JPH0487425A - Circuit switching device - Google Patents

Circuit switching device

Info

Publication number
JPH0487425A
JPH0487425A JP2201514A JP20151490A JPH0487425A JP H0487425 A JPH0487425 A JP H0487425A JP 2201514 A JP2201514 A JP 2201514A JP 20151490 A JP20151490 A JP 20151490A JP H0487425 A JPH0487425 A JP H0487425A
Authority
JP
Japan
Prior art keywords
line
stand
circuit
circuits
protection
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
Application number
JP2201514A
Other languages
Japanese (ja)
Inventor
Masanori Tanaka
真紀 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2201514A priority Critical patent/JPH0487425A/en
Publication of JPH0487425A publication Critical patent/JPH0487425A/en
Pending legal-status Critical Current

Links

Landscapes

  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To obtain the system at a low cost, while holding its reliability as it is by providing each stand-by circuit so that they can be connected or detached mutually through a switch means, and providing a stand-by circuit terminating equipment by one piece each against those which are connected to each other in these stand-by circuits. CONSTITUTION:This circuit switching device switches an existing circuit 7 to a stand-by circuit 2, when an existing circuit terminating equipment 5 causes a fault, and switches the equipment concerned 5 which causes the fault to a stand-by circuit terminating equipment 6 connected to a stand-by circuit 2. In this embodiment, with respect to (n) pieces of circuits, (m) pieces of stand-by circuit terminating equipments 6 are provided on the stand-by circuit 2 through an adaptor (connector) 4. The existing circuit terminating equipment 5 is connected to the respective existing circuits 7. A switch means 5 is closed in (m-1) parts, and at every group in whick the stand-by circuits are connected to each other, one piece of stand-by circuit terminating equipment 6 is used in common. In the same group, it is impossible to cope simultaneously with a fault of two circuits or more. Accordingly, the device copes with the fault by increasing or decreasing the number of mutual connections of the stand-by circuits in accordance with a fault generation rate of the circuit.

Description

【発明の詳細な説明】 〔概　要〕 回線終端装置が接続されている回線の障害発生時におけ
るバックアップのための回線切り替え装置に関し、 予備回線終端装置を効率的に配置してシステムを低価格
とし、しかも回線を使用するシステムの信軌性はそのま
ま保持できるようにすることを目的とし、 通信回線における現用の回線終端装置が障害を起こした
時に、現用回線を予備回線に切り替えて、該障害を起こ
した装置を予備回線に接続されている予備回線終端装置
に切り替えるようにした複数回線から構成されるシステ
ムにおける回線切り替え装置であって、前記各予備回線
をスイッチ手段を介して相互に接続または切り離しが可
能なようにし、前記予備回線のうち互いに接続されたも
のに対して予備回線終端装置を１個ずつ設けるように構
成する。[Detailed Description of the Invention] [Summary] Regarding a line switching device for backup when a failure occurs in a line to which a line termination device is connected, the system can be made at a low cost by efficiently arranging a backup line termination device. Moreover, the purpose is to maintain the reliability of the system that uses the line, and when a failure occurs in the current line termination equipment of the communication line, the current line is switched to a backup line and the failure is rectified. A line switching device in a system consisting of a plurality of lines configured to switch a faulty device to a protection line terminating device connected to a protection line, wherein each protection line is connected or disconnected from each other via a switch means. The configuration is such that one protection line termination device is provided for each of the protection lines that are connected to each other.

〔産業上の利用分野〕[Industrial application field]

本発明は、回線終端装置が接続されている回線の障害発
生時におけるバックアップのための回線切り替え装置に
関する。The present invention relates to a line switching device for backing up when a failure occurs in a line to which a line termination device is connected.

近年のコンピュータの２、速な普及に伴い、回線を用い
たデータ通信システムが非常に多く用いられるようにな
り、このシステムの信軌性の向上が要求されている０通
常の回線を用いたシステムでは、１つの回線終端装置が
接続された一本の回線に対して、予備の回線終端装置が
接続された予備の回線を設置し、障害時には予備回線に
切り替えるシステムを構成しているが、すべての回線を
全二重化するのは無駄であり、障害発生頻度の高い回線
は全二重化し、頻度の低い回線は何本かに一本の割合で
予備回線を設置するのが効果的である。With the rapid spread of computers in recent years, data communication systems using lines have come into widespread use, and improvements in the reliability of these systems are required.0Systems using normal lines In this system, a backup line with a backup line termination device is installed for one line connected to one line termination device, and the system switches to the backup line in the event of a failure. It is wasteful to make all lines full-duplex, so it is effective to make lines with high frequency of failure full-duplex, and to install backup lines for every few lines with low frequency of failure.

