CN115913344A - Optical line automatic switching protection system - Google Patents
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- CN115913344A CN115913344A CN202211566932.3A CN202211566932A CN115913344A CN 115913344 A CN115913344 A CN 115913344A CN 202211566932 A CN202211566932 A CN 202211566932A CN 115913344 A CN115913344 A CN 115913344A
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Abstract
The application discloses an optical line automatic switching protection system. Wherein, this system includes: the system comprises at least one optical line automatic switching protector and network management software, wherein a network management platform is used for monitoring data of the at least one optical line automatic switching protector and controlling the optical line automatic switching protector to execute switching operation between a first optical path and a second optical path; the optical line automatic switching protector is used for executing switching operation between the first optical path and the second optical path according to a first working state of a first input port or a first output port of the first optical path and a second working state of a second input port or a second output port of the second optical path based on the first working state and the second working state, and sending corresponding alarm information for prompting that the first line or the second line has a fault. The method and the device solve the technical problem that the state of the optical fiber access cannot be monitored and controlled in real time in the related technology.
Description
Technical Field
The application relates to the technical field of power communication, in particular to an optical line automatic switching protection system.
Background
With the continuous development of communication networks, the number of optical cable lines used for communication services is also increasing, so that currently, a 1+1 line protection mode or a 1.
However, this method has disadvantages in that it is difficult to additionally install a backup communication line different from the optical fiber line and install a terminal control system in an actual implementation process, and a large amount of labor cost and time cost are required. In addition, the method cannot simultaneously monitor the state of the optical fiber access in real time, so that the effectiveness and reliability of the switching protection system cannot be ensured.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides an optical line automatic switching protection system, which at least solves the technical problem that the state of an optical fiber channel cannot be monitored and controlled in real time in the related technology.
According to an aspect of the embodiments of the present application, an optical line automatic switching protection system is provided, including: the system comprises at least one optical line automatic switching protector and network management software, wherein a network management platform is used for monitoring data of the at least one optical line automatic switching protector and controlling the optical line automatic switching protector to execute switching operation between a first optical path and a second optical path, the first optical path is a current working channel of the optical line automatic switching protection system, and the second optical path is a standby working channel of the optical line automatic switching protection system; the optical line automatic switching protector is used for executing switching operation between the first optical path and the second optical path based on a first working state of a first input port or a first output port of the first optical path and a second working state of a second input port or a second output port of the second optical path, and sending corresponding alarm information for prompting that the first optical path or the second optical path has a fault.
Optionally, the optical line automatic switching protector is further configured to directly set a working mode and a switching operation of the optical line automatic switching protector through a key of the switching panel.
Optionally, the first operating state and the second operating state each include: the optical path switching method comprises a normal state and an abnormal state, wherein when first optical power of a first input port or a first output port of a first optical path is not lower than a preset first alarm threshold, a first working state of the first optical path is determined to be a normal state; when the first optical power of the first input port or the first output port of the first optical path is lower than a preset first alarm threshold, or an error code exists in internal communication, or data cannot be received, determining that the first working state of the first optical path is an abnormal state, and sending first alarm information for prompting that the first optical path has a fault; when the second optical power of the second input port or the second output port of the second optical path is not lower than a preset second alarm threshold, determining that the second working state of the second optical path is a normal state; and when the second optical power of the second input port or the second output port of the second optical path is lower than a preset second alarm threshold, or an error code exists in internal communication, or data cannot be received, determining that the second working state of the second optical path is an abnormal state, and sending second alarm information for prompting that the second optical path has a fault.
Optionally, the working mode of the optical line automatic switching protector includes: the automatic mode and the mandatory mode, wherein, the automatic mode includes: the automatic non-return mode is that when the target optical path has a fault, the target transmitting route and the target receiving route of the target optical path are automatically switched to other optical paths from the target optical path, and after the fault of the target optical path is eliminated, optical signals are transmitted on other optical paths; the automatic return mode is that when the target optical path has a fault, the target transmitting route and the target receiving route of the target optical path are automatically switched to other optical paths from the target optical path, and after the fault of the target optical path is eliminated, signals are automatically returned to the target optical path for transmission; and a forced mode for switching the route of the target optical path between the first optical path and the second optical path.
