JPH03266534A - Line changeover device - Google Patents
Line changeover deviceInfo
- Publication number
- JPH03266534A JPH03266534A JP6645990A JP6645990A JPH03266534A JP H03266534 A JPH03266534 A JP H03266534A JP 6645990 A JP6645990 A JP 6645990A JP 6645990 A JP6645990 A JP 6645990A JP H03266534 A JPH03266534 A JP H03266534A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- switching
- circuit
- line
- switching control
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 abstract description 15
- 238000010586 diagram Methods 0.000 description 4
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は回線切替装置に関し、特に切替制御信号に応じ
て送信信号を現用回線から予備回線へ送出すると共に、
切替応答信号を生成し送出する回線切替装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line switching device, and particularly to a line switching device that sends a transmission signal from a working line to a protection line in response to a switching control signal, and
The present invention relates to a line switching device that generates and sends a switching response signal.
第２図は従来の回線切替装置の一例を示すブロック図で
あり、回線が現用回線１，２および予備回線３である場
合を示している。回線切替装置１００は、切替回路１０
を有し、通常、送信信号Ｓ、、ｓ２は回線切替装置１０
０を介して現用回線１，２へそれぞれ送出されている。FIG. 2 is a block diagram showing an example of a conventional line switching device, and shows a case where the lines are working lines 1 and 2 and a protection line 3. The line switching device 100 includes a switching circuit 10
Normally, the transmission signals S, s2 are sent to the line switching device 10.
0 to working lines 1 and 2, respectively.
切替制御装置２００から切替制御信号Ｃ１またはＣ２を
受けると、切替回路１０は切替制御信号Ｃ１またはＣ２
に応じて作動し、現用回線１または２と予備回線３とを
接続し、送信信号Ｓ１またはＳ２を予備回線３へ送出す
る。また、回線切替装置１００は、切替応答信号Ｒ□、
Ｒ２として、切替制御信号Ｃ１，Ｃ２をそのまま折り返
して切替制御装置２００へ送出している。Upon receiving the switching control signal C1 or C2 from the switching control device 200, the switching circuit 10 outputs the switching control signal C1 or C2.
, connects the working line 1 or 2 and the protection line 3, and sends the transmission signal S1 or S2 to the protection line 3. The line switching device 100 also receives switching response signals R□,
As R2, the switching control signals C1 and C2 are returned as they are and sent to the switching control device 200.
上述した従来の回線切替装置では、切替制御信号を受け
るとそのまま切替応答信号として折り返し送出している
ので、切替回路が正常に動作しなかった場合、あるいは
、機器故障等で送信信号が正常に回線切替装置に送出さ
れなかった場合等においても切替応答信号が送出される
という不都合が生じ、従って、切替制御システムの信頼
度を確保することができないという欠点がある。In the conventional line switching device described above, when it receives a switching control signal, it sends it back as a switching response signal, so if the switching circuit does not operate normally or due to equipment failure, the transmitted signal does not connect normally to the line. There is an inconvenience that a switching response signal is sent even when the signal is not sent to the switching device, and therefore, there is a disadvantage that the reliability of the switching control system cannot be ensured.
本発明の目的は、切替制御信号に応じて正常に予備回線
に送信信号が送出されたことを確認して切替応答信号を
送出することによって、切替制御システムの信頼度を確
保できる回線切替装置を提供することにある。An object of the present invention is to provide a line switching device that can ensure the reliability of a switching control system by confirming that a transmission signal is normally sent to a protection line in response to a switching control signal and then sending out a switching response signal. It is about providing.
本発明の回線切替装置は、切替制御信号に応じて現用回
線と予備回線とを接続する切替回路と、前記予備回線に
送出される信号を検知して検知信号を出力する信号検知
回路と、前記切替制御信号および前記検知信号を共に受
けたときに切替応答信号を出力する応答回路とを備えて
いる。また応答回路は論理積回路で構成してもよい。The line switching device of the present invention includes: a switching circuit that connects a working line and a protection line in accordance with a switching control signal; a signal detection circuit that detects a signal sent to the protection line and outputs a detection signal; and a response circuit that outputs a switching response signal when receiving both the switching control signal and the detection signal. Further, the response circuit may be constructed of an AND circuit.
次に図面を参照して本発明を説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すブロック図であり、回
線が現用回線１，２および予備回線３である場合を示し
ている。回線切替装置１００は、切替回路１０、論理積
回路１１，１２、および信号検知回路２０を有している
。FIG. 1 is a block diagram showing an embodiment of the present invention, and shows a case where the lines are working lines 1 and 2 and a protection line 3. In FIG. The line switching device 100 includes a switching circuit 10, AND circuits 11 and 12, and a signal detection circuit 20.
通常、送信信号Ｓ１．Ｓ２は、回線切替装置１００を介
して現用回線１，２へそれぞれ送出されている。切替回
路１０は、切替制御装置２００が送出する切替制御信号
Ｃ１またはＣ２に応じて作動し、現用回線１または２と
予備回線３とを接続して送信信号Ｓ１．Ｓ２を予備回線
３へ送出する。Usually, the transmitted signal S1. S2 is sent to the working lines 1 and 2 via the line switching device 100, respectively. The switching circuit 10 operates in response to the switching control signal C1 or C2 sent by the switching control device 200, connects the working line 1 or 2 and the protection line 3, and transmits the transmission signal S1. S2 is sent to the protection line 3.
