JPH01198122A - System for switching living circuit to standby circuit - Google Patents
System for switching living circuit to standby circuitInfo
- Publication number
- JPH01198122A JPH01198122A JP63022272A JP2227288A JPH01198122A JP H01198122 A JPH01198122 A JP H01198122A JP 63022272 A JP63022272 A JP 63022272A JP 2227288 A JP2227288 A JP 2227288A JP H01198122 A JPH01198122 A JP H01198122A
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- Prior art keywords
- standby
- optical transmission
- line
- optical
- station
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 91
- 230000005540 biological transmission Effects 0.000 claims abstract description 65
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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Abstract
Description
【発明の詳細な説明】
〔概 要〕
多方向光伝送システムの現用予備切り替え方式集中局に
おける予備の端局装置を１個にして、各遠方局との間の
現用回線を予備回線に切り替える時の、予備回線として
は、夫々の遠方局との間の予備の光伝送路と該予備の端
局装置とする現用予備切り替え方式の提供を目的とし、
集中局では、複数の遠方局との間を接続する現用の光伝
送路の端に夫々、光信号・電気信号の変換を行う現用の
端局装置を設け、又予備の光信号・電気信号の変換を行
う端局装置を設け、該予備の端局装置の光信号側は、該
複数の遠方局との間を接続する予備の光伝送路と夫々光
スイッチを介して接続し、該予備の端局装置の電気信号
側は、該夫々の現用の端局装置の電気信号側とを夫々電
気スイッチを介して接続し、各遠方局との間の現用回線
を予備回線に切り替える時の、予備回線としては、夫々
の遠方局との間の予備の光伝送路と該予備の端局装置と
するように＃キ櫻構成する。[Detailed Description of the Invention] [Summary] Working protection switching method of multi-directional optical transmission system When switching the working line with each remote station to a protection line by reducing the number of standby terminal equipment to one at a central station. The purpose of the backup line is to provide a backup optical transmission line between each remote station and a working backup switching system that uses the backup terminal equipment. At each end of the active optical transmission line that connects the The optical signal side of the terminal station equipment is connected to the backup optical transmission line connecting between the plurality of remote stations via respective optical switches, and the electrical signal side of the backup terminal equipment is connected to the backup optical transmission line connecting between the plurality of remote stations. When the electrical signal side of the currently used end station equipment is connected via an electrical switch, and the current line with each remote station is switched to a protection line, the protection line is the line between each remote station. The #kissakura is configured to have a backup optical transmission line and a backup terminal equipment.
本発明は、集中局と、方向の異なる複数の遠方局との間
を、夫々、現用の光伝送路、予備の光伝送路にて接続さ
れた多方向光伝送システムの現用予備切り替え方式の改
良に関する。The present invention is an improvement of a working standby switching method for a multidirectional optical transmission system in which a central station and a plurality of remote stations in different directions are connected by a working optical transmission line and a standby optical transmission line, respectively. Regarding.
以下従来例を図を用いて説明する。 、第３図は従来
例の多方向光伝送システムのブロック図で、この場合は
遠方局が３個ある場合を示しており、制御部と切替部と
で切替装置（図示していない）を構成する。A conventional example will be explained below using figures. , FIG. 3 is a block diagram of a conventional multi-directional optical transmission system. In this case, there are three remote stations, and a switching device (not shown) is composed of a control section and a switching section. do.