Optionally, the automatic mode is configured to switch the first transmit route and the first receive route of the first optical path from the first optical path to the second optical path when the first optical power is lower than a preset first alarm threshold; or when the second optical power is lower than a preset first alarm threshold, switching a second transmitting route and a second receiving route of the second optical path from the second optical path to the first optical path.
Optionally, the forced mode is configured to switch a target transmission route and a target reception route of the target optical path from the first optical path to the second optical path when the first optical power is smaller than the second optical power and a difference between the second optical power and the first optical power is greater than a preset turn-off threshold; or when the second optical power is smaller than the first optical power and the difference value between the first optical power and the second optical power is larger than a preset turn-off threshold value, switching the target transmitting route and the target receiving route of the target optical path from the second optical path to the first optical path.
Optionally, the optical line automatic switching protector is divided into: the optical line switching protector comprises a first type of optical line automatic switching protector and a second type of optical line automatic switching protector, wherein the first type of optical line automatic switching protector adopts a 1+1 protection mode, and the second type of optical line automatic switching protector adopts a 1.
Optionally, the first type of optical line automatic switching protector includes: the optical fiber coupler comprises a first station and a second station, wherein a first coupler with two output ends and a first optical switch with two switching ends are arranged on the side of the first station, and a second coupler with two output ends and a second optical switch with two switching ends are arranged on the side of the second station, wherein an optical signal sequentially passes through the first output end of the first coupler and the second optical switch from the first station to the second station, and the optical signal sequentially passes through the first output end of the second coupler and the first optical switch from the second station to the first station to form a first loop; the optical signal sequentially passes through the second output end of the first coupler and the switched second optical switch from the first station to reach the second station, and the optical signal sequentially passes through the second output end of the second coupler and the first optical switch from the second station to reach the first station, so that a second loop is formed.
Optionally, the first coupler and the second coupler are 50:50 of the coupler.
Optionally, the second type of optical line automatic switching protector includes: the optical signal sequentially passes through a first output end of the third optical switch and a first output end of the fourth optical switch from the first station to reach the second station, and sequentially passes through a first output end of the second optical switch and a first output end of the first optical switch from the second station to reach the first station, so that a first loop is formed; the optical signal sequentially passes through the second output end of the first optical switch and the second output end of the second optical switch from the first site to reach the second site, and the optical signal sequentially passes through the second output end of the second optical switch and the second output end of the first optical switch from the second site to reach the first site, so that a second loop is formed.
In the embodiment of the application, the network management platform is used for monitoring data of at least one optical line automatic switching protector and controlling the optical line automatic switching protector to execute switching operation between a first optical path and a second optical path; the optical line automatic switching protector is used for executing switching operation between the first optical path and the second optical path based on a first working state of a first input port or a first output port of the first optical path and a second working state of a second input port or a second output port of the second optical path, and sending corresponding alarm information for prompting that the first optical path or the second optical path has a fault. The optical line automatic switching protector detects the data and the state of the optical fiber channel, and the network management platform checks and controls the switching between the main and standby routes in real time, so that the technical problem that the state of the optical fiber channel cannot be monitored and controlled in real time in the related technology is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of an alternative optical line automatic switching protection system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an optional first-type optical line automatic switching protector according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an alternative second-type optical line automatic switching protector according to an embodiment of the present application;
fig. 4 is a schematic diagram of an alternative second-type optical line automatic switching protector switching disk panel according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For better understanding of the embodiments of the present application, the partial nouns or terms appearing during the description of the embodiments of the present application are first interpreted as follows:
optical Line automatic switching protector (OLP): the optical fiber monitoring and protecting system is an automatic monitoring and protecting system which is independent of any transmission system and is completely established on an optical cable physical layer, and can carry out switching protection on a main cable and a spare cable according to the running state of optical fibers so as to ensure the safety and reliability of a communication network. The OLP is transmission equipment working on an optical layer, has the characteristics of independent and transparent transmission signals, safety, reliability, quick fault recovery and the like, and can help a user to establish an unobstructed, highly reliable, safe and flexible optical communication network.
