JPS62262521A - Monitoring system - Google Patents
Monitoring systemInfo
- Publication number
- JPS62262521A JPS62262521A JP61104896A JP10489686A JPS62262521A JP S62262521 A JPS62262521 A JP S62262521A JP 61104896 A JP61104896 A JP 61104896A JP 10489686 A JP10489686 A JP 10489686A JP S62262521 A JPS62262521 A JP S62262521A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- changeover switch
- standby
- protection
- working
- 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.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 title abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、２重化された通信網において現用側受信回路
の異常を予備側受信回路を利用して検出を行なうモニタ
リングシステムに関し、特に現用側信号と予備側信号と
の切替方式に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a monitoring system that uses a protection receiving circuit to detect an abnormality in a working side receiving circuit in a duplex communication network, and particularly relates to a monitoring system that uses a protection side receiving circuit to detect an abnormality in a working side receiving circuit in a duplex communication network. This relates to a switching method between a side signal and a standby side signal.
従来のモニタリングシステムを第２図に示す。 A conventional monitoring system is shown in Figure 2.
第２図において、■は現用側同期回路、２は予備側同期
回路、３は切替スイッチ、４は現用側多重分離回路、５
は予備側多重分離回路、６は比較回路である。In Fig. 2, ■ is a working side synchronous circuit, 2 is a protection side synchronous circuit, 3 is a changeover switch, 4 is a working side demultiplexing circuit, and 5 is a switching circuit on a working side.
6 is a spare side demultiplexing circuit, and 6 is a comparison circuit.
従来のモニタリングシステムにおいては、予備側同期回
路２の前に置かれた切替スイッチ３で、切替スイッチ３
の点線で示すように、予備側の受信回路（予備側同期回
路２と予備側多重分離回路５を有する）の人力を現用側
伝送路に切り替えることによって、モニタリングを行な
っていた。In the conventional monitoring system, the changeover switch 3 is placed in front of the standby side synchronization circuit 2.
As shown by the dotted line, monitoring was performed by switching the human power of the protection receiving circuit (comprising the protection synchronization circuit 2 and the protection demultiplexing circuit 5) to the working transmission line.
従来のモニタリングシステムでは、モニタリングを行な
うか行なわないかで予備側同期回路２の人力を切り替え
るので、そのたびに予備側同期回路２で同期はずれが起
こるため、再び同期を取り直す必要があった。また、モ
ニタリングを行なっている最中では、予備側伝送路の信
号は予備側の受信回路に入力されないため、モニタリン
グ時には予備側伝送路の監視ができないなどの問題があ
った。In conventional monitoring systems, the manual power of the standby side synchronous circuit 2 is switched depending on whether monitoring is to be performed or not, and each time the standby side synchronous circuit 2 loses synchronization, it is necessary to resynchronize it. Further, while monitoring is in progress, the signal on the protection side transmission line is not input to the protection side receiving circuit, so there is a problem in that the protection side transmission line cannot be monitored during monitoring.
このような問題点を解決するために本発明は、現用側伝
送路の信号のフレーム同期を確立し誤り検出を行なう現
用側同期回路と、この現用側同期回路からの信号を分離
する現用側多重分離回路と、予備側伝送路の信号のフレ
ーム同期を確立し誤り検出を行なう予備側同期回路と、
現用側同期回路からの信号と予備側同期回路からの信号
とを切り替える切替スイッチと、この切替スイッチから
の信号を分離する予備側多重分離回路と、現用側多重分
離回路の出力信号と予備側多重分離回路の出力信号とを
比較する比較回路とをシステムに設けるようにしたもの
である。In order to solve these problems, the present invention provides a working side synchronization circuit that establishes frame synchronization of signals on the working side transmission line and performs error detection, and a working side multiplexing circuit that separates the signals from this working side synchronization circuit. a separation circuit, a protection side synchronization circuit that establishes frame synchronization of signals on the protection side transmission line and performs error detection;
A changeover switch that switches the signal from the working side synchronous circuit and a signal from the protection side synchronous circuit, a protection side demultiplexing circuit that separates the signal from this changeover switch, and an output signal of the working side demultiplexing circuit and the protection side multiplexer. The system is provided with a comparison circuit that compares the output signal of the separation circuit.
〔作用〕
本発明においては、モニタリングを行なう状態と行なわ
ない状態との切替えの時、予備側同期回路の同期はずれ
が無くなり、モニタリング中でも予備側伝送路の監視を
行なうことができる。[Function] In the present invention, when switching between a monitoring state and a non-monitoring state, there is no loss of synchronization of the standby side synchronous circuit, and the standby side transmission line can be monitored even during monitoring.
