CN109495163A - A kind of multi-channel module loss of signal alarm processing unit and method - Google Patents
A kind of multi-channel module loss of signal alarm processing unit and method Download PDFInfo
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- CN109495163A CN109495163A CN201811543633.1A CN201811543633A CN109495163A CN 109495163 A CN109495163 A CN 109495163A CN 201811543633 A CN201811543633 A CN 201811543633A CN 109495163 A CN109495163 A CN 109495163A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/038—Arrangements for fault recovery using bypasses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
Abstract
A kind of multi-channel module loss of signal alarm processing unit and method, based on optical module receiver and host, it further include alarm generation module, alarm filter module and main control module, optical module receiver output channel indication signal gives alarm filter module, and alarm filter module is filtered the channel indication signal that optical module receiver exports；The signal that generation module receives the output of alarm filter module is alerted, judges whether to generate optical module alarming signal；Main control module is communicated with host, main control module receiving host initializing signal, resets internal alarm indication signal；It after the completion of main control module initialization, exports initialization completion signal and gives alarm generation module, inform that alarm generation module main control module can receive alarm signal；Main control module receives and saves the alarm signal of alarm generation module output simultaneously.It can accelerate to generate optical module alarming signal using the present invention, solve automatic protection switching timeout issue.
Description
Technical field
The present invention relates to optical communication technology fields, and in particular to a kind of multi-channel module loss of signal alarm processing unit and
Method.
Background technique
In optical communication equipment, the effect of pretection switch is in the failure of some functional unit or not up to functional requirement
It waits, system equipment can voluntarily be switched to backup functionality unit, so that user's communication be protected not to be interrupted.Pretection switch triggering
Condition includes the index of some hardness, while also including the index voluntarily configured.Rigid index cannot be arranged, the condition at
Vertical automatic trigger pretection switch.Rigid index has very much, and wherein loss of signal alarm (LOS, lost of signal) is being protected
It leads and changes the key index that trigger protection is switched.Since optical communication system pretection switch is assigned to the time of each processing system
It is limited, it is often desirable that The faster the better for the speed of each system processing response.LOS signal is obtained first by optical module in usual system
It takes and host (HOST) is reported to handle.Automatic protective system proposes higher want to module LOS response time and processing time
It asks.In multichannel CFP module, LOS triggers host (HOST) system after generating, and host (HOST) system needs in the worst cases
Channel LOS alarm can be confirmed by wanting corresponding MDIO querying command, this just needs module to the greatest extent may be used the LOS response time alerted
Can it is short, to alarm register update it is fast as far as possible, to guarantee that LOS signal can correctly be confirmed by veneer.
Current common way is using software inquiry optical mode block status register, and generating LOS alarm signal is also to pass through
Optical module in house software register generates, and speed is slow, in multiple optical module cascade systems, since each optical module is accumulated
Response time will exceed automatic protection switching distribution time, so as to cause automatic protection switching time requirement is unable to satisfy.
Summary of the invention
A kind of multi-channel module loss of signal alarm processing unit and method proposed by the present invention can solve traditional related skill
The technical problem of art automatic protection switching time-out.
To achieve the above object, the invention adopts the following technical scheme:
A kind of multi-channel module loss of signal alarm processing unit is based on optical module receiver and host, further includes alarm
Generation module, alarm filter module and main control module, wherein
Optical module receiver output channel indication signal gives alarm filter module, and alarm filter module is to optical module receiver
The channel indication signal of output is filtered, it is ensured that is received correct optical module alarming signal, is eliminated external disturbance；
The signal that generation module receives the output of alarm filter module is alerted, judges whether to generate optical module alarming signal；
Main control module is communicated with host, main control module receiving host initializing signal, resets internal alarm instruction letter
Number；
After the completion of main control module initialization, exports initialization completion signal and give alarm generation module, inform that alarm generates mould
Block main control module can receive alarm signal；Main control module receives and saves the alarm letter of alarm generation module output simultaneously
Number.
Further, the main control module and host are communicated by the realization of MDIO interface, and the main control module is to host report
Module alarm status information is accused, in case host inquires loss of signal alarm status information at any time after receiving RX_LOS signal.