Example 1
According to an embodiment of the present application, an optical line automatic switching protection system is provided, and fig. 1 is a schematic structural diagram of an optional optical line automatic switching protection system according to an embodiment of the present application, as shown in fig. 1, the system includes: a network management platform 11 and at least one optical line automatic switching protector 12, wherein:
the network management platform 11 is configured to monitor data of at least one optical line automatic switching protector 12, and control the optical line automatic switching protector 12 to perform switching operation between a first optical path and a second optical path, where the first optical path is a current working channel of an optical line automatic switching protection system, and the second optical path is a standby working channel of the optical line automatic switching protection system;
the optical line automatic switching protector 12 is configured to execute a switching operation between the first optical path and the second optical path based on a first working state of the first input port or the first output port of the first optical path and a second working state of the second input port or the second output port of the second optical path, and send corresponding warning information for prompting that the first optical path or the second optical path has a fault.
Generally, the olt 12 has a powerful panel manual control capability in addition to the function of remote webmaster platform operation. Specifically, the optical line automatic switching protector 12 can directly set the working mode and switching operation of the optical line automatic switching protector through the keys of the switching panel.
For example, when the optical line automatic switching protector 12 is set in the "local" state, the relevant staff may set the operating mode or the main/standby route of the optical line automatic switching protector 12 by switching keys and indicator lights on the panel of the disk. When the optical line automatic switching protector 12 is in a "remote" state, the relevant staff may monitor the data and state of the optical line automatic switching protector 12 in real time through the OLPScape CS network management software and RJ-45 interfaces attached to the network management platform.
In addition, the optical line automatic switching protector 12 is based on a Windows operating system, a relational database and an ethernet platform, and can be conveniently connected with an optical cable line detection system, an optical transmission management system, a telecommunication resource management system and other systems to realize communication resource sharing.
In the embodiment of the present application, the optical line automatic switching protector 12 is divided into: the optical line switching protector comprises a first type of optical line automatic switching protector and a second type of optical line automatic switching protector, wherein the first type of optical line automatic switching protector adopts a 1+1 protection mode, and the second type of optical line automatic switching protector adopts a 1.
Specifically, the protection mode of the first type of optical line automatic switching protector is shown in fig. 2. The first type of optical line automatic switching protector comprises: the optical signal sequentially passes through the first output end of the first coupler and the second optical switch from the first site A and reaches the second site B, and the optical signal sequentially passes through the first output end of the second coupler and the first optical switch from the second site B and reaches the first site A to form a first loop; and the optical signal sequentially passes through the second output end of the first coupler and the switched second optical switch from the first site A to reach the second site B, and sequentially passes through the second output end of the second coupler and the first optical switch from the second site B to reach the first site A, so that a second loop is formed.
Wherein the first coupler and the second coupler are 50:50 of the coupler. An optical signal of a first site a in the first-type optical line automatic switching protector shown in fig. 2 passes through a first coupler 50, and then simultaneously transmits to a second site B through a main line and a standby line, and a receiving end of the second site B can selectively receive one of the optical signals according to optical powers of the two received signals.
And the protection mode of the second type of the automatic optical line switching protector is shown in fig. 3. The second type of optical line automatic switching protector comprises: the optical signal sequentially passes through a first output end of the third optical switch and a first output end of the fourth optical switch from the first station to reach the second station, and sequentially passes through a first output end of the second optical switch and a first output end of the first optical switch from the second station to reach the first station, so that a first loop is formed; the optical signal sequentially passes through the second output end of the first optical switch and the second output end of the second optical switch from the first station to reach the second station, and the optical signal sequentially passes through the second output end of the second optical switch and the second output end of the first optical switch from the second station to reach the first station, so that a second loop is formed.