従来は、集中局１゛と、遠方局２． ３． ３’間は、
夫々現用の光伝送路４．４−Ｌ’５．５−１．５’ 、
５’ −１及び予備の光伝送路６． ７． ７゜にて接
続し、遠方局２では、現用の光伝送路４゜４−１及び予
備の光伝送路６の端には、光信号・電気信号の変換を行
う端局装置（以下端局装置と称す）８．８−１．１０を
接続し、又障害を検出した現用の端局装置例えば８−１
は、切り替え指示を制御部４７に送り、制御部４７では
、現用の複数の端局装置８．８−１より現用の光伝送路
４゜４−１のサービスチャネルーを介して予備に切り替
えるスイッチ制御信号を集中局１゛側に送り、又切替部
４６を制御し、端局装置８．現用の光伝送路４よりなる
現用回線を、端局装置１０．予備の光伝送路６よりなる
予備回線に切り替えを行う。Conventionally, there are a central station 1 and a remote station 2. 3. Between 3',
Currently used optical transmission lines 4.4-L'5.5-1.5',
5'-1 and spare optical transmission line 6. 7. 7°, and in the remote station 2, a terminal equipment (hereinafter referred to as a terminal station) is installed at the end of the active optical transmission line 4° 4-1 and the backup optical transmission line 6 for converting optical signals and electrical signals. 8.8-1.10 (referred to as "equipment"), and the current terminal equipment that has detected the fault, e.g. 8-1
sends a switching instruction to the control unit 47, and the control unit 47 sends a switch for switching to the standby from the plurality of working terminal devices 8.8-1 through the service channel of the working optical transmission line 4-4-1. The control signal is sent to the central station 1' side, and also controls the switching section 46, and the terminal station device 8. The working line consisting of the working optical transmission line 4 is connected to the terminal equipment 10. Switching is performed to a backup line consisting of a backup optical transmission line 6.
又遠方局３では、遠方局２と同じで、現用の光伝送路５
．５−１及び予備の光伝送路７の端には、端局装置９．
９−１．１１を接続し、又現用回線と予備回線の切り替
えを行う切替部４８．制御部４９を有する。Also, at remote station 3, the same as remote station 2, the currently used optical transmission line 5
．． At the ends of the optical transmission line 7 and the standby optical transmission line 7, there is a terminal device 9.5-1.
9-1.11 and also switches between the working line and the protection line. It has a control section 49.
又遠方局３゛でも、遠方局２と同じで、現用の光伝送路
５’ 、５’ −１及び予備の光伝送路７゛の端には、
端局装置４３．４４．４５を接続し、又現用回線と予備
回線の切り替えを行う切替部５０、制御部５１を有する
。Also, at the remote station 3', the same as the remote station 2, there are
It has a switching unit 50 and a control unit 51 for connecting terminal equipment 43, 44, and 45, and for switching between a working line and a protection line.
集中局１′では、遠方局２対向の現用の光伝送路４．４
−１及び予備の光伝送路６の端には、端局装置１４．１
４−１．４０が接続されており、又現用予備の切替部５
２及びこれを制御する制御部５３を有し、切替部５２の
出口には、多重分離を行う多重化部２６．２７が接続さ
れている。At the central station 1', the active optical transmission line 4.4 facing the remote station 2 is connected to the central station 1'.
-1 and the end of the spare optical transmission line 6 are equipped with terminal equipment 14.1.
4-1.40 is connected, and the working and standby switching unit 5
2 and a control section 53 for controlling the switching section 52, and multiplexing sections 26 and 27 for performing demultiplexing are connected to the output of the switching section 52.
又遠方局３対向の現用の光伝送路５．５−１及び予備の
光伝送路７の端には、端局装置１５．１５−１．４１が
接続されており、又現用予備の切替部５４及びこれを制
御する制御部５５を有し、切替部５４．０出口には、多
重分離を行う多重化部２８．２９が接続されている。Furthermore, terminal equipment 15.15-1.41 is connected to the ends of the active optical transmission line 5.5-1 and the backup optical transmission line 7 facing the remote station 3, and the switching unit for the active backup 54 and a control section 55 for controlling the switching section 54. A multiplexing section 28.29 that performs demultiplexing is connected to the output of the switching section 54.0.