〔従来の技術〕[Conventional technology]

従来、１つの回線終端装置が接続された一本の回線に対
して、それぞれ予備の回線終端装置が接続された予備の
回線が設置されていて、障害時には予備回線に切り替え
ることによって、他の正常な回線終端装置が接続された
予備の回線に接続されるように対処していた。Conventionally, for each line to which one line termination device is connected, a spare line with a spare line termination device connected to each line has been installed, and in the event of a failure, switching to the spare line allows other normal lines to be connected. A line termination device was connected to the connected spare line.

［発明が解決しようとする課題〕 上述のように、システム上必要な回線および回線装置そ
れぞれに、障害時バックアップ用の回線および回線終端
装置が必要となり、価格的にも無駄が多いという課題を
生じていた。[Problems to be Solved by the Invention] As mentioned above, each line and line device necessary for the system requires a line and line termination device for backup in the event of a failure, which creates the problem of being wasteful in terms of cost. was.

従って、本発明の目的は、予備回線終端装置を効率的に
配置してシステムを低価格とし、しかも回線を使用する
システムの信軌性はそのまま保持できるようにすること
にある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to efficiently arrange standby line termination devices to reduce the cost of the system, and to maintain the reliability of the system using the line.

〔課題を解決するための手段〕[Means to solve the problem]

本発明においては、第１図に例示されるように、通信回
線における現用の回線終端装置５が障害を起こした時に
、現用回線７を予備回ｆ％！ｌこ切り替えて、該障害を
起こした装置５を予備回線２に接続されている予備回線
終端装置に切り替えるようにした複数回線から構成され
るシステムにおける回線切り替え装置であって、前記各
予備回線２をスイッチ手段３を介して相互に接続または
切り離しが可能なようにし、前記予備回線のうち互いに
接続されたものに対して予備回線終端装置６を１個ずつ
設けるようにしたことを特徴とする回線切り替え装置が
提供される。In the present invention, as illustrated in FIG. 1, when the active line termination device 5 in the communication line fails, the active line 7 is switched to the backup line f%! A line switching device in a system constituted by a plurality of lines configured to switch the faulty device 5 to a protection line terminating device connected to a protection line 2, wherein each protection line 2 can be mutually connected or disconnected via a switch means 3, and one protection line termination device 6 is provided for each of the protection lines that are connected to each other. A switching device is provided.

〔作　用〕[For production]

上述の回線切り替え装置を用いれば、例えば第１図のよ
うな場合、２つの予備回線に対し１つの予備回線終端装
置６を設け、２つの予備回線の間にスイッチ手段３を設
け、このスイッチ手段の開閉に応じて、２つの予備回線
が接続されたり、切り離されたりできる。もし、スイッ
チ手段３を閉じておけば、いずれか一方の回線の現用回
線終端装置が障害を起こした時、その回線の切り替え手
段１を予備側に切り替えれば、予備回線終端装置６が現
用の装置にとって代ることができる。If the above line switching device is used, for example in the case shown in FIG. 1, one protection line termination device 6 is provided for two protection lines, a switch means 3 is provided between the two protection lines, and this switch means The two protection lines can be connected or disconnected depending on whether the If the switching means 3 is closed, when the working line terminating device of one of the lines fails, if the switching means 1 of that line is switched to the protection side, the protection line terminating device 6 becomes the working device. can be replaced by

〔実施例〕〔Example〕

本発明の第１実施例としての回線切り替え装置を用いた
システムの回路図が第２図に示される。A circuit diagram of a system using a line switching device as a first embodiment of the present invention is shown in FIG.

この実施例ではｎ個の回線に対しｍ個の予備回線終端装
置６がアダプタ（コネクタ）４を介して予備回線２に設
けられている。現用回線終端装置はそれぞれの現用回線
７（矢印で表示）に接続されるが、図では省略している
。スイッチ手段３は（ｍ−１）箇所で閉じられており、
予備回線が互いに接続されているグループごとに１個の
予備回線終端装置を共用する。同じグループ内では同時
に２回線以上の障害には応じられない。従って、回線の
障害発生率に応じて予備回線の相互接続数を増減して対
応する必要がある。In this embodiment, m protection line termination devices 6 are provided on the protection line 2 via adapters (connectors) 4 for n lines. A working line termination device is connected to each working line 7 (indicated by an arrow), but is omitted from the figure. The switch means 3 is closed at (m-1) points,
One protection line termination device is shared by each group in which protection lines are connected to each other. Failures of two or more lines within the same group cannot be responded to at the same time. Therefore, it is necessary to increase or decrease the number of interconnections of protection lines depending on the failure occurrence rate of the line.

