on handoff threshold, plays a part to give warning in advance.
The luminous power of described each port is that each protected location carries out luminous power voluntarily and detects and obtain.
The optical fiber cable line warning door guard method of described wavelength-division system, comprises the steps:
1) the alarming threshold P that protected system is allowed is set
alarmwith handoff threshold P
switch;
2) light protected location gathers the luminous power of each optical port, two protected system equipment ports, two primary fibre core ports, and two fibre core ports for subsequent use, totally 6 ports, the luminous power gathered is labeled as P respectively
tx, P
rx, P
t1, P
r1, P
t2, P
r2;
3) by extension wire, the luminous power of local terminal is passed to the other end;
4) Insertion Loss of every root fibre is calculated:
The Insertion Loss of the first primary fibre core: P
1 t1-P
2 r1
The Insertion Loss of the second primary fibre core: P
2 t1-P
1 r1
The Insertion Loss of the first fibre core for subsequent use: P
1 t2-P
2 r2
The Insertion Loss of the second fibre core for subsequent use: P
2 t2-P
1 r2
Wherein: P
1 t1represent the primary luminous power of left end OLP equipment;
P
1 t2represent the back lit power of left end OLP equipment;
P
1 r1represent the primary receipts luminous power of left end OLP equipment;
P
1 r2represent the receipts luminous power for subsequent use of left end OLP equipment;
P
2 t1represent the primary luminous power of right-hand member OLP equipment;
P
2 t2represent the back lit power of right-hand member OLP equipment;
P
2 r1represent the primary receipts luminous power of right-hand member OLP equipment;
P
2 r2represent the receipts luminous power for subsequent use of right-hand member OLP equipment;
5) criterion is set up:
(1) primary circuit switching to the condition of extension wire is: when a primary fibre core circuit Insertion Loss value any in primary fibre core exceed handoff threshold and the circuit Insertion Loss value of two fibre cores for subsequent use all on alarming threshold, namely satisfy condition:
P
1 T1-P
2 R1＜P
switch?or?P
2 T1-P
1 R1＜P
switch
P
1 T2-P
2 R2＞P
alarm?and?P
2 T2-P
1 R2＞P
alarm；
(2) extension wire switches to the condition of primary circuit and is: when a fibre core circuit Insertion Loss value for subsequent use any in fibre core for subsequent use exceed handoff threshold and the circuit Insertion Loss value of two primary fibre cores all on alarming threshold, namely satisfy condition:
P
1 T2-P
2 R2＜P
switch?or?P
2 T2-P
1 R2＜P
switch
P
1 T1-P
2 R1＞P
alarm?and?P
2 T1-P
1 R1＞P
alarm。
The optical fiber cable line warning door guard method of wavelength-division system of the present invention, adopts circuit Insertion Loss as the transfer criterion of wavelength-division system route protection, has following features:
(1) avoid leading portion to switch the cascade causing back segment to switch and switch problem, a difficult problem is switched in the cascade solving the protection of wavelength-division system multi-span.
(2) ripple up and down of wavelength-division system causes receiving terminal to obtain luminous power to change, and the simple luminous power that adopts, as criterion, can cause and abnormally to switch by mistake, adopt the present invention can avoid switching by mistake.
(3) adopt circuit Insertion Loss as criterion, can be easy to determine whether optical fiber blocks, thus ensure that the reliability that wavelength-division system protection switches.
(4) adopt extension wire Insertion Loss as assistant criteria simultaneously, can guarantee that wavelength-division system switches to the stable operation of extension wire energy, thus ensure that the validity that wavelength-division system protection switches.
accompanying drawing explanation
Fig. 1 is that wavelength-division system cascade protection adopts the schematic diagram of luminous power when judging;
Fig. 2 is present system schematic diagram;
Fig. 3 is the schematic diagram of wavelength-division system cascade protection when adopting the present invention to judge;
Fig. 4 is the second embodiment of the present invention.
Wherein:
1: left end OLP equipment 2: right-hand member OLP equipment
The primary optical fiber of 3: the first primary optical fiber 4: the second
5: the first spare fibre 6: the second spare fibre
A:OTM stands b: fiber optic protection unit
C:OA stands
embodiment
Explain below in conjunction with the optical fiber cable line warning door guard method of embodiment accompanying drawing to wavelength-division system of the present invention.