Further, the alarm filter module is filtered the channel indication signal that optical module receiver exports, tool
Body includes:
After the alarm filter module samples channel signal loss by low get higher using high-frequency clock, start timing
Device, timing is to setting value, then judges that channel signal loses whether indication signal still maintains as high level signal；
If remaining high level, it is effective to confirm that channel signal loses indication signal；
If it is low level is become, then confirm that channel signal loss indication signal is invalid, to filter high level holding
Time very short interference signal.
Further, the alarm generation module further includes generating loss of signal alarm signal reporting to host, guarantees letter
Number lose alarm the response time it is timely.
It further, include hardware circuit inside the alarm generation module, the hardware circuit is by defining RX_LOS
Hardware pins signal reports LOS signal to host, and hardware RX_LOS signal generation time is to generate from alarm generation module is practical
LOS captures the time of LOS signal, up to 200us to module RX_LOS hardware pins.
Further, the hardware RX_LOS generates logic are as follows:
RX_LOS=Lane0_LOS | Lane1_LOS | Lane2_LOS | Lane3_LOS | Lane4_LOS | Lane5_LOS |
Lane6_LOS|Lane7_LOS|Lane8_LOS|Lane9_LOS
Wherein, RX_LOS signal is the loss of signal alarm signal that optical module reports host, by defining optical module
One hardware pins signal reporting is to host；
Lane0_LOS to Lane9_LOS signal is that each channel signal of optical module receiver loses alarm indication signal.
Further, after the optical module receiver generates LOS signal, after hardware captures LOS signal, pass through hardware pipe
Foot exports RX_LOS warning information, while hardware generates RX_LOS Interrupt signal all the way again, connect with main control module, touching
Update of the main control module software to LOS alarm register is sent out, to prepare the inquiry data that host alerts main control module LOS.
Another party's invention, the present invention disclose a kind of multi-channel module loss of signal alarm processing method, comprising the following steps:
By MDIO mouthfuls of transmission optical module initialization commands, main control module receives this order initialization alarm for S100, host
Status register；Main control module completes initialization and sends initialization completion order to host, informs that host optical module has been completed
Initialization；Main control module sends initialization to alarm generation module and completes order simultaneously, and notice alarm generation module can start
Generate alarm signal；
S200, optical module receiver receive optical signal, error detection are carried out, if there is error code will issue alarm signal, institute
It states alarm signal to generate by channel number, while generating multichannel alarm signal；
The multichannel alarm signal that S300, optical module receiver export passes through alarm filter module, alarm filter mould first
Block carries out timing confirmation using timer and obtains true alarm signal to filter interference signal；
S400, alarm generation module receive alarm filter module output signal, generate true alarm signal, generate alarm
Interrupt signal is sent to host, while being sent to main control module, updates the alarm status register of main control module；
S500, response of host alert interrupt signal, by MDIO read main control module alarm status register, host from
And differentiates which optical module channel and generate alarm indication signal；Main control module issues indication signal to alarm generation module simultaneously,
Delete alarm interrupt request singal.
Further, alarm filter module is using timer progress timing confirmation in the step 300, with filtering interference letter
Number, obtain true alarm signal；
Include:
Alarm filter module carries out delay judgement to each channel LOS signal is received；If channel LOS signal current value
For height, be delayed 50ns, then whether sense channel LOS current value is high, if being still height, illustrates channel LOS alarm effectively,
Otherwise invalid.
Further, step S400 specifically includes alarm generation module to the channel LOS by the output of alarm filter module
Signal carries out or operation；When there is channel to send LOS alarm, then loss of signal alarm indication signal is generated, while being sent to master
Control module and host.
As shown from the above technical solution, it can accelerate to generate optical module alarming signal using the present invention, solve automatic protection
Switch timeout issue.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention；
Fig. 2 is that LOS of the present invention generates timing requirements schematic diagram；
Fig. 3 is flow chart of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
As shown in Figure 1, multi-channel module loss of signal alarm processing unit described in the embodiment of the present invention is based on optical module
Receiver and host further include alarm generation module, alarm filter module and main control module, wherein the output of optical module receiver
Channel indication signal gives alarm filter module, and alarm filter module carried out the channel indication signal that optical module receiver exports
Filter, it is ensured that receive correct optical module alarming signal, eliminate external disturbance.