Two lines are arranged between a first site a and a second site B in the second type optical line automatic switching protector shown in fig. 3, and if a certain transmission line in the optical transmission system is selected as a main line, the other corresponding transmission line will be used as a spare line for transmitting a next-level signal or not transmitting an optical signal. When the communication quality is reduced due to the fault of the main line or a certain optical fiber/cable of the main line, the receiving end of the main line monitors the power reduction of the signal, automatically switches the transmission signal route from the main line to the standby line, and correspondingly switches the main line to the standby line at the other end.
It should be noted that. If the optical signal of the next stage is being transmitted on the spare line before switching, the optical signal of the next stage after switching is interrupted.
In order to distinguish the first type of optical line automatic switching protector from the second type of optical line automatic switching protector, the specific functional differences between the two protection modes can be shown in detail in the following table, as shown in table 1.
TABLE 1
In addition, the optical line automatic switching protector 12 can be divided into a plurality of types according to a rack structure, wherein the rack structure can be divided into three typical structures of 1U, 2U and 5U, wherein a 1U machine frame is only adapted to a conventional switching disk, and if a 0dB single disk is involved, a 2U machine frame or a 5U machine frame needs to be selected and adapted. The olt 12 may be further divided into various types according to an auxiliary single disc, which includes both types of oldpifa and RFA.
Specifically, in order to directly view the state of the optical line, the optical line can be visually displayed through the switching panel, taking the second type of optical line automatic switching protector as an example, fig. 4 shows a schematic diagram of a switching panel of an optional second type of optical line automatic switching protector, where the panel includes: six ports and a plurality of indicator lights and operating buttons. Table 2 shows definition and description information of each port, table 3 shows definition and description information of a state of each indicator light, and table 4 shows definition and description information of each key, as shown in tables 2, 3, and 4.
TABLE 2
| Name(s) | Connector form | Description of the invention |
| TX | LC/UPC | Equipment optical output port |
| T1 | LC/UPC | ODF line optical transmission port |
| T2 | LC/UPC | Protected device optical output port |
| RX | LC/UPC | Equipment optical input port |
| R1 | LC/UPC | ODF line optical receiving port |
| R2 | LC/UPC | Is protectedEquipment optical input port |
TABLE 3
| Name (R) | State of state | Description of the preferred embodiment |
| AUTO | Chang Liang | Automatic switching mode |
| MANU | Chang Liang | Manual switching mode |
| ACK | Twinkling and shining | Single disc operating condition |
| Pri | Chang Liang | Primary route |
| Sec | Chang Liang | Backup routing |
TABLE 4
| Name (R) | State of state | Description of the preferred embodiment |
| Mode | Key selection | Different operating mode settings |
| Link | Key selection | Master-slave route switching |
Wherein, TX-T1, TX-T2, R1-RX and R2-RX are all route indicating lamps of the switching disc, and when the switching disc works normally, the indicating lamps of the switching disc on corresponding routes are lightened (displayed as green).
Further, after all the ports, the indicator lights and the keys on the switching layout are defined, a first operating state of the first input port or the first output port of the first optical path and a second operating state of the second input port or the second output port of the second optical path may be determined. Wherein, first operating condition and second operating condition include: a normal state and an abnormal state.
When the first optical power of the first output port of the first optical path is not lower than a preset first alarm threshold, determining that the first working state of the first optical path is a normal state; when the first optical power of the first output port of the first optical path is lower than a preset first alarm threshold, or an error code exists in internal communication, or data cannot be received, determining that the first working state of the first optical path is an abnormal state, and sending first alarm information for prompting that the first optical path has a fault;
when the second optical power of the second output port of the second optical path is not lower than a preset second alarm threshold, determining that the second working state of the second optical path is a normal state; and when the second optical power of the second output port of the second optical path is lower than a preset second alarm threshold, or an error code exists in internal communication, or data cannot be received, determining that the second working state of the second optical path is an abnormal state, and sending second alarm information for prompting that the second optical path has a fault.
