JPH0793592B2 - Protection switcher - Google Patents
Protection switcherInfo
- Publication number
- JPH0793592B2 JPH0793592B2 JP29219089A JP29219089A JPH0793592B2 JP H0793592 B2 JPH0793592 B2 JP H0793592B2 JP 29219089 A JP29219089 A JP 29219089A JP 29219089 A JP29219089 A JP 29219089A JP H0793592 B2 JPH0793592 B2 JP H0793592B2
- Authority
- JP
- Japan
- Prior art keywords
- communication device
- circuit
- input signal
- distribution circuit
- standby
- 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.)
- Expired - Lifetime
Links
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は通信装置の二重化システムに用いられる所謂プ
ロテクションスイッチャーに関する。Description: TECHNICAL FIELD The present invention relates to a so-called protection switcher used in a duplex system of a communication device.
（従来の技術） 従来，通信装置の二重化システムに用いられるプロテク
ションスイッチャーとして，例えば，第２図及び第３図
に示すものがある。(Prior Art) Conventionally, as a protection switcher used in a duplex system of a communication device, there is, for example, one shown in FIG. 2 and FIG.
第２図に示すプロテクションスイッチャーの場合，ハイ
ブリッドトランス21を用いて入力信号の分配を行ってお
り，一方，第３図に示すスイッチャーの場合，継電器31
を用いて回線切替を行っている。In the case of the protection switcher shown in FIG. 2, the input signal is distributed using the hybrid transformer 21, while in the case of the switcher shown in FIG. 3, the relay 31 is used.
The line is switched using.
（発明が解決しようとする課題） 上述のように，従来のプロテクションスイッチャーで
は，ハイブリッドトランスによる入力信号分配方式をと
ると，ハイブリッドトランスでの入力信号減衰を補うた
めに増幅回路を備えなければならない。ところが，増幅
回路では迂回回路を有していないから，増幅回路の障害
あるいは電源断に対処できないという問題点がある。(Problems to be Solved by the Invention) As described above, in the conventional protection switcher, if the input signal distribution system by the hybrid transformer is adopted, the amplification circuit must be provided to compensate the input signal attenuation in the hybrid transformer. However, since the amplifier circuit does not have a bypass circuit, there is a problem that it is not possible to cope with a failure of the amplifier circuit or a power failure.
また，継電器による回線切替方式をとると，入力信号を
分配して稼動側通信装置（現用通信装置）と待機側通信
装置（予備通信装置）に同時に加えることができないた
め，待機側通信装置で入力信号断のアラームが生じてし
まうという問題点がある。In addition, if the line switching method using a relay is adopted, the input signal cannot be distributed and added to the working communication device (active communication device) and the standby communication device (standby communication device) at the same time. There is a problem that a signal disconnection alarm occurs.
本発明の目的は通信回線が不通となることのないプロテ
クションスイッチャーを提供することにある。An object of the present invention is to provide a protection switcher in which a communication line is not cut off.
本発明の他の目的は待機側通信装置で入力信号断のアラ
ームが生じることのないプロテクションスイッチャーを
提供することにある。Another object of the present invention is to provide a protection switcher which does not cause an input signal disconnection alarm in a standby communication device.
（課題を解決するための手段） 本発明によれば，稼動側通信装置と待機側通信装置とを
有する二重化システムに用いられ，入力信号を前記稼動
側通信装置及び前記待機側通信装置に分配する分配回路
と，該分配回路を迂回して前記入力信号を前記稼動側通
信装置及び前記待機側通信装置に与える迂回回路と，前
記分配回路及び前記迂回回路を選択する選択手段とを有
し，前記分配回路で前記入力信号の断が検出されると，
前記選択手段によって一旦前記分配回路から前記迂回回
路への切替が行われ，さらに前記稼動側通信装置で前記
入力信号の断が検出されると，前記選択手段によって前
記迂回回路から前記分配回路への復帰を行う第１の切替
モードと，前記稼動側通信装置で前記入力信号が受信さ
れると，前記選択手段によって前記迂回回路への切替状
態を保持する第２の切替モードとによって切替制御を行
うようにしたことを特徴とするプロテクションスイッチ
ャーが得られる。(Means for Solving the Problem) According to the present invention, it is used in a duplex system having an active communication device and a standby communication device, and distributes an input signal to the active communication device and the standby communication device. A distribution circuit; a detour circuit that bypasses the distribution circuit and applies the input signal to the working communication device and the standby communication device; and a selection unit that selects the distribution circuit and the detour circuit. When the disconnection of the input signal is detected by the distribution circuit,
When the selecting unit once switches from the distribution circuit to the detour circuit, and when the operating-side communication device detects disconnection of the input signal, the selecting unit switches the detour circuit to the distribution circuit. Switching control is performed by a first switching mode for returning and a second switching mode for holding the switching state to the bypass circuit by the selecting means when the input signal is received by the working communication device. A protection switcher characterized by doing so is obtained.