Optical module alarming generation module receives the signal of alarm filter module output, judges whether to generate optical module alarming letter
Number.
Main control module receiving host initializing signal resets internal alarm indication signal.After the completion of initialization, output is initial
Change and complete signal to generation module is alerted, informs that alarm generation module main control module can receive alarm signal.Main control module
The alarm signal of alarm generation module output is received simultaneously, and main control module saves this alarm signal.Main control module and host carry out
Communication realizes by MDIO interface and communicates that host can be with query warning signal by this interface.
On the other hand, the embodiment of the present invention is also disclosed a kind of multi-channel module loss of signal alarm processing method, including with
Lower step:
S100, optical mode initialization block, light emitting module initialization command under host, host pass through at the beginning of MDIO mouthfuls of transmission optical modules
Beginningization order, main control module receive this order initialization alarm status register.Main control module is completed initialization and is sent to host
Order is completed in initialization, informs that host optical module has been completed to initialize.Main control module is sent just to alarm generation module simultaneously
Beginningization completes order, and notice alarm generation module can start to generate alarm signal.
S200, optical module receiver receive optical signal, carry out error detection, if there is error code will issue light alarm signal,
The alarm signal is generated by channel number, can generate multichannel alarm signal simultaneously.
The multichannel alarm signal first choice that S300, optical module receiver export passes through alarm filter module, alarm filter mould
Plate carries out timing confirmation using timer and obtains true alarm signal to filter interference signal.
S400, alarm generation module receive alarm filter module output signal, generate true alarm signal, generate alarm
Interrupt signal is sent to host, while being sent to main control module, updates the alarm status register of main control module.
S500, response of host alert interrupt signal, by MDIO read main control module alarm status register, host from
And it can differentiate which optical module channel and generate alarm indication signal.Main control module issues instruction letter to alarm generation module simultaneously
Number, delete alarm interrupt request singal.
It elaborates below to the present embodiment:
Multi-channel module loss of signal alarm processing unit described in the present embodiment includes:
Alarm filter module
In order to avoid maloperation, the dropout signal sent to each channel is needed to confirm, using delay confirmation
Method.
After sampling channel signal loss by low get higher using high-frequency clock, start timer, timing to certain value
(50ns), then judge that channel signal loses whether indication signal still maintains as high level signal.If remaining high level,
It is effective to can be confirmed that channel signal loses indication signal；If it is low level is become, then confirm that channel signal loses indication signal
In vain.To filter the very short interference signal of high-level retention time.
Alert generation module
It generates loss of signal alarm signal reporting to give host (HOST), guarantees that the loss of signal alarm response time is timely.Mould
Specific implementation is realized by hardware circuit inside block, and hardware circuit realizes that the optical module correct and working properly from initial configuration connects
It receives device and obtains loss of signal alarm alarm LOS, be reported to host (HOST).
10*10G optical module reports LOS signal, hardware RX_LOS letter to HOST by defining RX_LOS hardware pins signal
Number generation time, i.e., from the module practical time for generating LOS and capturing to module RX_LOS hardware pins LOS signal, up to
200us。
Hardware RX_LOS generates logic:
RX_LOS=Lane0_LOS | Lane1_LOS | Lane2_LOS | Lane3_LOS | Lane4_LOS | Lane5_LOS |
Lane6_LOS|Lane7_LOS|Lane8_LOS|Lane9_LOS
Wherein RX_LOS signal is the loss of signal alarm signal that optical module reports host (HOST), by defining optical mode
One hardware pins signal reporting of block gives host (HOST).
Lane0_LOS to Lane9_LOS signal is that each channel signal of optical module receiver loses alarm indication signal.
After alarm generation module detects dropout, pass through loss of signal alarm indication signal within 200us for mould
Block signal is lost alarm status and is reported to host.Meanwhile it alerting generation module and sending loss of signal alarm to warning processing module
Interrupt requests (RX_LOS Interrupt), warning processing module update loss of signal alarm register, in case host passes through life
Inquiry channel signal is enabled to lose alarm status.