As shown in Figure 2; the optical fiber cable line warning door guard method of wavelength-division system of the present invention; adopt circuit Insertion Loss as transfer criterion; it is that luminous power according to light protected location each port calculates that described circuit is inserted, and the luminous power of described each port is that each protected location carries out luminous power voluntarily and detects and obtain.Specifically deduct the received optical power of local terminal light protected location by the luminous power of the emission port of pairing light protected location, obtain the circuit Insertion Loss value of this root fibre core, detect the circuit Insertion Loss value of primary fibre core and fibre core for subsequent use according to above-mentioned account form successively; The luminous power of described pairing end light protected location informs local terminal light protected location by the mode of communication or a message, communication or wireless communications portal in the concrete band adopting fibre core communication for subsequent use or primary fibre core.
Described employing circuit Insertion Loss comprises two transfer criterions as transfer criterion, one is the criterion of primary circuit switching to extension wire: when any fibre core circuit Insertion Loss value of primary fibre exceedes the handoff threshold value of the circuit Insertion Loss of setting, and the circuit Insertion Loss value of two fibre cores for subsequent use is all on the alarming threshold of the circuit Insertion Loss of setting; Another is the criterion that extension wire switches to primary circuit: when a fibre core circuit Insertion Loss for subsequent use any in two fibre cores for subsequent use exceedes the handoff threshold of setting, and the circuit Insertion Loss average of primary two fibre cores is on the alarming threshold of setting.
The alarming threshold of described circuit Insertion Loss and handoff threshold are the reference values being set in advance in light protected location inside by external interface; the circuit Insertion Loss value adopting protected transmission system can bear is as handoff threshold; alarming threshold, then on handoff threshold, plays a part to give warning in advance.
The optical fiber cable line warning door guard method of wavelength-division system of the present invention, comprises the steps:
1) the alarming threshold P that protected system is allowed is set
alarmwith handoff threshold P
switch;
2) light protected location gathers the luminous power of each optical port, two protected system equipment ports, two primary fibre core ports, and two fibre core ports for subsequent use, totally 6 ports, the luminous power rate gathered is labeled as P respectively
tx, P
rx, P
t1, P
r1, P
t2, P
r2, as shown in Figure 2;
3) by extension wire, the luminous power of local terminal is passed to the other end;
4) Insertion Loss of every root fibre is calculated:
The Insertion Loss of the first primary fibre core (3): P
1 t1-P
2 r1
The Insertion Loss of the second primary fibre core (4): P
2 t1-P
1 r1
The Insertion Loss of the first fibre core for subsequent use (5): P
1 t2-P
2 r2
The Insertion Loss of the second fibre core for subsequent use (6): P
2 t2-P
1 r2
Wherein: P
1 t1represent the primary luminous power of left end OLP equipment (1);
P
1 t2represent the back lit power of left end OLP equipment (1);
P
1 r1represent the primary receipts luminous power of left end OLP equipment (1);
P
1 r2represent the receipts luminous power for subsequent use of left end OLP equipment (1);
P
2 t1represent the primary luminous power of right-hand member OLP equipment (2);
P
2 t2represent the back lit power of right-hand member OLP equipment (2);
P
2 r1represent the primary receipts luminous power of right-hand member OLP equipment (2);
P
2 r2represent the receipts luminous power for subsequent use of right-hand member OLP equipment (2);
5) criterion is set up:
(1) primary circuit switching to the condition of extension wire is: when a primary fibre core circuit Insertion Loss value any in primary fibre core exceed handoff threshold and the circuit Insertion Loss value of two fibre cores for subsequent use all on alarming threshold, namely satisfy condition:
P
1 T1-P
2 R1＜P
switch?or?P
2 T1-P
1 R1＜P
switch
P
1 T2-P
2 R2＞P
alarm?and?P
2 T2-P
1 R2＞P
alarm；
(2) extension wire switches to the condition of primary circuit and is: when a fibre core circuit Insertion Loss value for subsequent use any in fibre core for subsequent use exceed handoff threshold and the circuit Insertion Loss value of two primary fibre cores all on alarming threshold, namely satisfy condition:
P
1 T2-P
2 R2＜P
switch?or?P
2 T2-P
1 R2＜P
switch
P
1 T1-P
2 R1＞P
alarm?and?P
2 T1-P
1 R1＞P
alarm。
Embodiment one as shown in Figure 3; when the primary optical fiber of first paragraph D of this wavelength-division system blocks; light protected location detects that the difference of the primary luminous power of fibre core utilizing emitted light mouth and the luminous power of receiving port reduces; and fibre core Insertion Loss for subsequent use is normal; occur normally to switch; be that the business of transmission system is able to protection & restoration, namely this section of Insertion Loss alarm, switches.Although subsequent paragraph F also detects that luminous power reduces, but because utilizing emitted light mouth synchronously reduces with the luminous power receiving light mouth, so the Insertion Loss of the fibre core of work at present is constant, do not reach the condition of transfer criterion, so without the need to switching, thus avoid the phenomenon generation of switching confusion, ensure that the safety and reliability of switching, although i.e. subsequent paragraph luminous power alarm, circuit Insertion Loss is normal, therefore without the need to switching, working properly.