Specifically, table 5 visually shows the port indicator light information of each station, as shown in table 5.
TABLE 5
In addition, the working modes of the optical line automatic switching protector 12 include: an automatic mode and a forced mode.
Wherein, the automatic mode comprises: an auto no-return mode and an auto return mode. The automatic non-return mode is that when the target optical path has a fault, the target transmitting route and the target receiving route of the target optical path are automatically switched to other optical paths from the target optical path, and after the fault of the target optical path is eliminated, optical signals are transmitted on other optical paths; the automatic return mode is that when the target optical path has a fault, the target transmitting route and the target receiving route of the target optical path are automatically switched to other optical paths from the target optical path, and after the fault of the target optical path is eliminated, the automatic return mode automatically returns to the transmission signal on the target optical path; and a forced mode for switching the route of the target optical path between the first optical path and the second optical path.
Specifically, the automatic mode may be configured to switch the first transmit route and the first receive route of the first optical path from the first optical path to the second optical path when the first optical power is lower than a preset first alarm threshold; or when the second optical power is lower than a preset first alarm threshold, switching a second transmitting route and a second receiving route of the second optical path from the second optical path to the first optical path.
Specifically, the forced mode may be configured to switch the target transmission route and the target reception route of the target optical path from the first optical path to the second optical path when the first optical power is less than the second optical power and a difference between the second optical power and the first optical power is greater than a preset turn-off threshold; or when the second optical power is smaller than the first optical power and the difference value between the first optical power and the second optical power is larger than a preset turn-off threshold value, switching the target transmitting route and the target receiving route of the target optical path from the second optical path to the first optical path.
In addition, the working modes of the optical line automatic switching protector also comprise a manual mode, and the manual mode is used for switching the local route between the main route and the standby route.
It should be noted that when the optical line automatic switching protector 12 is currently set to the automatic return Mode, the automatic return, manual and forced modes can be switched cyclically by the Mode key; when the optical line automatic switching protector 12 is currently set to the automatic non-return Mode, the Mode button can be used for circularly switching among the automatic non-return Mode, the manual Mode and the forced Mode; the network management platform 11 can switch between any mode through the remote control optical line automatic switching protector 12.
Specifically, the functions of the various optical line automatic switching protectors 12 can be visually demonstrated through table 6, as shown in table 6.
TABLE 6
In the embodiments provided in the present application, it should be understood that the disclosed technical contents may be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, units or modules, and may be electrical or in other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. An optical line automatic switching protection system, comprising: at least one optical line automatic switching protector and network management software, wherein,
the network management platform is used for monitoring data of at least one optical line automatic switching protector and controlling the optical line automatic switching protector to execute switching operation between a first optical path and a second optical path, wherein the first optical path is a current working channel of the optical line automatic switching protection system, and the second optical path is a standby working channel of the optical line automatic switching protection system;
the optical line automatic switching protector is used for executing switching operation between the first optical path and the second optical path according to a first working state of a first input port or a first output port of the first optical path and a second working state of a second input port or a second output port of the second optical path, and based on the first working state and the second working state, sending out corresponding alarm information for prompting that the first optical path or the second optical path has a fault.
2. The system of claim 1, wherein the olt protector is further configured to directly set the working mode and switching operation of the olt protector through a button of a switching panel.
3. The system of claim 1, wherein the first operating state and the second operating state each comprise: a normal state and an abnormal state, wherein,
when the first optical power of the first input port or the first output port of the first optical path is not lower than a preset first alarm threshold, determining that the first working state of the first optical path is the normal state;
when the first optical power of the first input port or the first output port of the first optical path is lower than the preset first alarm threshold, or an error code exists in internal communication, or data cannot be received, determining that the first working state of the first optical path is the abnormal state, and sending first alarm information for prompting that the first optical path has a fault;
when a second optical power of a second input port or a second output port of the second optical path is not lower than a preset second alarm threshold, determining that the second working state of the second optical path is the normal state;
and when the second optical power of the second input port or the second output port of the second optical path is lower than the preset second alarm threshold, or the internal communication has an error code, or the data cannot be received, determining that the second working state of the second optical path is the abnormal state, and sending second alarm information for prompting that the second optical path has a fault.