It is as follows that loss of signal alarm interrupt request singal generates logic:
Loss of signal alarm interrupt request singal (RX_LOS Interrupt)=Lane0_LOS | Lane1_LOS |
Lane2_LOS|Lane3_LOS|Lane4_LOS|Lane5_LOS|Lane6_LOS|Lane7_LOS|Lane8_LOS|Lane9_
LOS
RX_LOS Interrupt timing is see Fig. 2.
After optical module receiver generates LOS signal, after hardware captures LOS signal, RX_LOS is exported by hardware pins
Warning information, while hardware generates RX_LOS Interrupt signal all the way again, connect with warning processing module, trigger module is soft
Update of the part to LOS alarm register, to prepare the inquiry data that HOST alerts module LOS, i.e. RX_LOS and RX_LOS
Interrupt signal is effectively enabled simultaneously when module LOS is generated.
Generation module triggering LOS signal alarm is alerted by following constraint:
(1) output LOS signal be 10 channel los state of optical module road or operation, i.e.,
RX_LOS=Lane0_LOS | Lane1_LOS | Lane2_LOS | Lane3_LOS | Lane4_LOS | Lane5_LOS |
Lane6_LOS|Lane7_LOS|Lane8_LOS|Lane9_LOS
(2) module channels only from normal condition to los state when just trigger RX_LOS alarm report, if extensive from LOS
Again to normal condition, alerts generation module and report LOS no alarm state；
(3) the RX_LOS Interrupt signal that alarm generation module generates, in the presence of LOS continues, with side
Wave period mode triggers warning processing module and updates the deposit of LOS alarm status, with the trigger mode for preventing alarm generation module lasting
Block software processing LOS is alerted and is caused occupied the case where can not handling other tasks appearance of optical module MCU.Alert generation module
To the RX_LOS Interrupt signal of module, high level continues 500us, and within this 500us, LOS disappears or other channels
LOS is generated, and does not influence to alert generation module output RX_LOS Interrupt high level 500us delay；It is most short after 500us
There is the low level output of 40ns, RX_LOS Interrupt signal could be triggered again later, even if having within this 40ns time
LOS exists or generates；
(4) main control module handles task in the failing edge triggering LOS of RX_LOS Interrupt signal, in the height of 500us
In level period, the LOS that each channel generates is both needed to be latched in alarm generation module los state register, even if there is channel LOS to disappear
It loses, there is LOS record in this channel in latch register.Alarm generation module latch register, which is read, to be removed；
(5) in optical module initial phase, optical module MDIO interface high-impedance state can not be communicated, and optical module alarming is invalid,
Optical module performance amount monitoring data is insincere, and optical module init state (Initialize state) longest continues 2.5s.Light
Module is completed to report INIT_DONE mark module to initialize HOST after init state (Initialize state), can
To establish communication and the inquiry of performance amount, meanwhile, main control module needs to trigger INIT_DONE signal to alarm generation module, informs
Alarm generation module can handle LOS signal, and the INIT_DONE of main control module triggering is not otherwise received in alarm generation module
Before state, alarm generation module externally reports no LOS alarm status, i.e. RX_LOS and RX_LOS Interrupt reports nothing
Alarm；
Main control module
Inside modules channel alarm register real-time update is believed in real time with guaranteeing that host can obtain module to the inquiry of module
Number lose warning information.
Warning processing module handles RX_LOS Interrupt signal with external interrupt mode, in RX_LOS Interrupt
Failing edge trigger interrupt processing, module acquisition LOS information for obtaining from alarm generation module los state latch register,
The position LOS of each channel alarm register is updated, to prepare HOST inquiry.
By MDIO interface communication between warning processing module and host (HOST), alerted to host (HOST) reporting modules
Status information, in case host inquires loss of signal alarm status information at any time after receiving RX_LOS signal.
The external interrupt priority of warning processing module processing RX_LOS Interrupt is needed lower than host (HOST)
MDIO interface communication interrupts, to guarantee that MDIO interface communication is not interrupted by RX_LOS Interrupt interruption.
