CN104184517B - Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method - Google Patents
Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method Download PDFInfo
- Publication number
- CN104184517B CN104184517B CN201410397811.XA CN201410397811A CN104184517B CN 104184517 B CN104184517 B CN 104184517B CN 201410397811 A CN201410397811 A CN 201410397811A CN 104184517 B CN104184517 B CN 104184517B
- Authority
- CN
- China
- Prior art keywords
- chip
- primary
- standby
- stm
- interface
- 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
Landscapes
- Optical Communication System (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
The invention discloses a protection switching device for a synchronous transfer module (STM)-1 upper optical interface and an achieving method and relates to the field of STM-1 upper optical interfaces for a gigabit passive optical network (GPON) system. The protection switching device comprises a complex programmable logic device (CPLD), an optical interface chip supporting a two-way STM-1 optical interface, a primary STM-1 demultiplexing chip, a primary circuit simulation CES chip, a primary physical layer (PHY) chip, a standby STM-1 demultiplexing chip, a standby CES chip, a standby PHY chip, a switching control chip, an exchange chip and a backing plate. A primary optical path channel of the optical interface chip is connected with the switching control chip sequentially through the primary STM-1 demultiplexing chip, the primary CES chip and the primary PHY chip; and a standby optical path channel of the optical interface chip is connected with the switching control chip sequentially through the standby STM-1 demultiplexing chip, the standby CES chip and the standby PHY chip. According to the protection switching device, the time needed for performing protection switching on the STM-1 upper optical interface is short, and operators' requirements can be met.
Description
Technical field
The present invention relates to GPON (Gigabit Passive Optical Network, gigabit passive optical network) system
STM-1 (STM-Synchronous Transfer Module, synchronous transfer mode) first line of a couplet optical port field and in particular to one
Plant the pretection switch device of STM-1 first line of a couplet optical port for GPON system and implementation method.
Background technology
Belong to the upper connecting port of traditional GPON system in STM-1 interface, the E1 signal that STM-1 optical port demultiplexes out passes through
The special chip with CES technology is packaged into standard ethernet bag, and GPON system transmits Ethernet bag to ONU, and ONU is to ether
After network packet is parsed, obtain E1 signal output.
At present, when existing STM-1 optical port carries out pretection switch, typically 2 optical modules are accessed to the OLT device of GPON
Support 2 road STM-1 optical interface STM-1 optical interface chip, 2 optical modules are according to the detection of STM-1 optical interface chip internal
Mechanism realizes pretection switch.The signal of 1 group of 155M is demultiplexed chip by 1 2M and is demultiplexed by 2 optical modules, obtains 63
Individual 2M signal, 63 2M signals, after 1 CES emulation chip forms standard ethernet message, are sent to through GPON system
ONU side.
With the development of communication technology, the requirement to STM-1 optical port pretection switch required time of the operator of GPON system
More and more higher, and the detection time realized needed for pretection switch by the testing mechanism of STM-1 optical interface chip internal is longer, difficult
To meet the demand of operator.
Content of the invention
For limitation present in prior art, it is an object of the invention to provide a kind of STM- for GPON system
The pretection switch device of 1 first line of a couplet optical port and implementation method, the present invention carries out the time needed for pretection switch to STM-1 first line of a couplet optical port
Shorter, disclosure satisfy that the demand of operator.