Embodiment two as shown in Figure 4, assuming that existing 4 ripples of wavelength-division system, when needing that according to traffic scheduling 4 ripples are cut 3 ripples, the luminous power of whole system will decline 6dB, cause the receipts luminous power of whole wavelength-division circuit, but because luminous power and received power synchronously decline, therefore circuit Insertion Loss is constant, according to criterion A, does not meet switching condition, therefore without the need to switching, avoid switching by mistake.Continue supposition, assuming that wavelength-division system is current only have 1 ripple, need newly-increased 3 ripples, system luminous power will increase 6dB, if after a period of time there is the decay of 4 ~ 6dB in circuit, this may be fatal to wavelength-division system, is only transfer criterion with received optical power, light protective device may be caused to switch and the risk do not switched; And according to the present invention, the risk that the criterion based on Insertion Loss both can not occur switch and not switch, also can not increase needs aperiodically according to the change of line condition, the maintenance work of change handoff threshold.
In Fig. 4:
D ' expression: 4 ripples are cut 3 ripples by end office (EO), system luminous power is by reduction by 6 dB;
F ' expression: the 6dB although whole OTM section luminous power all will decline, because luminous power and received power synchronously decline, therefore circuit Insertion Loss is constant, therefore without the need to switching, avoids switching by mistake.
Claims (3)
1. the optical fiber cable line warning door guard method of a wavelength-division system, it is characterized in that, adopt circuit Insertion Loss as transfer criterion, described circuit Insertion Loss is that the luminous power of each port of foundation light protected location calculates, the received optical power of local terminal light protected location is specifically deducted by the luminous power of the emission port of pairing light protected location, obtain the circuit Insertion Loss value of root fibre core, the luminous power of described pairing light protected location informs local terminal light protected location by the mode of communication or a message, communication or wireless communication mode in the band of concrete employing fibre core for subsequent use communication or primary fibre core, the circuit Insertion Loss value of primary fibre core and fibre core for subsequent use is detected successively according to above-mentioned account form, described employing circuit Insertion Loss comprises two transfer criterions as transfer criterion, one is the criterion of primary circuit switching to extension wire: when any fibre core circuit Insertion Loss value of primary fibre exceedes the handoff threshold value of the circuit Insertion Loss of setting, and the circuit Insertion Loss value of two fibre cores for subsequent use is all on the alarming threshold of the circuit Insertion Loss of setting, another is the criterion that extension wire switches to primary circuit: when a fibre core circuit Insertion Loss for subsequent use any in two fibre cores for subsequent use exceedes the handoff threshold of setting, and the circuit Insertion Loss average of primary two fibre cores is on the alarming threshold of setting, specifically comprise the steps:
1) the alarming threshold P that protected system is allowed is set
alarmwith handoff threshold P
switch;
2) light protected location gathers the luminous power of each optical port, two protected system equipment ports, two primary fibre core ports, and two fibre core ports for subsequent use, totally 6 ports, the luminous power gathered is labeled as P respectively
tx, P
rx, P
t1, P
r1, P
t2, P
r2;
3) by extension wire, the luminous power of local terminal is passed to the other end;
4) Insertion Loss of every root fibre is calculated:
The Insertion Loss of the first primary fibre core (3): P
1 t1– P
2 r1
The Insertion Loss of the second primary fibre core (4): P
2 t1– P
1 r1
The Insertion Loss of the first fibre core for subsequent use (5): P
1 t2– P
