JPS6053332A - Transmission line switching system - Google Patents
Transmission line switching systemInfo
- Publication number
- JPS6053332A JPS6053332A JP16156483A JP16156483A JPS6053332A JP S6053332 A JPS6053332 A JP S6053332A JP 16156483 A JP16156483 A JP 16156483A JP 16156483 A JP16156483 A JP 16156483A JP S6053332 A JPS6053332 A JP S6053332A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- switching
- synchronism
- circuit
- exchange system
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、交換局と、この交換局に制御のされる二重化
した集線多重化」ムイ斤との間の伝送路切替方式に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission line switching system between a switching center and a duplex concentrating multiplexing system controlled by the switching center.
従来、第１図に示すように、交換局１と、該交換局１よ
沙現用／予備を制御される遠隔に設置された集線多重化
装置３とが、二重化された伝送路２にて接続されている
場合に、交換局１と集線多重化装置３との間において、
高次群での伝送路２の障害が発生すると、前記交換局ｌ
及び集線多重化装置３に影響全及ぼし、伝送路障害にも
かかわらず交換系装置の切替ローテーションに入り、通
信に影響を及ばすという欠点があった。Conventionally, as shown in FIG. 1, a switching center 1 and a remotely installed concentrator/multiplexer 3 that controls the active/backup functions of the switching center 1 are connected via a duplex transmission line 2. between the exchange 1 and the concentrator multiplexer 3,
When a failure occurs in the transmission line 2 in the higher order group, the switching center l
This has the disadvantage that it has a full effect on the line concentrator and multiplexer 3, and even though there is a transmission line failure, switching system equipment enters switching rotation, affecting communication.
即ち、従来の二重化された交換局及び遠隔の集線多重化
装置の間での高次群の伝送路の同期はずれは、低次群に
報告されるのみであり、これによって交換系装置は、あ
るタイミングによって、二重化された系の切替を行なっ
ていた。そのため、本来の交換系装置の障害でないにも
拘わらず、交換系装置の切替えが行なわれていた。In other words, in the conventional duplex switching center and remote concentrating multiplexing equipment, the loss of synchronization of the high-order group transmission path is only reported to the lower-order group, and as a result, the switching system equipment can , the redundant system was being switched. For this reason, switching of switching system equipment was performed even though there was no failure in the original switching system equipment.
この従来方式では、遠隔の集線多重化装置がＩＰＬの必
要なコールド予備の場合、常にＩＰＬ及び初期設定、呼
設定の必要性があり、ユーザに対しての影響が大となる
欠点があった。This conventional method has the disadvantage that when a remote concentrator multiplexer is a cold standby that requires IPL, it is always necessary to perform IPL, initial settings, and call settings, which has a large impact on users.
本発明は、上記欠点を除くべく、伝送路の同期外れを検
出し、伝送路の同期はずれが発生した時には、交換系装
置が切替わる以前に伝送路を切替え、交換系装置に影響
を及はすことを防ぐようにした装置を提供することを目
的とする。In order to eliminate the above-mentioned drawbacks, the present invention detects out-of-synchronization of the transmission line, and when the out-of-synchronization of the transmission line occurs, switches the transmission line before the switching equipment is switched, so that the switching equipment is not affected. The purpose of the present invention is to provide a device that prevents this from occurring.
上記目的を達成すべく本発明は、交換局と、該交換局よ
り現用／予備を制御される遠隔に設置された実線多重化
装置とを接続する二重化された伝送路の切替方式におい
て、上記交換局と集線多重化装置とに、上記伝送路の同
期信号発生回路、同期外れ検出回路及び該検出回路の指
示により上記二重化伝送路の現用／予備の切替を行なう
切替回路とを備えたことを特徴とする。In order to achieve the above object, the present invention provides a method for switching a duplex transmission line that connects a switching center and a remotely installed solid line multiplexing device whose working/backup is controlled by the switching center. The station and the line concentrator/multiplexer are equipped with a synchronization signal generation circuit for the transmission line, an out-of-sync detection circuit, and a switching circuit that switches the duplex transmission line between working and standby according to instructions from the detection circuit. shall be.
以下、本発明を図面に示す実施例に基づいて説明する。Hereinafter, the present invention will be explained based on embodiments shown in the drawings.
第２図は本発明伝送路切替方式の一実施例を示すブロッ
クである。FIG. 2 is a block diagram showing an embodiment of the transmission line switching system of the present invention.
同図において本発明伝送路切替方式は、各々二重化さｆ
した交換局１．伝送路２及び集線多重化装置３から成る
システムに適用されて成り、二重化された交換局１の各
々に、同期パターン送出及び同期検出回路１０２と、切
替指示回路１０３とを設け、一方、二重化された集線多
重化装置３の各々に、同期パターン送出及び同期検出回
路１０１と、切替指示回路１０３とを設けて成り、かつ
、上記交換局１と伝送路２との間及び上記集線多重化装
置３と伝送路２との間に、上記切替指示回路１０３の指
示により伝送路の切替えを行なう切替回路１０５ 。In the same figure, the transmission line switching system of the present invention has duplex f
Exchange 1. It is applied to a system consisting of a transmission line 2 and a line concentrator multiplexing device 3, and each of the duplexed exchanges 1 is provided with a synchronization pattern sending and synchronization detection circuit 102 and a switching instruction circuit 103. Each of the concentrating multiplexing devices 3 is provided with a synchronization pattern sending and synchronization detection circuit 101 and a switching instruction circuit 103, and between the switching center 1 and the transmission line 2 and the concentrating multiplexing device 3 and the transmission line 2, a switching circuit 105 switches the transmission line according to instructions from the switching instruction circuit 103.