Illustrate the processing method of the embodiment of the present invention in conjunction with Fig. 3:
1, the initialization of optical module main control module completion optical module first, the configuration each receiving channel of optical module
SERDERS parameter, transmitting optical power, module clock etc. guarantee that each function of optical module correctly works
2, received optical signal is converted to electric signal by optical module receiver, and carries out bit error analyzing, and output channel LOS
Signal.
When channel is there are when error code, LOS signal is height；When channel is without error code, LOS is low.This signal reflects channel in real time
Error condition.
3, alarm filter module carries out delay judgement to each channel LOS signal is received.If channel LOS signal is current
Value is height, and be delayed 50ns, then whether sense channel LOS current value is high.If being still height, illustrate that LOS alarm in channel has
Effect；Otherwise invalid.
4, alarm generation module is to the progress of channel LOS signal or operation by the output of alarm filter module.When there is channel
When sending LOS alarm, then loss of signal alarm indication signal is generated, while being sent to main control module and host (host).
5, main control module response signal loses alarm request, updates alarm status content of registers.
6, after host receives alarm, MDIO order is issued to main control module, reads current alert state from main control module.
7, host carries out subsequent operation processing according to alarm status value, is not limited only to carry out pretection switch etc..
It can accelerate to generate optical module alarming signal using the embodiment of the present invention, solve automatic protection switching timeout issue.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of multi-channel module loss of signal alarm processing unit is based on optical module receiver and host, it is characterised in that: also
Including alarm generation module, alarm filter module and main control module, wherein
Optical module receiver output channel indication signal gives alarm filter module, and alarm filter module exports optical module receiver
Channel indication signal be filtered, it is ensured that receive correct optical module alarming signal, eliminate external disturbance；
The signal that generation module receives the output of alarm filter module is alerted, judges whether to generate optical module alarming signal；
Main control module is communicated with host, main control module receiving host initializing signal, resets internal alarm indication signal；
After the completion of main control module initialization, exports initialization completion signal and give alarm generation module, inform alarm generation module master
Control module can receive alarm signal；Main control module receives and saves the alarm signal of alarm generation module output simultaneously.
2. multi-channel module loss of signal alarm processing unit according to claim 1, it is characterised in that: the master control mould
Block is communicated with host by the realization of MDIO interface, and the main control module is to host report module alarm status information, in case host
Inquire loss of signal alarm status information at any time after receiving RX_LOS signal.
3. multi-channel module loss of signal alarm processing unit according to claim 2, it is characterised in that: described to alert
Filter module is filtered the channel indication signal that optical module receiver exports, and specifically includes:
After the alarm filter module samples channel signal loss by low get higher using high-frequency clock, start timer, meter
When to setting value, then judge channel signal lose indication signal whether still maintain as high level signal；
If remaining high level, it is effective to confirm that channel signal loses indication signal；
If it is low level is become, then confirm that channel signal loss indication signal is invalid, to filter high-level retention time
Very short interference signal.
4. multi-channel module loss of signal alarm processing unit according to claim 2, it is characterised in that: the alarm produces
Raw module further includes generating loss of signal alarm signal reporting to host, guarantees that the loss of signal alarm response time is timely.
5. multi-channel module loss of signal alarm processing unit according to claim 4, it is characterised in that: the alarm produces
Raw inside modules include hardware circuit, and the hardware circuit reports LOS to believe in host by defining RX_LOS hardware pins signal
Number, hardware RX_LOS signal generation time is to capture from the alarm practical generation LOS of generation module to module RX_LOS hardware pins
To the time of LOS signal, up to 200us.
6. multi-channel module loss of signal alarm processing unit according to claim 5, it is characterised in that: the hardware
RX_LOS generates logic are as follows:
RX_LOS=Lane0_LOS | Lane1_LOS | Lane2_LOS | Lane3_LOS | Lane4_LOS | Lane5_LOS |
Lane6_LOS|Lane7_LOS|Lane8_LOS|Lane9_LOS
Wherein, RX_LOS signal is the loss of signal alarm signal that optical module reports host, by one that defines optical module
Hardware pins signal reporting is to host；
Lane0_LOS to Lane9_LOS signal is that each channel signal of optical module receiver loses alarm indication signal.