2 r2
The Insertion Loss of the second fibre core for subsequent use (6): P
2 t2– P
1 r2
Wherein: P
1 t1represent the primary luminous power of left end OLP equipment (1);
P
1 t2represent the back lit power of left end OLP equipment (1);
P
1 r1represent the primary receipts luminous power of left end OLP equipment (1);
P
1 r2represent the receipts luminous power for subsequent use of left end OLP equipment (1);
P
2 t1represent the primary luminous power of right-hand member OLP equipment (2);
P
2 t2represent the back lit power of right-hand member OLP equipment (2);
P
2 r1represent the primary receipts luminous power of right-hand member OLP equipment (2);
P
2 r2represent the receipts luminous power for subsequent use of right-hand member OLP equipment (2);
5) criterion is set up:
(1) primary circuit switching to the condition of extension wire is: when a primary fibre core circuit Insertion Loss value any in primary fibre core exceed handoff threshold and the circuit Insertion Loss value of two fibre cores for subsequent use all on alarming threshold, namely satisfy condition:
P
1 T1–P
2 R1<P
switch?or?P
2 T1–P
1 R1<P
switch
P
1 T2–P
2 R2>P
alarm?and?P
2 T2–P
1 R2>P
alarm；
(2) extension wire switches to the condition of primary circuit and is: when a fibre core circuit Insertion Loss value for subsequent use any in fibre core for subsequent use exceed handoff threshold and the circuit Insertion Loss value of two primary fibre cores all on alarming threshold, namely satisfy condition:
P
1 T2–P
2 R2<P
switch?or?P
2 T2–P
1 R2<P
switch
P
1 T1–P
2 R1>P
alarm?and?P
2 T1–P
1 R1>P
alarm。
2. the optical fiber cable line warning door guard method of wavelength-division system according to claim 1; it is characterized in that; the alarming threshold of described circuit Insertion Loss and handoff threshold are the reference values being set in advance in light protected location inside by external interface; the circuit Insertion Loss value adopting protected transmission system can bear is as handoff threshold; alarming threshold, then on handoff threshold, plays a part to give warning in advance.
3. the optical fiber cable line warning door guard method of wavelength-division system according to claim 1, is characterized in that, the luminous power of described each port is that each protected location carries out luminous power voluntarily and detects and obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070988.8A CN101931486B (en) | 2009-10-27 | 2009-10-27 | Optical fiber line warning door line protection method of wavelength division system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070988.8A CN101931486B (en) | 2009-10-27 | 2009-10-27 | Optical fiber line warning door line protection method of wavelength division system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101931486A CN101931486A (en) | 2010-12-29 |
| CN101931486B true CN101931486B (en) | 2014-12-31 |
Family
ID=43370431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910070988.8A Active CN101931486B (en) | 2009-10-27 | 2009-10-27 | Optical fiber line warning door line protection method of wavelength division system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101931486B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684810B (en) * | 2012-01-18 | 2015-07-22 | 徐志国 | Optical network protection method, optical link switching control device and optical link switching control system |
| CN104348541B (en) * | 2013-07-25 | 2017-05-03 | 中国移动通信集团湖北有限公司 | WDM light power early warning method and device |
| CN110086530A (en) * | 2019-04-15 | 2019-08-02 | 北京盟力星科技有限公司 | A kind of Cable's Fault alarm system |
| CN110995336B (en) * | 2019-11-15 | 2021-05-11 | 武汉光迅信息技术有限公司 | OLP transmission link switching method and device, storage medium and OLP |
| CN112350772A (en) * | 2020-10-23 | 2021-02-09 | 西安空间无线电技术研究所 | Method for testing waveguide by using insertion loss value |
| CN114826388B (en) * | 2022-04-19 | 2022-11-29 | 北京中昱光通科技有限公司 | Novel zero-insertion-loss OLP optical line protection switching monitoring method and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333454A (en) * | 2000-07-12 | 2002-01-30 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring system |