１０４を設けて構成される。104 is provided.
次に、上述のように構成される本発明伝送路切替方式の
作用について説明する。Next, the operation of the transmission line switching system of the present invention configured as described above will be explained.
伝送路２において同期外れとなるよう方伝送路障害が発
生すると、同期バクーン送出及び同期検出回路１０１及
び１０２より、切替指示回路１０３に伝送路切替信号が
送出されろ。該切替指示回路１．０３の指示により、伝
送路２に設けられた切替”回路１０４及び１０５は、伝
送路２の切替えを行方う。When a transmission line failure occurs in the transmission line 2 that causes synchronization to be lost, a transmission line switching signal is sent to the switching instruction circuit 103 from the synchronization switching output and synchronization detection circuits 101 and 102. According to the instruction from the switching instruction circuit 1.03, the switching circuits 104 and 105 provided in the transmission line 2 perform switching of the transmission line 2.
即ち、障害前に、第３図に示すように、０系現用の交換
局１とＯ糸塊用の集線多重化装置３とが現用伝送路２ａ
で接続され、同様に、１系予備の交換局１と１系予備の
集線多重化装置３とが予備伝送路２ｂで接続されている
とすると、伝送路障害が発生した場合、切替回路１０４
、１０５によシ、第４図に示すように、伝送路２ａと
２ｂとが切替って、０系が伝送路２ｂにより、一方、１
系が伝送路２ａにより接続される。That is, before the failure, as shown in FIG.
Similarly, assuming that the 1-system backup switching center 1 and the 1-system backup concentrator multiplexer 3 are connected via the backup transmission path 2b, if a transmission path failure occurs, the switching circuit 104
, 105, the transmission lines 2a and 2b are switched as shown in FIG.
The systems are connected by a transmission path 2a.
この切替えによって、交換系装置が切替わることなく、
伝送路のみが切替わり、交換系装置では、伝送路のしゅ
ん断と見なすことができる。従って、交換系装置は切替
わることなく、通信が継続できる。This switching eliminates the need to switch switching equipment.
Only the transmission line is switched, and in the switching system equipment, this can be regarded as a disconnection of the transmission line. Therefore, communication can be continued without switching the switching system equipment.
以上説明したように本発明は、同期信号発生回路、同期
外れ検出回路及び伝送路切替回路とを設ける構成とした
ことにより、伝送路障害が発生した時、交換系装置を切
替えずに伝送路のみを切替えで、接続された通信をその
１ま継続させて、交換系装置に影響を及はすことを防止
した効果がある。As explained above, the present invention is configured to include a synchronization signal generation circuit, an out-of-synchronization detection circuit, and a transmission line switching circuit, so that when a transmission line failure occurs, only the transmission line can be used without switching the switching equipment. This has the effect of preventing the connected communication from affecting the switching equipment by switching between the two and continuing the connected communication until the first one.
第１図は従来の接続形態を示すブロック図、第２図は本
発明の一実施例を示すブロック図、第３図及び第４図は
上記実施例における伝送路の切替状態を示す説明図であ
る。
ｊ・・・交換局 ２ （２ａ、２ｂ）・・・伝送路３・
・・集線多重化装置
１０１ 、０１２・・・同期パターン送出及び同期検出
回路１０３・・・切替指示回路
１０４ 、１０５・・・切暦°回路
出願人 日本電気株式会社
第１図
第２図
第３図
第４図FIG. 1 is a block diagram showing a conventional connection form, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIGS. 3 and 4 are explanatory diagrams showing switching states of transmission lines in the above embodiment. be. j... Switching station 2 (2a, 2b)... Transmission line 3.
...Line concentrator multiplexing device 101, 012...Synchronization pattern sending and synchronization detection circuit 103...Switching instruction circuit 104, 105...Circuit circuit Applicant: NEC Corporation Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
設置された集線多重化装置とを接続する二重化された伝
送路の切替方式において、上記交換局と集線多重化装置
とに、上記伝送路の同期信号発生回路、同期外れ検出回
路及び該検出回路の指示によシ上記二重化伝送路の籾、
用／予備の切替を行なう切替回路とを備えたことを特徴
とする伝送路切替方式。In a switching system for a duplex transmission line that connects a switching center and a remotely installed line concentrator/multiplexer whose working/backup is controlled by the switching center, the switching center and the line concentrator/multiplexer are provided with: According to the synchronization signal generation circuit, the out-of-synchronization detection circuit, and the instructions of the detection circuit of the transmission line, the paddy of the duplex transmission line,
A transmission line switching system characterized by comprising a switching circuit for switching between normal use and standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16156483A JPS6053332A (en) | 1983-09-02 | 1983-09-02 | Transmission line switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16156483A JPS6053332A (en) | 1983-09-02 | 1983-09-02 | Transmission line switching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6053332A true JPS6053332A (en) | 1985-03-27 |
Family
ID=15737506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16156483A Pending JPS6053332A (en) | 1983-09-02 | 1983-09-02 | Transmission line switching system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6053332A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0767155A (en) * | 1991-07-31 | 1995-03-10 | At & T Corp | Optical system |
-
1983
- 1983-09-02 JP JP16156483A patent/JPS6053332A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0767155A (en) * | 1991-07-31 | 1995-03-10 | At & T Corp | Optical system |
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