7. multi-channel module loss of signal alarm processing unit according to claim 6, it is characterised in that: the optical module
After receiver generates LOS signal, after hardware captures LOS signal, RX_LOS warning information is exported by hardware pins, while hard
Part generates RX_LOS Interrupt signal all the way again, connect with main control module, and triggering main control module software alerts LOS and deposits
The update of device, to prepare the inquiry data that host alerts main control module LOS.
8. a kind of multi-channel module loss of signal alarm processing method, it is characterised in that: the following steps are included:
By MDIO mouthfuls of transmission optical module initialization commands, main control module receives this order initialization alarm status for S100, host
Register；Main control module completes initialization and sends initialization completion order to host, informs that host optical module has been completed initially
Change；Main control module sends initialization to alarm generation module and completes order simultaneously, and notice alarm generation module can start to generate
Alarm signal；
S200, optical module receiver receive optical signal, error detection are carried out, if there is error code will issue alarm signal, the announcement
Alert signal is generated by channel number, while generating multichannel alarm signal；
The multichannel alarm signal that S300, optical module receiver export passes through alarm filter module first, and alarm filter module is adopted
Timing confirmation is carried out with timer, to filter interference signal, obtains true alarm signal；
S400, alarm generation module receive alarm filter module output signal, generate true alarm signal, generate alarm and interrupt
Signal is sent to host, while being sent to main control module, updates the alarm status register of main control module；
S500, response of host alert interrupt signal, the alarm status register of main control module are read by MDIO, host is to sentence
Which optical module channel does not generate alarm indication signal；Main control module issues indication signal to alarm generation module simultaneously, deletes
Alert interrupt request singal.
9. a kind of multi-channel module loss of signal alarm processing method as claimed in claim 8, it is characterised in that: the step
Alarm filter module carries out timing confirmation using timer and obtains true alarm signal to filter interference signal in 300；
Include:
Alarm filter module carries out delay judgement to each channel LOS signal is received；If channel LOS signal current value is
Height, be delayed 50ns, then whether sense channel LOS current value is high, if being still height, illustrates channel LOS alarm effectively, no
It is then invalid.
10. a kind of multi-channel module loss of signal alarm processing method as claimed in claim 8, it is characterised in that: step
S400 specifically includes alarm generation module to the progress of channel LOS signal or operation by the output of alarm filter module；It is logical when having
When road sends LOS alarm, then loss of signal alarm indication signal is generated, while being sent to main control module and host.
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| CN105656546A (en) * | 2014-11-13 | 2016-06-08 | 中兴通讯股份有限公司 | Method and device for filtering optical signal lost signal burr |
| US20160173197A1 (en) * | 2013-03-14 | 2016-06-16 | Hubbell Incorporated | Methods and apparatuses for improved ethernet path selection using optical levels |
| CN205490557U (en) * | 2016-01-21 | 2016-08-17 | 深圳新飞通光电子技术有限公司 | Multichannel light transceiver module that luminous power is lost warning circuit and is contained it is on average received to multichannel |
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2018
- 2018-12-17 CN CN201811543633.1A patent/CN109495163A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201213260Y (en) * | 2008-06-11 | 2009-03-25 | 中兴通讯股份有限公司 | Fast alarm device and circuit used for automatic protection switch |
| US20160173197A1 (en) * | 2013-03-14 | 2016-06-16 | Hubbell Incorporated | Methods and apparatuses for improved ethernet path selection using optical levels |
| CN105281939A (en) * | 2014-07-17 | 2016-01-27 | 中兴通讯股份有限公司 | Method and device for reporting RXLOS (Receive Loss of Signal Alarm) |
| CN105656546A (en) * | 2014-11-13 | 2016-06-08 | 中兴通讯股份有限公司 | Method and device for filtering optical signal lost signal burr |
| CN205490557U (en) * | 2016-01-21 | 2016-08-17 | 深圳新飞通光电子技术有限公司 | Multichannel light transceiver module that luminous power is lost warning circuit and is contained it is on average received to multichannel |
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