| CN1479477A (en) * | 2002-08-30 | 2004-03-03 | 华为技术有限公司 | Light power automatic control method |
| CN1677072A (en) * | 2004-03-30 | 2005-10-05 | 华为技术有限公司 | Optical fiber fault automatic monitoring method |
| CN101252393A (en) * | 2008-04-01 | 2008-08-27 | 武汉光迅科技股份有限公司 | Optic cable automatic monitoring system with optical fiber automatic switch unit |
| CN201323583Y (en) * | 2008-12-12 | 2009-10-07 | 中国移动通信集团山东有限公司 | switching system of optical-fibre circuit and monitoring and switching device |
-
2009
- 2009-10-27 CN CN200910070988.8A patent/CN101931486B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333454A (en) * | 2000-07-12 | 2002-01-30 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring system |
| CN1479477A (en) * | 2002-08-30 | 2004-03-03 | 华为技术有限公司 | Light power automatic control method |
| CN1677072A (en) * | 2004-03-30 | 2005-10-05 | 华为技术有限公司 | Optical fiber fault automatic monitoring method |
| CN101252393A (en) * | 2008-04-01 | 2008-08-27 | 武汉光迅科技股份有限公司 | Optic cable automatic monitoring system with optical fiber automatic switch unit |
| CN201323583Y (en) * | 2008-12-12 | 2009-10-07 | 中国移动通信集团山东有限公司 | switching system of optical-fibre circuit and monitoring and switching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101931486A (en) | 2010-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101931486B (en) | Optical fiber line warning door line protection method of wavelength division system | |
| CN102932056B (en) | The method and apparatus of a kind of sensed light signal performance and diagnosis optical fiber link failure | |
| CN102136876B (en) | Light line protection acceleration circuit, light line protection system and method | |
| CN101296062B (en) | Double-channel data transmission method in optical fiber longitudinal differential protection | |
| CN104393914B (en) | A multiplex route recovering method for an optical fiber differential protection device | |
| CN101826917A (en) | Optical line protection device and system | |
| CN102437875A (en) | Automatic optical fiber switching device for intensive wavelength division multiplexing system | |
| CN102611499B (en) | Method for realizing ODUK (Optical Channel Data Unit) protection switching by crossed disc of OTN (Optical Transport Network) equipment | |
| CN100546226C (en) | A kind of method of discrimination and system that is used for the startup protection exchanging system of optical-fiber network | |
| CN202488457U (en) | Optical fiber automatic switching device of dense wavelength division multiplexing system | |
| CN202334524U (en) | Optical link protecting system realizing single-end monitoring | |
| CN205195707U (en) | Harmless auto -change over device of 2M optic fibre | |
| CN201114070Y (en) | Optical protector for preventing single operator failure | |
| CN101848034A (en) | Optical path protecting device and method | |
| CN209930259U (en) | Intelligent optical cable monitoring system with optical cable protection function | |
| CN203608203U (en) | High-speed electronic switch type optical cable protector | |
| CN100571078C (en) | Optical communication protection method | |
| CN103607239B (en) | Simple optical fiber tester | |
| WO2012097611A1 (en) | Method and device for automatic protection switching in optical network | |
| CN202679365U (en) | Optical-fiber protector | |
| CN105591688B (en) | A kind of optical fiber switch protecting system suitable for optical fiber switch protecting equipment | |
| CN105119652A (en) | Optical cable main/standby routing controller | |
| CN101094141B (en) | Method and system for protecting voice channel of access network, and optical line terminal | |
| CN101527598A (en) | Transmission method based on optical transmission equipment failure or power failure | |
| CN104378153A (en) | PON backbone line protection device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160921 Address after: 430074 Wuhan, Hongshan Province District Road, Department of mail, No. 88 hospital Patentee after: Wuhan Accelink Technologies Co., Ltd. Address before: 430074 Wuhan, Hongshan Province District Road, Department of mail, No. 88 hospital Patentee before: Guangxun Science-Technology Co., Ltd., Wuhan |