本発明に係わるモニタリングシステムの一実施例を第１
図に示す。第１図において第２図と同一部分又は相当部
分には同一符号が付しである。A first embodiment of a monitoring system according to the present invention will be described below.
As shown in the figure. In FIG. 1, the same or equivalent parts as in FIG. 2 are given the same reference numerals.
第１図１８）はモニタリングを行なっていない場合を示
す系統図であり、この時切替スイッチ３は、予備側同期
回路２と予備側多重分離回路５とを接続している。第１
図（ｂ）はモニタリングを行なっている場合を示す系統
図であり、この時切替スイ・ノチ３は、現用側同期回路
１と予備側多重分離回路５とを接続している。第１図１
８）、 ｌｂ）のいずれの場合でも、予備側同期回路２
には予備側伝送路の信号が入力されており、切替スイッ
チ３の切替えによる同期はずれは起こらない、また、切
替スイッチ３がどちらの側に倒れていても、予備側伝送
路の監視を行なうことができる。FIG. 18) is a system diagram showing a case where monitoring is not performed, and at this time the changeover switch 3 connects the standby side synchronization circuit 2 and the standby side multiplexing/demultiplexing circuit 5. 1st
Figure (b) is a system diagram showing a case where monitoring is performed, and at this time the switching switch 3 connects the working side synchronous circuit 1 and the standby side multiplexing/demultiplexing circuit 5. Figure 1 1
8), lb), the standby side synchronous circuit 2
The signal from the protection side transmission line is input to the unit, so that synchronization will not occur due to switching of the changeover switch 3, and the protection side transmission line will be monitored regardless of which side the changeover switch 3 is turned to. Can be done.
以上説明したように本発明は、現用側同期回路の出力信
号と予備側同期回路の出力信号とを切り替える切替スイ
ッチを設けることにより、予備側同期回路への入力信号
が切り替えられることがなくなるので、予備側同期回路
の同期はずれが起こることはなく、また、予備側伝送路
の監視が常に行なえる効果がある。As explained above, in the present invention, by providing a changeover switch that switches between the output signal of the working side synchronous circuit and the output signal of the standby side synchronous circuit, the input signal to the standby side synchronous circuit is not switched. There is no possibility that the standby side synchronization circuit will be out of synchronization, and the standby side transmission line can be constantly monitored.
第１図は本発明に係わるモニタリングシステムの一実施
例を示す系統図、第２図は従来のモニタリングシステム
を示す系統図である。
１・・・現用側同期回路、２・・・予備側同期回路、３
・・・切替スイッチ、４・・・現用側条重分＾「回路、
５・・・予備側多重分離回路、６・・・比較回路。FIG. 1 is a system diagram showing an embodiment of a monitoring system according to the present invention, and FIG. 2 is a system diagram showing a conventional monitoring system. 1... Working side synchronous circuit, 2... Standby side synchronous circuit, 3
... Selector switch, 4... Working side row weight ^ "Circuit,
5... Reserve side demultiplexing circuit, 6... Comparison circuit.
Claims (1)
行なう現用側同期回路と、この現用側同期回路からの信
号を分離する現用側多重分離回路と、予備側伝送路の信
号のフレーム同期を確立し誤り検出を行なう予備側同期
回路と、前記現用側同期回路からの信号と前記予備側同
期回路からの信号とを切り替える切替スイッチと、この
切替スイッチからの信号を分離する予備側多重分離回路
と、前記現用側多重分離回路の出力信号と前記予備側多
重分離回路の出力信号とを比較する比較回路とを備えた
ことを特徴とするモニタリングシステムA working side synchronization circuit establishes frame synchronization of the signals on the working side transmission line and performs error detection, a working side demultiplexing circuit separates the signals from this working side synchronization circuit, and a working side demultiplexing circuit establishes frame synchronization of the signals on the protection side transmission line. A protection side synchronous circuit that establishes and performs error detection, a changeover switch that switches between the signal from the working side synchronous circuit and the signal from the protection side synchronous circuit, and a protection side demultiplexer circuit that separates the signal from the changeover switch. and a comparison circuit that compares the output signal of the working-side demultiplexing circuit and the output signal of the protection-side demultiplexing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61104896A JPS62262521A (en) | 1986-05-09 | 1986-05-09 | Monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61104896A JPS62262521A (en) | 1986-05-09 | 1986-05-09 | Monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62262521A true JPS62262521A (en) | 1987-11-14 |
| JPH0439931B2 JPH0439931B2 (en) | 1992-07-01 |
Family
ID=14392914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61104896A Granted JPS62262521A (en) | 1986-05-09 | 1986-05-09 | Monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62262521A (en) |
-
1986
- 1986-05-09 JP JP61104896A patent/JPS62262521A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0439931B2 (en) | 1992-07-01 |
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