For reaching object above, the present invention adopts the technical scheme that：A kind of STM-1 first line of a couplet optical port for GPON system
Pretection switch device, including united dish unit on the STM-1 of the OLT device of GPON system, on described STM-1, united dish unit includes
CPLD, support 2 road STM-1 optical interfaces optical interface chip, primary STM-1 demultiplexing chip, primary circuit simulation CES chip,
Primary PHY chip, standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip, switching control chip, friendship
Change chip and backboard；
Described optical interface chip includes primary path channels and standby path channels, the CPLD master with optical interface chip respectively
It is connected with path channels, standby path channels, switching control chip；The primary path channels of optical interface chip pass sequentially through primary
STM-1 demultiplexing chip, primary CES chip, primary PHY chip are connected with switching control chip；The standby light of optical interface chip
Paths pass sequentially through standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip are connected with switching control chip,
Switching control chip is connected with backboard also by exchange chip；
When described pretection switch device carries out pretection switch, by the primary light path of 1 primary optical module and optical interface chip
Passage is connected, and 1 standby optical module is connected with the standby path channels of optical interface chip；Primary optical module sends master to CPLD
Use Los signal, standby optical module sends standby Los signal to CPLD；CPLD switches logical judgment primary Los letter by default
Number whether lose：
If primary Los signal is not lost, CPLD controls primary optical module to send 1 group of speed to primary STM-1 demultiplexing chip
Rate is the primary signal of 155M, and primary STM-1 demultiplexing chip demultiplexes to primary signal, and forming 1 group of 32 tunnel speed is
The primary demultiplexed signal of 2M；Primary demultiplexed signal is formed the primary of standard by primary CES chip and primary PHY chip
After ether network packet, send to switching control chip；Primary ether network packet is transmitted by switching control chip by exchange chip
It is sent to ONU side to backboard and through GPON system；
If primary Los dropout, CPLD controls standby optical module to send 1 group of speed to standby STM-1 demultiplexing chip
Space signal for 155M, standby STM-1 demultiplexing chip demultiplexes to space signal, and forming 1 group of 32 tunnel speed is 2M
Standby demultiplexed signal；By standby demultiplexed signal by standby CES chip and standby PHY chip form standard standby with
Too after network packet, send to switching control chip；Switching control chip by standby ether network packet by exchange chip transmit to
Backboard is simultaneously sent to ONU side through GPON system.
On the basis of technique scheme, described primary STM-1 demultiplexing chip and standby STM-1 demultiplexing chip are equal
Demultiplex chip from 2M.
A kind of based on above-mentioned pretection switch device for the STM-1 first line of a couplet optical port of GPON system pretection switch method,
Comprise the following steps：
Step one, 1 primary optical module is connected with the primary path channels of optical interface chip, by 1 standby optical module
It is connected with the standby path channels of optical interface chip；Primary optical module to CPLD send primary Los signal, standby optical module to
CPLD sends standby Los signal；By default, CPLD switches whether logical judgment primary Los signal is lost, if it is not, going to
Step 2, otherwise goes to step 3；
It is the primary of 155M that step 2, CPLD control primary optical module demultiplex chip to send 1 group of speed to primary STM-1
Signal, primary STM-1 demultiplexing chip demultiplexes to primary signal, and forming 1 group of 32 tunnel speed is the primary demultiplexing of 2M
Signal；Primary demultiplexed signal is formed after the primary ether network packet of standard by primary CES chip and primary PHY chip,
Send to switching control chip；Primary ether network packet is transmitted to backboard and warp by switching control chip by exchange chip
GPON system is sent to ONU side；
It is the standby of 155M that step 3, CPLD control standby optical module demultiplex chip to send 1 group of speed to standby STM-1
Signal, standby STM-1 demultiplexing chip demultiplexes to space signal, and forming 1 group of 32 tunnel speed is the standby demultiplexing of 2M
Signal；Standby demultiplexed signal is formed after the standby ether network packet of standard by standby CES chip and standby PHY chip,
Send to switching control chip；Standby ether network packet is transmitted to backboard and warp by switching control chip by exchange chip
GPON system is sent to ONU side.
A kind of realization of the pretection switch based on above-mentioned pretection switch device for the STM-1 first line of a couplet optical port of GPON system
Method, comprises the following steps：
Step one, by the mode of operation of united dish optical interface chip on the STM-1 of the OLT device of GPON system by concurrently selecting receipts
Pattern is changed to 2 road direct mode operations；
Step 2, the mode of operation of the chip of the ONU equipment of GPON system is changed to by Ethernet interface sending mode
FIFO pattern；
Step 3, united dish unit on STM-1 is connected and is tested with extraneous test equipment.