又遠方局３゛対向の現用の光伝送路５ “、５′−１及
び予備の光伝送路７°の端には、端局装置１５’ 、１
５’−１，４２が接続されており、又現用予備の切替部
５６及びこれを制御する制御部５７を有し、切替部５６
の出口には、多重分離を行う多重化部３０．３１が接続
されている。In addition, terminal equipment 15', 1 is installed at the ends of the active optical transmission line 5'', 5'-1 and the backup optical transmission line 7° facing the remote station 3'.
5'-1 and 42 are connected to each other, and also has a switching section 56 for active use and a standby, and a control section 57 for controlling this, and the switching section 56
A multiplexer 30, 31 that performs demultiplexing is connected to the outlet of the .
集中局１゛でのく現用予備の切り替えは、各方向別に行
うが、遠方局２対向の場合を例にとり説明する。Switching between working and standby at the central station 1' is performed separately for each direction, and will be explained by taking as an example the case where the remote station 2 is facing the opposite side.
障害を検出した現用の端局装置例えば１４は、切り替え
指示を制御部５３に送り、制御部５３では、現用の複数
の端局装置１４．１４−１より現用の光伝送路４．４−
１のサービスチャネルを介して予備に切り替えるスイッ
チ制御信号を遠方局２側に送り、又切替部５２を制御し
、端局装置１４、現用の光伝送路４より°なる現用回線
を、端局装置４０．予備の光伝送路６よりなる予備回線
に切り替えを行う。The current terminal device, for example 14, which has detected a failure, sends a switching instruction to the control unit 53, and the control unit 53 switches the current optical transmission line 4.4- from the plurality of current terminal devices 14.14-1 to the current optical transmission line 4.4-1.
A switch control signal for switching to standby is sent to the remote station 2 side via the service channel 1, and the switching unit 52 is also controlled, and the terminal station device 14 connects the working line from the working optical transmission line 4 to the remote station 2 side. 40. Switching is performed to a backup line consisting of a backup optical transmission line 6.
尚、遠方局２側より、サービスチャネルを介して、例え
ば端局装置８．現用の光伝送路４よりなる現用回線を、
予備回線に切り替えるスイッチ制御信号を端局装置１４
．１４−１が受信すれば、この信号を制御部５３に送り
、切替部５２を制御して、現用回線を予備回線に切り替
える。Note that from the remote station 2 side, for example, the end station device 8. The working line consisting of the working optical transmission line 4 is
A switch control signal for switching to a protection line is sent to the terminal device 14.
．． 14-1 receives this signal, it sends this signal to the control unit 53, controls the switching unit 52, and switches the working line to the protection line.
しかしながら、集中局１°では、各方向別の予備の光伝
送路６． ７． ７’の端に、夫々端局装置４０．４１
．４２を有し、システムが高価になる問題点がある。However, at the centralized station 1°, backup optical transmission lines 6. 7. At the end of 7', terminal equipment 40 and 41 are installed respectively.
．． 42, which has the problem of making the system expensive.
本発明は、集中局における予備の端局装置を１個にして
、各遠方局との間の現用回線を予備回線に切り替える時
の、予備回線としては、夫々の遠方局との間の予備の光
伝送路と該予備の端局装置とする現用予備切り替え方式
の提供を目的としている。The present invention reduces the number of standby terminal equipment in a centralized station to one, and when the working line with each remote station is switched to the standby line, the standby line between each remote station is used as the standby line. The purpose of this invention is to provide a working protection switching system for optical transmission lines and the protection terminal equipment.
第１図は本発明の原理ブロック図である。 FIG. 1 is a block diagram of the principle of the present invention.