ここで、送信信号Ｓ２を予備回線３へ送出する場合の回
線切替装置１００の動作について説明する。まず、切替
制御装置２００は、切替制御信号Ｃ２を回線切替装置１
００へ送出する。切替制御信号Ｃ２は、切替回路１０お
よび論理積回路１２へ同時に印加される。切替回路１０
は、切替制御信号Ｃ２を受ると現用回線２と予備回線３
とを接続して送信信号Ｓ２を予備回線３へ送出する。信
号検知回路２０は、予備回線３へ送出される送信信号を
検知して検知信号Ｋを出力する回路であり、この場合は
、予備回線３に送出される送信信号Ｓ２を検知すると検
知信号Ｋを出力する。論理積回路１１．１２は、切替制
御信号Ｃ工、Ｃ２および検知信号にの両信号を共にそれ
ぞれ受けたときに切替応答信号Ｒ□、Ｒ２をそれぞれ出
力する回路であり、この場合は、論理積回路１２が切替
制御信号Ｃ２および検知信号にの両信号を共に受けて切
替応答信号Ｒ２を切替制御装置２００へ送出する。Here, the operation of the line switching device 100 when sending the transmission signal S2 to the protection line 3 will be explained. First, the switching control device 200 transmits the switching control signal C2 to the line switching device 1.
Send to 00. The switching control signal C2 is applied to the switching circuit 10 and the AND circuit 12 simultaneously. Switching circuit 10
receives the switching control signal C2 and switches the working line 2 and protection line 3.
and transmits the transmission signal S2 to the protection line 3. The signal detection circuit 20 is a circuit that detects the transmission signal sent to the protection line 3 and outputs the detection signal K. In this case, when it detects the transmission signal S2 sent to the protection line 3, it outputs the detection signal K. Output. The AND circuits 11 and 12 are circuits that output switching response signals R□ and R2, respectively, when receiving both the switching control signals C and C2 and the detection signal, respectively. The circuit 12 receives both the switching control signal C2 and the detection signal and sends a switching response signal R2 to the switching control device 200.
以上説明したように本発明によれば、予備回線に送出さ
れる送信信号を検知して検知信号を出力する信号検知回
路、および、この検知信号と切替制御信号とが共に印加
されたときに切替応答信号を出力する論理積回路を設け
ることによって、切替回路が正常に動作して送信信号が
正常に予備回線に送出された場合のみ切替応答信号が送
出されるようにすることができるので、信頼度の高い切
替制御システムとすることができる。As explained above, according to the present invention, there is provided a signal detection circuit that detects a transmission signal sent to a protection line and outputs a detection signal, and a signal detection circuit that detects a transmission signal sent to a protection line and outputs a detection signal, and switches when both this detection signal and a switching control signal are applied. By providing an AND circuit that outputs a response signal, it is possible to ensure that the switching response signal is sent only when the switching circuit operates normally and the transmission signal is normally sent to the protection line. It is possible to create a highly efficient switching control system.
第１図は本発明の一実施例を示すブロック図、第２図は
従来の回線切替装置の一例を示すブロック図である。
１．２・・・現用回線、３・・・予備回線、１０・・・
切替回路、１１．１２・・・論理積回路、２０・・・信
号検知回路、１００・・・回線切替装置、２００・・・
切替制御装置、Ｃ，、Ｃ２・・・切替制御信号、Ｒ，、
Ｒ２・・・切替応答信号、Ｓ、、Ｓ２・・・送信信号、
Ｋ・・・検知信号。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a conventional line switching device. 1.2... Working line, 3... Protection line, 10...
Switching circuit, 11.12... AND circuit, 20... Signal detection circuit, 100... Line switching device, 200...
Switching control device, C,, C2...Switching control signal, R,...
R2...Switching response signal, S2...Transmission signal,
K...Detection signal.
Claims (1)
する切替回路と、前記予備回線に送出される信号を検知
して検知信号を出力する信号検知回路と、前記切替制御
信号および前記検知信号を共に受けたときに切替応答信
号を出力する応答回路とを備えることを特徴とする回線
切替装置。 ２、前記応答回路が論理積回路で構成されることを特徴
とする請求項１記載の回線切替装置。[Scope of Claims] 1. A switching circuit that connects a working line and a protection line in response to a switching control signal; a signal detection circuit that detects a signal sent to the protection line and outputs a detection signal; A line switching device comprising: a response circuit that outputs a switching response signal when receiving both a switching control signal and the detection signal. 2. The line switching device according to claim 1, wherein the response circuit is constituted by an AND circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6645990A JPH03266534A (en) | 1990-03-15 | 1990-03-15 | Line changeover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6645990A JPH03266534A (en) | 1990-03-15 | 1990-03-15 | Line changeover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03266534A true JPH03266534A (en) | 1991-11-27 |
Family
ID=13316376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6645990A Pending JPH03266534A (en) | 1990-03-15 | 1990-03-15 | Line changeover device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03266534A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58164334A (en) * | 1982-03-24 | 1983-09-29 | Fujitsu Ltd | Double circuit controlling system |
| JPS62235833A (en) * | 1986-04-07 | 1987-10-16 | Fuji Facom Corp | Standby system self-diagnosis system in duplicated transmitter |
-
1990
- 1990-03-15 JP JP6645990A patent/JPH03266534A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58164334A (en) * | 1982-03-24 | 1983-09-29 | Fujitsu Ltd | Double circuit controlling system |
| JPS62235833A (en) * | 1986-04-07 | 1987-10-16 | Fuji Facom Corp | Standby system self-diagnosis system in duplicated transmitter |
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