On the basis of technique scheme, test equipment described in step 3 includes E1 test instrumentation, transmission equipment, master
With optical module, standby optical module, main crosspoint, PON interface unit, ODN equipment and ONU equipment；Described E1 test instrumentation, master
It is provided with E1 interface with optical module, standby optical module and ONU equipment, described transmission equipment includes primary E1 interface, standby E1
Interface and test E1 interface；
Described in step 3, united dish unit on STM-1 is connected with extraneous test equipment and comprises the following steps：
Primary optical module is connected with the primary path channels of the optical interface chip of united dish unit on STM-1, by standby light
Module is connected with the standby path channels of the optical interface chip of united dish unit on STM-1；Be sequentially connected united dish unit on STM-1,
Main crosspoint, PON interface unit, ODN equipment and ONU equipment；
By the transmission Tx circuit of the E1 interface of ONU equipment, it is connected with the reception Rx circuit of the E1 interface of E1 test instrumentation；Will
The Tx circuit of the E1 interface of E1 test instrumentation, is connected with the test E1 interface Rx circuit of transmission equipment；Transmission equipment is primary
The Tx circuit of E1 interface, is connected with the Rx circuit of the E1 interface of primary optical module；Tx line by the standby E1 interface of transmission equipment
Road is connected with the Rx circuit of the E1 interface of standby optical module.
Compared with prior art, it is an advantage of the current invention that：
The pretection switch device of the present invention include primary STM-1 demultiplexing chip, primary CES chip, primary PHY chip,
Standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip and switching control chip, primary STM-1 demultiplexes core
Piece, primary CES chip and primary PHY chip form primary light path, standby STM-1 demultiplexing chip, standby CES chip and standby
PHY chip forms standby light path.When the present invention carries out the pretection switch of STM-1 first line of a couplet optical port, primary optical module passes through primary light
Road sends primary ether network packet to switching control chip, and standby optical module sends standby ether network packet extremely by standby light path
Switching control chip；Whether CPLD directly loses to judge whether that needs are protected by the primary Los signal of primary optical module
Protective switching.
With prior art, pretection switch is realized by the testing mechanism (i.e. software program) of STM-1 optical interface chip internal
Compare, the present invention can directly pass through CPLD (i.e. hardware) and simply judged to draw to fall the need of carrying out protection
Change.The present invention relies primarily on hardware detection and carries out circuit switching, and cooperation software arrangements pattern realizes pretection switch, its pretection switch
Time is very fast, when being tested by the pretection switch method of the present invention, can significantly shorten the time needed for pretection switch, enter
And meet the demand of operator.
Brief description
Fig. 1 is the structural frames of the pretection switch device of STM-1 first line of a couplet optical port in the embodiment of the present invention for GPON system
Figure；
Fig. 2 is the structured flowchart that on STM-1 in the embodiment of the present invention, united dish unit is connected with extraneous test equipment.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, the pretection switch dress of the STM-1 first line of a couplet optical port for GPON system in the embodiment of the present invention
Put, united dish unit on the STM-1 of OLT (optical line terminal, optical line terminal) equipment including GPON system,
STM-1 upper united dish unit includes CPLD (Complex Programmable Logic Device, complicated programmable logic device
Part), support 2 road STM-1 optical interfaces optical interface chip, primary STM-1 demultiplexing chip, primary CES (circuit simulation) chip,
Primary PHY (physical layer) chip, standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip, switching control chip,
Exchange chip and backboard.
Optical interface chip includes primary path channels and standby path channels, the CPLD primary light with optical interface chip respectively
Paths, standby path channels, switching control chip are connected.The primary path channels of optical interface chip pass sequentially through primary STM-
1 demultiplexing chip, primary CES chip, primary PHY chip are connected with switching control chip；The standby light path of optical interface chip is led to
Road passes sequentially through standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip are connected with switching control chip, switches
Control chip is connected with backboard also by exchange chip.
Primary STM-1 demultiplexing chip in the present embodiment and standby STM-1 demultiplexing chip all demultiplex core from 2M
Piece.
In the embodiment of the present invention based on above-mentioned pretection switch device for the STM-1 first line of a couplet optical port of GPON system protection
Reverse method, comprises the following steps：
S101：1 primary optical module is connected with the primary path channels of optical interface chip, by 1 standby optical module with
The standby path channels of optical interface chip are connected.
S102：Primary optical module sends primary Los (Lost of synchronous, synchronization loss signal) letter to CPLD
Number, standby optical module sends standby Los signal to CPLD；Whether CPLD switches logical judgment primary Los signal by default
Losing, if it is not, going to step S103, otherwise going to step S104.