第１図に示す如く、集中局ｌと、方向の異なる複数の遠
方局２．３との間を、夫々、現用の光伝送路４，５．予
備の光伝送路６．７にて接続し、該複数の遠方局２，３
では、夫々、現用の光伝送路４，５．予備の光伝送路６
，７の端に、夫々、端局装置８，９，１０．１１を有し
、又夫々、現用回線が障害の時は予備回線に切り替える
、切替装置１２．１３を有する多方向光伝送システムに
おいて、
該集中局１では、該複数の遠方局２，３との間を接続す
る現用の光伝送路４．５の端には夫々、光用用の端局装
置１４．１５を設け、又予備の端局装置１６を設ける。As shown in FIG. 1, optical transmission lines 4, 5, . Connected via a spare optical transmission line 6.7, the plurality of remote stations 2 and 3
Now, the currently used optical transmission lines 4, 5, . Spare optical transmission line 6
. In the centralized station 1, optical terminal equipment 14, 15 is provided at each end of the active optical transmission line 4, 5 that connects the plurality of remote stations 2, 3, and a backup A terminal device 16 is provided.
そして、該予備の端局装置１６の光信号側は、該複数の
遠方局２，３との間を接続する予備の光伝送路６．７と
夫々光スイッチ１８．１９を介して接続し、該予備の端
局装置１６の電気信号側は、該夫々の現用の端局装置１
４．１５の電気信号側とを夫々電気スイッチ２０．２１
を介して接続し、各遠方局２，３との間の現用回線を予
備回線に切り替える時の、予備回線としては、夫々の遠
方局との間の予備の光伝送路と該予備の端局装置１６と
する構成とする。The optical signal side of the backup terminal device 16 is connected to a backup optical transmission line 6.7 connecting between the plurality of remote stations 2 and 3 via respective optical switches 18.19, The electrical signal side of the spare terminal equipment 16 is connected to the respective working terminal equipment 1.
4.15 electric signal side and electric switch 20.21 respectively.
When switching the working line between each remote station 2 and 3 to a protection line, the protection line includes a spare optical transmission line between each remote station and the spare terminal station. The configuration is such that the device 16 is used.
本発明によれば、例えば、端局装置１４．現用の光伝送
路４．端局装置８よりなる現用回線が障害となり、予備
回線に切り替える時は、集中局１では、光スイッチ１８
にて予備の光伝送路６を予備の端局装置１６の光信号側
に接続し、又電気スイッチ２０にて切り替え、予備の端
局装置１６の電気信号側を、多重化部側に接続し、遠方
局２側では、従来と同じく、切替装置１２にて、現用回
線を端局装置１０を含む予備回線に切り替える。According to the present invention, for example, the terminal device 14. Current optical transmission line4. When the working line consisting of the terminal equipment 8 becomes a failure and is switched to the protection line, the central station 1 switches the optical switch 18.
Connect the spare optical transmission line 6 to the optical signal side of the spare terminal equipment 16 at the switch, switch the electrical switch 20, and connect the electrical signal side of the spare terminal equipment 16 to the multiplexer side. On the far station 2 side, the switching device 12 switches the working line to the protection line including the terminal station 10, as in the conventional case.
又、端局装置１５．現用の光伝送路５．端局装置９より
なる現用回線が障害となり、予備回線に切り替える時は
、集中局１では、光スイッチ１９にて予備の光伝送路７
を予備の端局装置１６の光信号側に接続し、又電気スイ
ッチ２１にて切り替え、予備の端局装置１６の電気信号
側を、多重化部側に接続し、遠方局３側では、従来と同
じく、切替装置１３にて、現用回線を端局装置１１を含
む予備回線に切り替える。Also, the terminal equipment 15. Current optical transmission line5. When the working line consisting of the terminal equipment 9 becomes a failure and is switched to the protection line, the central office 1 switches the optical transmission line 7 to the protection line using the optical switch 19.
is connected to the optical signal side of the spare terminal equipment 16, and switched by the electric switch 21, and the electrical signal side of the spare terminal equipment 16 is connected to the multiplexing unit side. Similarly, the switching device 13 switches the working line to the protection line including the terminal device 11.
即ち、集中局ｌ側では、予備の端局装置は１個で、各遠
方局との間の現用回線を予備回線に切り替えることが出
来る。That is, on the centralized station I side, there is only one standby terminal station device, and the working line with each remote station can be switched to the standby line.