（実施例） 次に本発明について実施例によって説明する。(Examples) Next, the present invention will be described with reference to Examples.
第１図を参照して，入力バイポーラ信号が入力信号端子
１から分配回路／迂回回路切換継電器2,レシーバ３を通
ってバイポーラ／ユニポーラ変換器４に入力される。バ
イポーラ／ユニポーラ変換器４で入力バイポーラ信号は
バイポーラ信号からユニポーラ信号に変換され，このユ
ニポーラ信号は二分配されてそれぞれ，ユニポーラ／バ
イポーラ変換器5,6でバイポーラ信号に変換され，分配
回路／迂回回路切換継電器７を介して稼動側通信装置入
力信号端子14から稼動側通信装置８へ，待機側通信装置
入力信号端子16から待機側通信装置９へ送られる。With reference to FIG. 1, an input bipolar signal is input from an input signal terminal 1 to a bipolar / unipolar converter 4 through a distribution circuit / detour circuit switching relay 2 and a receiver 3. The input bipolar signal is converted from a bipolar signal to a unipolar signal by the bipolar / unipolar converter 4, and the unipolar signal is divided into two and converted into bipolar signals by the unipolar / bipolar converters 5 and 6, respectively, and a distribution circuit / a bypass circuit is provided. The signals are sent from the working communication device input signal terminal 14 to the working communication device 8 and from the standby communication device input signal terminal 16 to the standby communication device 9 via the switching relay 7.
稼動側通信装置８からの出力バイポーラ信号は，稼動側
通信装置出力端子15から入り，稼動側／待機側通信装置
切換継電器10を介して出力信号端子11から回線へ送られ
る。The output bipolar signal from the working communication device 8 enters from the working communication device output terminal 15 and is sent to the line from the output signal terminal 11 via the working / standby communication device switching relay 10.
稼動側通信装置８に障害が発生すると，稼動側通信装置
８から稼動側／待機側通信装置切換要求信号13が送出さ
れる。稼動側／待機側通信装置切換要求信号13が送出さ
れると，稼動側／待機側通信装置切換継電器10によっ
て，出力バイポーラ信号の経路及び迂回回路の経路を稼
動側通信装置８から待機側通信装置９へと切換える。When a failure occurs in the working communication device 8, the working communication device 8 sends a working / standby communication device switching request signal 13. When the working / standby side communication device switching request signal 13 is sent, the working / standby side communication device switching relay 10 causes the working side communication device 8 to route the output bipolar signal route and the bypass circuit route. Switch to 9.
また，バイポーラ／ユニポーラ変換器４において信号断
が検出されると，分配回路／迂回回路切換継電器２及び
７は迂回回路側に接続される。入力バイポーラ信号の信
号経路が迂回回路側となると，入力バイポーラ信号は稼
動側／待機側通信装置切換継電器10によって接続されて
いる側の通信装置にのみ加えられることになる。この
際，迂回回路に接続されている通信装置から入力信号断
アラーム信号12が送出されれば，バイポーラ／ユニポー
ラ変換器４で検出された信号断は回線断によるものと判
断し入力信号経路を分配回路／迂回回路切換継電器２及
び７により分配回路側へ復帰させるが入力信号断アラー
ム信号12が送出されなかった場合，レシーバ8,バイポー
ラ／ユニポーラ変換器４の障害によるものと判断し，入
力信号経路を迂回回路側に保持する。Further, when a signal break is detected in the bipolar / unipolar converter 4, the distribution circuit / detour circuit switching relays 2 and 7 are connected to the detour circuit side. When the signal path of the input bipolar signal is on the side of the bypass circuit, the input bipolar signal is applied only to the communication device on the side connected by the working / standby communication device switching relay 10. At this time, if the input signal disconnection alarm signal 12 is sent from the communication device connected to the bypass circuit, it is determined that the signal disconnection detected by the bipolar / unipolar converter 4 is due to the line disconnection, and the input signal path is distributed. When the circuit / rerouting circuit switching relays 2 and 7 are used to restore to the distribution circuit side, but the input signal disconnection alarm signal 12 is not sent, it is determined that the receiver 8 and the bipolar / unipolar converter 4 have failed, and the input signal path is determined. Is held on the side of the bypass circuit.