S103：It is the primary letter of 155M that CPLD controls primary optical module to demultiplex chip 1 group of speed of transmission to primary STM-1
Number, primary STM-1 demultiplexing chip demultiplexes to primary signal, and 1 group of 32 tunnel speed of formation is the primary demultiplexing letter of 2M
Number；Primary demultiplexed signal is consisted of after the primary ether network packet of standard primary CES chip and primary PHY chip, sends out
Deliver to switching control chip.Primary ether network packet is transmitted to backboard and through GPON by switching control chip by exchange chip
System is sent to ONU (Optical Network Unit, optical network unit) side；
S104：It is the standby letter of 155M that CPLD controls standby optical module to demultiplex chip 1 group of speed of transmission to standby STM-1
Number, standby STM-1 demultiplexing chip demultiplexes to space signal, and 1 group of 32 tunnel speed of formation is the standby demultiplexing letter of 2M
Number；Standby demultiplexed signal is consisted of after the standby ether network packet of standard standby CES chip and standby PHY chip, sends out
Deliver to switching control chip.Standby ether network packet is transmitted to backboard and through GPON by switching control chip by exchange chip
System is sent to ONU side.
In the embodiment of the present invention based on above-mentioned pretection switch device for the STM-1 first line of a couplet optical port of GPON system guarantor
The implementation method of protective switching, comprises the following steps：
S201：By the mode of operation of united dish optical interface chip on the STM-1 of the OLT device of GPON system by concurrently selecting receipts mould
Formula is changed to 2 road direct mode operations.
S202：The mode of operation of the chip of the ONU equipment of GPON system is changed to elder generation by Ethernet interface sending mode
Enter first exit pattern.
S203：United dish unit on STM-1 is connected and is tested with extraneous test equipment.
Test equipment includes E1 test instrumentation, transmission equipment, primary optical module, standby optical module, main crosspoint, PON
Interface unit, ODN (Optical Distribution Network, Optical Distribution Network) equipment and ONU equipment；E1 tester
Table, primary optical module, standby optical module and ONU equipment are provided with E1 interface, and transmission equipment includes primary E1 interface, standby E1
Interface and test E1 interface.
When STM-1 upper united dish unit is connected with extraneous test equipment, first by primary optical module and united dish list on STM-1
The primary path channels of the optical interface chip of unit are connected, by standby optical module and the optical interface chip of united dish unit on STM-1
Standby path channels are connected；Then be sequentially connected united dish unit on STM-1, main crosspoint, PON interface unit, ODN equipment and
ONU equipment.
Finally by Tx (transmission) circuit of the E1 interface of ONU equipment, Rx (reception) line with the E1 interface of E1 test instrumentation
Road is connected；By the Tx circuit of the E1 interface of E1 test instrumentation, it is connected with the test E1 interface Rx circuit of transmission equipment；Transmission is set
The Tx circuit of standby primary E1 interface, is connected with the Rx circuit of the E1 interface of primary optical module；The standby E1 of transmission equipment is connect
The Tx circuit of mouth, is connected with the Rx circuit of the E1 interface of standby optical module.
The present invention is not limited to above-mentioned embodiment, for those skilled in the art, without departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (5)
1. a kind of pretection switch device of the STM-1 first line of a couplet optical port for GPON system, including the OLT device of GPON system
STM-1 upper united dish unit it is characterised in that：On described STM-1, united dish unit includes CPLD, supports the light of 2 road STM-1 optical interfaces
Interface chip, primary STM-1 demultiplexing chip, primary circuit simulation CES chip, primary PHY chip, standby STM-1
Demultiplexing chip, standby CES chip, standby PHY chip, switching control chip, exchange chip and backboard；
Described optical interface chip includes primary path channels and standby path channels, the CPLD primary light with optical interface chip respectively
Paths, standby path channels, switching control chip are connected；The primary path channels of optical interface chip pass sequentially through primary STM-
1 demultiplexing chip, primary CES chip, primary PHY chip are connected with switching control chip；The standby light path of optical interface chip is led to
Road passes sequentially through standby STM-1 demultiplexing chip, standby CES chip, standby PHY chip are connected with switching control chip, switches
Control chip is connected with backboard also by exchange chip；
When described pretection switch device carries out pretection switch, by the primary path channels of 1 primary optical module and optical interface chip
It is connected, 1 standby optical module is connected with the standby path channels of optical interface chip；Primary optical module sends primary to CPLD
Los signal, standby optical module sends standby Los signal to CPLD；CPLD switches logical judgment primary Los signal by default
Whether lose：
If primary Los signal is not lost, the CPLD primary optical module of control sends 1 group of speed to primary STM-1 demultiplexing chip and is
The primary signal of 155M, primary STM-1 demultiplexing chip demultiplexes to primary signal, and forming 1 group of 32 tunnel speed is 2M's
Primary demultiplexed signal；Primary demultiplexed signal is consisted of the primary ether of standard primary CES chip and primary PHY chip
After network packet, send to switching control chip；Primary ether network packet is transmitted to the back of the body by switching control chip by exchange chip
Plate is simultaneously sent to ONU side through GPON system；
If primary Los dropout, the CPLD standby optical module of control sends 1 group of speed to standby STM-1 demultiplexing chip and is
The space signal of 155M, standby STM-1 demultiplexing chip demultiplexes to space signal, and forming 1 group of 32 tunnel speed is 2M's
Standby demultiplexed signal；Standby demultiplexed signal is consisted of the standby ether of standard standby CES chip and standby PHY chip
After network packet, send to switching control chip；Standby ether network packet is transmitted to the back of the body by switching control chip by exchange chip
Plate is simultaneously sent to ONU side through GPON system.