以下本発明の１実施例に付き図に従って説明する。 An embodiment of the present invention will be described below with reference to the accompanying drawings.
第２図は本発明の実施例の集中局の現用予備切替装置を
主体としたブロック図である。FIG. 2 is a block diagram mainly showing a working/standby switching device for a centralized station according to an embodiment of the present invention.
本発明の場合の多方向光伝送システムでも、遠方局側は
従来と同じであるので、第２図では遠方局が３個の場合
の集中局１側を図示しており、現用の光伝送路４．４−
１．５．５−１，５’ 。Even in the multi-directional optical transmission system of the present invention, the far station side is the same as the conventional one, so Figure 2 shows the centralized station 1 side when there are three far stations, and shows the optical transmission line in use. 4.4-
1.5.5-1,5'.
５’−Ｌ及び予備の光伝送路６，７．７’ 、現用回線
の端局装置１４．１４−１．１５．１５−１．１５’
、１５’ −１及び多重化部２６〜３１は第４図の場合
と同じである。5'-L and backup optical transmission lines 6, 7.7', working line terminal equipment 14.14-1.15.15-1.15'
, 15'-1 and multiplexing units 26 to 31 are the same as in FIG.
第２図では、切替部２５にて、現用回線の端局装置１４
．１４−１．１５．１５−１．１５°。In FIG. 2, in the switching unit 25, the terminal equipment 14 of the working line
．． 14-1.15.15-1.15°.
１５”−１の電気信号側を、（Ａ）に示す多重化部側を
共通として、現用の端局装置側と予備の端局装置側とを
切り替える構成の、電気スイッチ２０．２０−１．２１
．２１−１．２３．−２３−１にて、多重化部２６〜３
１への接続を、予備の端局装置１６の電気信号側に切り
替えられるように接続している。Electrical switch 20.20-1.15"-1 has a configuration in which the multiplexer side shown in (A) is used in common and the electric signal side of 15"-1 is switched between the working terminal equipment side and the standby terminal equipment side. 21
．． 21-1.23. -23-1, multiplexing units 26 to 3
1 can be switched to the electrical signal side of the standby terminal device 16.
又予備の光伝送路６．７．７°を、（Ｂ）に示す予備の
光伝送路側をオンオフする構成の光スイッチ１８． １
９． １９’にて、予備の端局装置１６の光信号側にオ
ンオフ出来るようにしである。In addition, an optical switch 18 is configured to turn on and off the spare optical transmission line 6.7.7° as shown in (B). 1
9. At 19', the optical signal side of the standby terminal equipment 16 can be turned on and off.
又善男用回線の端局装置例えば１４にて、障害を検出し
た時は、この情報を制御部３２に送り、制御部３２では
、表示部３３に障害を表示し、又従来と同じく、現用の
複数の端局装置１４，１４−１より現用の光伝送路４．
４−１のサービスチャネルを介して予備に切り替えるス
イッチ制御信号を遠方局２側に送る。Also, when a fault is detected in the terminal equipment of the Yoshio's line, for example, 14, this information is sent to the control section 32, and the control section 32 displays the fault on the display section 33. The current optical transmission line 4.
A switch control signal for switching to standby is sent to the remote station 2 via the service channel 4-1.
又、切替部２５を制御し予備に切り替える。Further, the switching section 25 is controlled to switch to the standby mode.
この切り替えは、光スイッチ１８にて、予備の光伝送路
６を予備の端局装置１６の光信号側に接続し、又電気ス
イッチ２０にて、多重化部２６と端局装置１４との接続
を切り離し、多重化部２６を予備の端局装置１６の電気
信号側に接続する。This switching is performed by connecting the backup optical transmission line 6 to the optical signal side of the backup terminal device 16 using the optical switch 18, and by connecting the multiplexing unit 26 and the terminal device 14 by using the electrical switch 20. The multiplexing section 26 is connected to the electrical signal side of the standby terminal device 16.