4. The system of claim 1, wherein the mode of operation of the optical line auto-switching protector comprises: an automatic mode and a forced mode, wherein,
the automatic mode comprises the following steps: the automatic non-return mode is that when a target optical path fails, a target transmitting route and a target receiving route of the target optical path are automatically switched to other optical paths from the target optical path, and after the failure of the target optical path is eliminated, optical signals are transmitted on the other optical paths; the automatic return mode is that when the target optical path has a fault, the target transmitting route and the target receiving route of the target optical path are automatically switched to other optical paths from the target optical path, and after the fault of the target optical path is eliminated, signals are automatically returned to be transmitted on the target optical path;
the forced mode is configured to switch a route of a target optical path between the first optical path and the second optical path.
5. The system according to claim 4, wherein the automatic mode is configured to switch the first transmit route and the first receive route of the first optical path from the first optical path to the second optical path when the first optical power is lower than the preset first alarm threshold; or, when the second optical power is lower than the preset first alarm threshold, switching a second transmitting route and a second receiving route of the second optical path from the second optical path to the first optical path.
6. The system of claim 4, wherein the forced mode is configured to switch the target transmitting route and the target receiving route of the target optical path from the first optical path to the second optical path when the first optical power is smaller than the second optical power and a difference between the second optical power and the first optical power is greater than a preset turn-off threshold; or when the second optical power is smaller than the first optical power and the difference between the first optical power and the second optical power is larger than the preset turn-off threshold, switching a target transmitting route and a target receiving route of the target optical path from the second optical path to the first optical path.
7. The system of claim 1, wherein the OLT is divided into: the optical line switching protector comprises a first type of optical line automatic switching protector and a second type of optical line automatic switching protector, wherein the first type of optical line automatic switching protector adopts a 1+1 protection mode, and the second type of optical line automatic switching protector adopts a 1.
8. The system of claim 7, wherein the first type of optical line automatic switching protector comprises: a first site and a second site, wherein a first coupler of two-way output end and a first optical switch of two-way switching are arranged on the side of the first site, a second coupler of two-way output end and a second optical switch of two-way switching are arranged on the side of the second site, wherein,
an optical signal sequentially passes through the first output end of the first coupler and the second optical switch from the first station to reach the second station, and the optical signal sequentially passes through the first output end of the second coupler and the first optical switch from the second station to reach the first station, so that a first loop is formed;
the optical signal sequentially passes through the second output end of the first coupler and the switched second optical switch from the first station to reach the second station, and the optical signal sequentially passes through the second output end of the second coupler and the first optical switch from the second station to reach the first station, so that a second loop is formed.
9. The system of claim 8, wherein the first coupler and the second coupler are 50:50 of the coupler.
10. The system according to claim 7, wherein the second type of optical line automatic switching protector comprises: a first station and a second station, a first optical switch and a third optical switch which are switched in two ways are arranged on the side of the first station, and a second optical switch and a fourth optical switch which are switched in two ways are arranged on the side of the second station, wherein,
an optical signal sequentially passes through the first output end of the third optical switch and the first output end of the fourth optical switch from the first station to reach the second station, and the optical signal sequentially passes through the first output end of the second optical switch and the first output end of the first optical switch from the second station to reach the first station, so that the first loop is formed;
the optical signal sequentially passes through the second output end of the first optical switch and the second output end of the second optical switch from the first station to reach the second station, and the optical signal sequentially passes through the second output end of the second optical switch and the second output end of the first optical switch from the second station to reach the first station, so that the second loop is formed.
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| CN (1) | CN115913344A (en) |
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2022
- 2022-12-07 CN CN202211566932.3A patent/CN115913344A/en active Pending
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