2. STM-1 first line of a couplet optical port as claimed in claim 1 pretection switch device it is characterised in that：Described primary STM-1 solution
Multiplexing chip and standby STM-1 demultiplexing chip all demultiplex chip from 2M.
3. a kind of based on pretection switch device described in claim 1 or 2 for the STM-1 first line of a couplet optical port of GPON system protection
Reverse method it is characterised in that：Comprise the following steps：
Step one, 1 primary optical module is connected with the primary path channels of optical interface chip, by 1 standby optical module and light
The standby path channels of interface chip are connected；Primary optical module sends primary Los signal to CPLD, and standby optical module is sent out to CPLD
Send standby Los signal；By default, CPLD switches whether logical judgment primary Los signal is lost, if it is not, going to step
Two, otherwise go to step 3；
It is the primary letter of 155M that step 2, CPLD control primary optical module to demultiplex chip 1 group of speed of transmission to primary STM-1
Number, primary STM-1 demultiplexing chip demultiplexes to primary signal, and 1 group of 32 tunnel speed of formation is the primary demultiplexing letter of 2M
Number；Primary demultiplexed signal is consisted of after the primary ether network packet of standard primary CES chip and primary PHY chip, sends out
Deliver to switching control chip；Primary ether network packet is transmitted to backboard and through GPON by switching control chip by exchange chip
System is sent to ONU side；
It is the standby letter of 155M that step 3, CPLD control standby optical module to demultiplex chip 1 group of speed of transmission to standby STM-1
Number, standby STM-1 demultiplexing chip demultiplexes to space signal, and 1 group of 32 tunnel speed of formation is the standby demultiplexing letter of 2M
Number；Standby demultiplexed signal is consisted of after the standby ether network packet of standard standby CES chip and standby PHY chip, sends out
Deliver to switching control chip；Standby ether network packet is transmitted to backboard and through GPON by switching control chip by exchange chip
System is sent to ONU side.
4. a kind of based on pretection switch device described in claim 1 or 2 for the STM-1 first line of a couplet optical port of GPON system protection
The implementation method switched it is characterised in that：Comprise the following steps：
Step one, by the mode of operation of united dish optical interface chip on the STM-1 of the OLT device of GPON system by concurrently selecting receipts pattern
It is changed to 2 road direct mode operations；
Step 2, the mode of operation of the chip of the ONU equipment of GPON system is changed to first enter by Ethernet interface sending mode
First exit pattern；
Step 3, united dish unit on STM-1 is connected and is tested with extraneous test equipment.