切り替えが完了すれば、表示部３３にての障害の表示を
消す。When the switching is completed, the display of the failure on the display unit 33 is turned off.
勿論、遠方局２では、従来と同じく、障害になった現用
回線を予備回線に切り替える。Of course, the remote station 2 switches the faulty working line to the protection line, as in the past.
又遠方局２側より、現用回線を予備回線に切り替えるス
イッチ制御信号をサービスチャネルを介して、例えば、
端局装置１４．１４−１が受信すると、このスイッチ制
御信号を制御部３２に送り、制御部３２では、障害回線
を表示部３３に表示し、切替部２５を、上記説明の如く
制御して切り替えを行う。Further, from the remote station 2 side, a switch control signal for switching the working line to the protection line is sent via the service channel, for example,
When received by the terminal device 14.14-1, this switch control signal is sent to the control section 32, and the control section 32 displays the faulty line on the display section 33 and controls the switching section 25 as described above. Make the switch.
切り替えが完了すれば、表示部３３の表示を消す。When the switching is completed, the display on the display section 33 is turned off.
又他の方向の、例えば、端局装置１５を含む現用回線が
障害になれば、切り替え動作を行う光スイッチを１９と
し、゛電気スイッチを２１とする以外は上記ど同様の動
作′を行い、予備の光伝送路７゜予備の端局装置１６を
使用する予備回線に切り替える。If the working line in the other direction, for example, including the terminal equipment 15, becomes impaired, the optical switch that performs the switching operation is set to 19, and the same operation as above is performed except that the electrical switch is set to 21. The backup optical transmission line 7° is switched to a backup line using the backup terminal equipment 16.
従って、予備の端局装置は１個で、各方向の現用回線を
予備回線に切り替えることが出来る。Therefore, with only one standby terminal device, the working line in each direction can be switched to the standby line.
以上詳細に説明せる如く本発明によれば、現用回線が障
害になった時、集中局では、予備の端局装置は１個で、
各方向の現用回線を予備回線に切り替えることが出来る
ので、多方向光伝送システムを安価に構成することが出
来る効果がある。As explained in detail above, according to the present invention, when the working line becomes impaired, there is only one standby end station device at the central station,
Since the working line in each direction can be switched to a protection line, there is an effect that a multidirectional optical transmission system can be constructed at low cost.
第１図は本発明の原理ブロック図、
第２図は本発明の実施例の集中局の現用予備切替装置を
主体としたプロ・７り図、
第３図は従来例の多方向光伝送システムのブロック図で
ある。
図に・おいて、
１．１゛は集中局、
２．３．３°は遠方局、
４．４−１．５．５−１．５’ 、５’ −イは現用の
光伝送路、
６．７．７’ は予備の光伝送路、
８．８−１．９．９−１．１０，１１，１４．１４−１
．１５．１５−１．１５°、１５’ −１゜４０〜４５
は端局装置、
１２．１３は切替装置、
１６は予備の端局装置、
１８．１９．１９° は光スイッチ、
２０．２０−１．２１．２１−１．２３．２３−１は電
気スイッチ、
２６〜３１は多重化部、
３２．４７，４９．５１．５３．５５．５７は制御部、
４６．４８，５０，５２，５４．５６は切替部、３３は
表示部を示す。
４（冬Ｂ月の＃理アロ・７）凶
牛 １ 図Fig. 1 is a principle block diagram of the present invention, Fig. 2 is a professional seven-dimensional diagram mainly based on the working standby switching device of a central station according to an embodiment of the present invention, and Fig. 3 is a conventional multi-directional optical transmission system. FIG. In the figure, 1.1' is the central station, 2.3.3 is the remote station, 4.4-1.5.5-1.5', 5'-a is the current optical transmission line, 6.7.7' is a backup optical transmission line, 8.8-1.9.9-1.10, 11, 14.14-1
．． 15.15-1.15°, 15'-1°40~45
12.13 is a switching device, 16 is a spare terminal device, 18.19.19° is an optical switch, 20.20-1.21.21-1.23.23-1 is an electrical switch , 26 to 31 are multiplexing sections, 32.47, 49.51.53.55.57 are control sections, 46.48, 50, 52, 54.56 are switching sections, and 33 is a display section. 4 (Winter B Month's #Riaro・7) Bad Ox 1 Diagram