通信装置二重化システム用プロテクションスイッチャー
の電源断となった場合には，自動的に分配回路／迂回回
路切換継電器2,7は，迂回回路側に接続されるが，稼動
側／待機側通信装置切換継電器10は，接点保持型継電器
を用いているため常に現在の接点方向を保つ。When the power of the protection switcher for the communication device duplication system is cut off, the distribution circuit / detour circuit switching relays 2 and 7 are automatically connected to the detour circuit side, but the operating / standby side communication device switching relays are connected. Since 10 uses a contact-holding type relay, it always maintains the current contact direction.
（発明の効果） 以上説明したように，本発明では入力信号であるバイポ
ーラ信号をユニポーラ信号に変換した後，二分配し，分
配されたユニポーラ信号をバイポーラ信号に変換するこ
とで，バイポーラ信号の二分配を行い，稼動側通信装置
及び待機側通信装置に入力信号を送ることができるた
め，待機側通信装置において入力信号断のアラームは生
じることがない。(Effects of the Invention) As described above, according to the present invention, a bipolar signal, which is an input signal, is converted into a unipolar signal and then divided into two, and the distributed unipolar signal is converted into a bipolar signal. Since distribution can be performed and an input signal can be sent to the communication device on the operating side and the communication device on the standby side, an alarm of an input signal disconnection does not occur in the communication device on the standby side.
またバイポーラ／ユニポーラ変換部において入力信号を
常時監視し，信号断の原因が分配回路の回路障害である
とき電源断により分配回路内の能動部の動作が不可能に
なった場合，迂回回路に切換えることにより通信回路が
切断されることを防ぐことができる。In addition, the input signal is constantly monitored in the bipolar / unipolar converter, and when the cause of the signal disconnection is a circuit failure in the distribution circuit, if the operation of the active part in the distribution circuit becomes impossible due to power failure, the circuit is switched to the detour circuit. This can prevent the communication circuit from being disconnected.
第１図は本発明が適用された二重化システムを示すブロ
ック図，第２図及び第３図はそれぞれ従来例を示すブロ
ック図である。 １……入力信号端子,2,7……分配回路／迂回回路切換継
電器,3……レシーバ,4……バイポーラ／ユニポーラ変換
器,5,6……ユニポーラ／バイポーラ変換器,8……稼動側
通信装置,9……待機側通信装置,10……稼動側／待機側
通信装置切換継電器,11……出力信号端子,12……入力信
号断アラーム信号,13……稼動側／待機側通信装置切換
要求信号,14……稼動側通信装置入力信号端子,15……稼
動側通信装置出力信号端子,16……待機側通信装置入力
信号端子,17……待機側通信装置出力信号端子。FIG. 1 is a block diagram showing a duplex system to which the present invention is applied, and FIGS. 2 and 3 are block diagrams showing conventional examples. 1 …… Input signal terminal, 2,7 …… Distribution circuit / detour circuit switching relay, 3 …… Receiver, 4 …… Bipolar / unipolar converter, 5,6 …… Unipolar / bipolar converter, 8 …… Operating side Communication device, 9 …… Standby side communication device, 10 …… Operating side / standby side communication device switching relay, 11 …… Output signal terminal, 12 …… Input signal disconnection alarm signal, 13 …… Operating side / standby side communication device Switching request signal, 14 ... Working communication device input signal terminal, 15 ... Working communication device output signal terminal, 16 ... Standby communication device input signal terminal, 17 ... Standby communication device output signal terminal.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 若生 克彦 宮城県黒川郡大和町吉岡字雷神２番地 宮 城日本電気株式会社内 (56)参考文献 特開 昭59−176931（ＪＰ，Ａ) 特開 昭61−59953（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Katsuhiko Waka, 2nd Raijin, Yoshioka, Yamato-cho, Kurokawa-gun, Miyagi Miyagi NEC Corporation (56) Reference JP-A-59-176931 (JP, A) Sho 61-59953 (JP, A)
Claims (1)
る二重化システムに用いられ，入力信号を前記稼動側通
信装置及び前記待機側通信装置に分配する分配回路と，
該分配回路を迂回して前記入力信号を前記稼動側通信装
置及び前記待機側通信装置に与える迂回回路と，前記分
配回路及び前記迂回回路を選択する選択手段とを有し，
前記分配回路で前記入力信号の断が検出されると，前記
選択手段によって一旦前記分配回路から前記迂回回路へ
の切替が行われ，さらに前記稼動側通信装置で前記入力
信号の断が検出されると，前記選択手段によって前記迂
回回路から前記分配回路への復帰を行う第１の切替モー
ドと，前記稼動側通信装置で前記入力信号が受信される
と，前記選択手段によって前記迂回回路への切替状態を
保持する第２の切替モードとによって切替制御を行うよ
うにしたことを特徴とするプロテクションスイッチャ
ー。1. A distribution circuit for use in a duplex system having an active communication device and a standby communication device, for distributing an input signal to the active communication device and the standby communication device.