第２の実施例が第３図に示される。この実施例ではｎＸ
ｇ本の回線に対して、予備回線終端装置をアダプタ４に
接続する場合、アダプタ４を介してｎ個の回線グループ
相互間を接続して行うようにすることができる。A second embodiment is shown in FIG. In this example, nX
When connecting the backup line termination device to the adapter 4 for g lines, n line groups can be connected to each other via the adapter 4.

第３の実施例が第４図に示される。この図ではスイッチ
手段３の閉じられたものは接続された回路として、開か
れたものは非接続の回路として表示されている。そして
予備回線終端装置としてモデムが例示されている。この
例では１つの予備モデムを共用するグループが必要に応
じて任意に組み合わせられている。この図においても矢
印は現用回線を示し、現用回線終端装置は記載を省略し
ている。A third embodiment is shown in FIG. In this figure, a closed switch means 3 is shown as a connected circuit, and an open switch means 3 is shown as an unconnected circuit. A modem is exemplified as a protection line terminating device. In this example, groups that share one standby modem are arbitrarily combined as necessary. In this figure as well, arrows indicate working lines, and illustration of the working line terminating device is omitted.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、予備回線終端装置を効率的に配置して
システムを低価格とし、しかも回線を使用するシステム
の信顛性はそのまま保持できる。According to the present invention, the cost of the system can be reduced by efficiently arranging the backup line termination device, and the reliability of the system using the line can be maintained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明を説明する回路図、 第２図は本発明の第１実施例の回線切り替え装置を用い
たシステムの回路図、 第３図は第２実施例の回線切り替え装置を用いたシステ
ムのブロック図、および 第４図は第３実施例を用いたシステムの回路図である。 図において、 ｌ・・・現用予備切り替えスイッチ、 ２・・・予備回線、 ３・・・スイッチ手段、 ４・・・アダプタ、 ５・・・回線終端装置、 ６・・・予備回線終端装置、 ７・・・現用回線、 である。Fig. 1 is a circuit diagram for explaining the present invention, Fig. 2 is a circuit diagram of a system using the line switching device of the first embodiment of the present invention, and Fig. 3 is a circuit diagram of a system using the line switching device of the second embodiment of the present invention. A block diagram of the system, and FIG. 4 is a circuit diagram of a system using the third embodiment. In the figure, l... Working protection changeover switch, 2... Protection line, 3... Switch means, 4... Adapter, 5... Line termination device, 6... Protection line termination device, 7 ...This is the working line.

Claims (1)

【特許請求の範囲】[Claims] 通信回線における現用の回線終端装置（５）が障害を起
こした時に、現用回線（７）を予備回線（２）に切り替
えて、該障害を起こした装置（５）を予備回線（２）に
接続されている予備回線終端装置に切り替えるようにし
た複数回線から構成されるシステムにおける回線切り替
え装置であって、前記各予備回線（２）をスイッチ手段
（３）を介して相互に接続または切り離しが可能なよう
にし、前記予備回線のうち互いに接続されたものに対し
て予備回線終端装置（６）を１個ずつ設けるようにした
ことを特徴とする回線切り替え装置。When the current line termination device (5) in the communication line has a fault, the current line (7) is switched to the protection line (2) and the faulty device (5) is connected to the protection line (2). A line switching device in a system consisting of a plurality of lines configured to switch to a backup line termination device that is configured to switch to a backup line termination device, in which each of the backup lines (2) can be mutually connected or disconnected via a switch means (3). A line switching device characterized in that one protection line termination device (6) is provided for each of the protection lines that are connected to each other.
JP2201514A 1990-07-31 1990-07-31 Circuit switching device Pending JPH0487425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2201514A JPH0487425A (en) 1990-07-31 1990-07-31 Circuit switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2201514A JPH0487425A (en) 1990-07-31 1990-07-31 Circuit switching device

Publications (1)

Publication Number Publication Date
JPH0487425A true JPH0487425A (en) 1992-03-19

Family

ID=16442309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2201514A Pending JPH0487425A (en) 1990-07-31 1990-07-31 Circuit switching device