5. the pretection switch of STM-1 first line of a couplet optical port as claimed in claim 4 implementation method it is characterised in that：In step 3
Described test equipment includes E1 test instrumentation, transmission equipment, primary optical module, standby optical module, main crosspoint, PON interface
Unit, ODN equipment and ONU equipment；Described E1 test instrumentation, primary optical module, standby optical module and ONU equipment are provided with E1
Interface, described transmission equipment includes primary E1 interface, standby E1 interface and test E1 interface；
Described in step 3, united dish unit on STM-1 is connected with extraneous test equipment and comprises the following steps：
Primary optical module is connected with the primary path channels of the optical interface chip of united dish unit on STM-1, by standby optical module
It is connected with the standby path channels of the optical interface chip of united dish unit on STM-1；It is sequentially connected united dish unit on STM-1, main friendship
Change unit, PON interface unit, ODN equipment and ONU equipment；
By the transmission Tx circuit of the E1 interface of ONU equipment, it is connected with the reception Rx circuit of the E1 interface of E1 test instrumentation；E1 is surveyed
The Tx circuit of the E1 interface of examination instrument, is connected with the test E1 interface Rx circuit of transmission equipment；The primary E1 of transmission equipment is connect
The Tx circuit of mouth, is connected with the Rx circuit of the E1 interface of primary optical module；By the Tx circuit of the standby E1 interface of transmission equipment with
The Rx circuit of the E1 interface of standby optical module is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397811.XA CN104184517B (en) | 2014-08-13 | 2014-08-13 | Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397811.XA CN104184517B (en) | 2014-08-13 | 2014-08-13 | Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104184517A CN104184517A (en) | 2014-12-03 |
| CN104184517B true CN104184517B (en) | 2017-02-15 |
Family
ID=51965297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410397811.XA Active CN104184517B (en) | 2014-08-13 | 2014-08-13 | Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104184517B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107483103A (en) * | 2017-10-11 | 2017-12-15 | 深圳市新格林耐特通信技术有限公司 | OLT device and OLT device redundancy protected method |
| CN112383347B (en) * | 2020-10-29 | 2022-06-14 | 广东电网有限责任公司韶关供电局 | Power transmission system based on transmission network and leased public network |
| CN113365033A (en) * | 2021-06-04 | 2021-09-07 | 深圳市朗强科技有限公司 | Standby optical module selection method and equipment supporting audio and video data transmission |
-
2014
- 2014-08-13 CN CN201410397811.XA patent/CN104184517B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104184517A (en) | 2014-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101888268B (en) | Method and device for realizing backbone optical fiber protection in Ethernet passive optical network | |
| CN105743566B (en) | A kind of double-PON port ONU optical link pretection switch devices and guard method | |
| EP2772066B1 (en) | Interface and method for enabling interconnection of a host device and a small-formfactor pluggable module | |
| CN104184517B (en) | Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method | |
| EP2451092A1 (en) | Method and system for quickly updating ranging results of optical network unit by optical line terminal | |
| CN101188502A (en) | Ethernet passive optical network transfer unit with telecom E1 interface | |
| CN103281117B (en) | ONU detects also method and the device of adaptive EPON, GPON automatically | |
| KR20160110455A (en) | Optical burst tranport network, node, transmission method and computer storage medium | |
| JP4728697B2 (en) | Optical switch device and optical access network method and optical access network system using the same | |
| JPWO2011145218A1 (en) | Optical communication system and communication apparatus | |
| CN104426625A (en) | Method, device, and system for ranging of passive optical network standby optical fiber link | |
| CN102263587B (en) | The optical port changing method and system of optical network unit | |
| CN104270191B (en) | System and method of implementing wavelength multiplexing function and mutual protection function in wavelength division multiplexing convergent access type double fiber ring optical network | |
| KR101357646B1 (en) | Total PON MAC apparatus and total PON OLT System using the same | |
| CN103220156B (en) | A kind of multiterminal mouth POE for passive light network powers device and method of supplying power to | |
| CN110557693A (en) | Optical network protocol analyzer | |
| CN108092709A (en) | Pretection switch method and optical line terminal, optical network apparatus in passive optical network | |
| CN202121600U (en) | Power failure directly connected Ethernet optical fiber exchanger protected by photoswitch | |
| Kim et al. | Low‐Cost, Low‐Power, High‐Capacity 3R OEO‐Type Reach Extender for a Long‐Reach TDMA‐PON | |
| CN104601216B (en) | A kind of communication equipment protection device | |
| CN104410052A (en) | Current differential protection system based on PON communication and protection method of current differential protection system | |
| CN208971533U (en) | A kind of multiple submerged stations signal transmission network systems | |
| CN203896368U (en) | Dual-port test device provided with PXI board and used for POS protocol consistency testing | |
| Horvath et al. | Implementation of NG-PON2 transmission convergence layer into OPNET modeler | |
| CN101873514A (en) | Quick switch method and system under protected mode in passive optical network and optical network unit |
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 |