A bypass circuit that bypasses the distribution circuit and applies the input signal to the working communication device and the standby communication device; and a selection unit that selects the distribution circuit and the bypass circuit.
When the distribution circuit detects the disconnection of the input signal, the selecting unit temporarily switches the distribution circuit to the bypass circuit, and further, the active communication device detects the disconnection of the input signal. And a first switching mode in which the selecting unit restores the detour circuit to the distribution circuit, and when the operating side communication device receives the input signal, the selecting unit switches to the detour circuit. A protection switcher characterized in that switching control is performed according to a second switching mode for holding a state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29219089A JPH0793592B2 (en) | 1989-11-13 | 1989-11-13 | Protection switcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29219089A JPH0793592B2 (en) | 1989-11-13 | 1989-11-13 | Protection switcher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03154434A JPH03154434A (en) | 1991-07-02 |
| JPH0793592B2 true JPH0793592B2 (en) | 1995-10-09 |
Family
ID=17778717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29219089A Expired - Lifetime JPH0793592B2 (en) | 1989-11-13 | 1989-11-13 | Protection switcher |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0793592B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941637A (en) * | 2013-01-18 | 2014-07-23 | 发那科株式会社 | Machine control panel |
-
1989
- 1989-11-13 JP JP29219089A patent/JPH0793592B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941637A (en) * | 2013-01-18 | 2014-07-23 | 发那科株式会社 | Machine control panel |
| JP2014137800A (en) * | 2013-01-18 | 2014-07-28 | Fanuc Ltd | Machine operation panel |
| US10209699B2 (en) | 2013-01-18 | 2019-02-19 | Fanuc Corporation | Machine control panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03154434A (en) | 1991-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6341457B2 (en) | ||
| JPH05260081A (en) | Communication network management system | |
| JPH0793592B2 (en) | Protection switcher | |
| JPS6239921A (en) | Line switching equipment | |
| JP2625814B2 (en) | Power supply current switching circuit | |
| JP3056779B2 (en) | Optical transmission system | |
| JP2501191Y2 (en) | CATV system repeater amplifier | |
| JP2737761B2 (en) | Digital transmission equipment | |
| JPH03192931A (en) | Protection switching device with detouring circuit | |
| JPH02141149A (en) | Switching method for protecting communication equipment with detouring circuit | |
| JPH0342930A (en) | Line switching device | |
| JPS58182937A (en) | In-trouble switching system of communication controller | |
| JPH0817393B2 (en) | Transmission line branching device | |
| JP2737769B2 (en) | Control method of OW communication | |
| JP2641345B2 (en) | Wireless transmission device | |
| JPH0661888A (en) | Line changeover system | |
| JPS59154894A (en) | Trunk switching system of trunk line at failure | |
| JPH0439246B2 (en) | ||
| JPH0528532B2 (en) | ||
| JPH0398331A (en) | Optical output monitor system | |
| JPH0454736A (en) | Matrix redundancy system for high output amplifier | |
| JPH06197044A (en) | Transmitter | |
| JPS63248255A (en) | On-line data transmission system | |
| JPS60141030A (en) | Automatic switching device of submarine cable communication system | |
| JPH02272844A (en) | Head end device |