Country Status (1)

Country Link
JP (1) JPH0487425A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5325532A (en) * 1976-08-24 1978-03-09 Garatsuto Arekusandaa Anhydrous sodium aspirin with high storage stability
JP2003531118A (en) * 2000-03-10 2003-10-21 ブリストル−マイヤーズ スクイブ カンパニー Inhibitors and methods for dipeptidyl peptidase IV having a cyclopropyl-fused pyrrolidine skeleton
JP2006516121A (en) * 2002-12-09 2006-06-22 ブリストル−マイヤーズ　スクイブ　カンパニー Methods and compounds for producing dipeptidyl peptidase IV inhibitors and intermediates thereof
JP2007501231A (en) * 2003-08-01 2007-01-25 ブリストル−マイヤーズ　スクイブ　カンパニー Adamantylglycine-based inhibitors and methods of dipeptidyl peptidase IV
JP2008501025A (en) * 2004-05-28 2008-01-17 ブリストル−マイヤーズ　スクイブ　カンパニー Coated tablet formulation and method
JP2008506682A (en) * 2004-07-16 2008-03-06 ワーナー−ランバート カンパニー リミテッド ライアビリティー カンパニー Hair growth promoter
WO2008131149A2 (en) * 2007-04-20 2008-10-30 Bristol-Myers Squibb Company Crystal forms of saxagliptin and processes for preparing same
JP2012523395A (en) * 2009-04-09 2012-10-04 サンド・アクチエンゲゼルシヤフト Crystal form of saxagliptin

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5325532A (en) * 1976-08-24 1978-03-09 Garatsuto Arekusandaa Anhydrous sodium aspirin with high storage stability
JP2003531118A (en) * 2000-03-10 2003-10-21 ブリストル−マイヤーズ スクイブ カンパニー Inhibitors and methods for dipeptidyl peptidase IV having a cyclopropyl-fused pyrrolidine skeleton
JP2006516121A (en) * 2002-12-09 2006-06-22 ブリストル−マイヤーズ　スクイブ　カンパニー Methods and compounds for producing dipeptidyl peptidase IV inhibitors and intermediates thereof
JP2007501231A (en) * 2003-08-01 2007-01-25 ブリストル−マイヤーズ　スクイブ　カンパニー Adamantylglycine-based inhibitors and methods of dipeptidyl peptidase IV
JP2008501025A (en) * 2004-05-28 2008-01-17 ブリストル−マイヤーズ　スクイブ　カンパニー Coated tablet formulation and method
JP2008506682A (en) * 2004-07-16 2008-03-06 ワーナー−ランバート カンパニー リミテッド ライアビリティー カンパニー Hair growth promoter
WO2008131149A2 (en) * 2007-04-20 2008-10-30 Bristol-Myers Squibb Company Crystal forms of saxagliptin and processes for preparing same
JP2012523395A (en) * 2009-04-09 2012-10-04 サンド・アクチエンゲゼルシヤフト Crystal form of saxagliptin

Similar Documents

Publication Publication Date Title
JPH02257735A (en) Standby line control system in network control path network
CN110247809B (en) Communication control method of double-ring network control system
CN112822039A (en) Method for switching master/standby modes of dual-computer hot standby system
CN115242710A (en) A data transmission channel switching system
CN209930261U (en) Bypass function circuit supporting system starting process, fault and crash
JP4781696B2 (en) IP phone system
CN220359181U (en) Ethernet switch with bypass electrical port
RU2755528C1 (en) Multi-contact switching system with eight power contact groups connected in a mixed circuit
JP3605294B2 (en) Switch device
JP4579018B2 (en) IP phone system
JPS58182359A (en) Self-control system switching system of electronic exchange
JPH04192940A (en) Optical lan system
KR940008779B1 (en) Common channel signalling method
JP4781697B2 (en) IP phone system
JP4628823B2 (en) IP phone system
JP3570334B2 (en) System switching device
JP4916670B2 (en) IP phone system
JPH04290032A (en) Line changeover device in data transmission system utilizing isdn
CN114362343A (en) Power distribution control device, system and method
JPS61122759A (en) Information processing system having monitoring function network
JPS5846759A (en) Fault replacing system
JPS62219720A (en) Transmission line switching system
JPS6223652A (en) Data transmission system
JPS6076820A (en) Self-diagnosis system
JPS6359224A (en) Line switching device