Claims (1)
との間を、夫々、現用の光伝送路（４、５）、予備の光
伝送路（６、７）にて接続し、該複数の遠方局（２、３
）では、夫々、現用の光伝送路（４、５）、予備の光伝
送路（６、７）の端に、夫々、光信号・電気信号の変換
を行う端局装置（８、９、１０、１１）を有し、又夫々
、現用回線が障害の時は予備回線に切り替える、切替装
置（１２、１３）を有する多方向光伝送システムにおい
て、 該集中局（１）では、該複数の遠方局（２、３）との間
を接続する現用の光伝送路（４、５）の端に夫々、光信
号・電気信号の変換を行う現用の端局装置（１４、１５
）を設け、又予備の光信号・電気信号の変換を行う端局
装置（１６）を設け、該予備の端局装置（１６）の光信
号側は、該複数の遠方局（２、３）との間を接続する予
備の光伝送路（６、７）と夫々光スイッチ（１８、１９
）を介して接続し、該予備の端局装置（１６）の電気信
号側は、該夫々の現用の端局装置（１４、１５）の電気
信号側とを夫々電気スイッチ（２０、２１）を介して接
続し、各遠方局（２、３）との間の現用回線を予備回線
に切り替える時の、予備回線としては、夫々の遠方局と
の間の予備の光伝送路と該予備の端局装置（１６）とす
るようにしたことを特徴とする現用予備切り替え方式。[Claims] A centralized station (1) and a plurality of remote stations (2, 3) in different directions
are connected to the remote stations (2, 3) using active optical transmission lines (4, 5) and backup optical transmission lines (6, 7), respectively.
), terminal equipment (8, 9, 10) that converts optical signals and electrical signals is installed at the ends of the active optical transmission lines (4, 5) and the backup optical transmission lines (6, 7), respectively. . Currently used terminal equipment (14, 15) that converts optical signals and electrical signals is installed at the ends of the currently used optical transmission lines (4, 5) connecting between the stations (2, 3).
), and a terminal device (16) for converting a backup optical signal/electrical signal is provided, and the optical signal side of the backup terminal device (16) is connected to the plurality of remote stations (2, 3). Spare optical transmission lines (6, 7) and optical switches (18, 19) connecting between
), and the electrical signal side of the standby terminal equipment (16) is connected to the electrical signal side of the respective working terminal equipment (14, 15) through electrical switches (20, 21), respectively. When switching the working line between each remote station (2, 3) to a protection line, the protection line includes a spare optical transmission line between each remote station and the spare end. A working/standby switching system characterized in that a station device (16) is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63022272A JPH01198122A (en) | 1988-02-02 | 1988-02-02 | System for switching living circuit to standby circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63022272A JPH01198122A (en) | 1988-02-02 | 1988-02-02 | System for switching living circuit to standby circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01198122A true JPH01198122A (en) | 1989-08-09 |
Family
ID=12078127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63022272A Pending JPH01198122A (en) | 1988-02-02 | 1988-02-02 | System for switching living circuit to standby circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01198122A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143031A (en) * | 1983-12-29 | 1985-07-29 | Fujitsu Ltd | Digital signal transmitter |
-
1988
- 1988-02-02 JP JP63022272A patent/JPH01198122A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143031A (en) * | 1983-12-29 | 1985-07-29 | Fujitsu Ltd | Digital signal transmitter |
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