JPH05136733A - Optical fiber transmission system - Google Patents
Optical fiber transmission systemInfo
- Publication number
- JPH05136733A JPH05136733A JP29743991A JP29743991A JPH05136733A JP H05136733 A JPH05136733 A JP H05136733A JP 29743991 A JP29743991 A JP 29743991A JP 29743991 A JP29743991 A JP 29743991A JP H05136733 A JPH05136733 A JP H05136733A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- station side
- receiver
- optical fiber
- side optical
- 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
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Optical Communication System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は光ファイバ伝送システ
ム、より具体的には光ファイバ伝送システムにおける光
冗長構成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber transmission system, and more particularly to an optical redundant configuration in an optical fiber transmission system.
【０００２】[0002]
【従来の技術】光ファイバ伝送システムは、たとえば加
入者側に設置された加入者側光送受信装置（以後、加入
者側装置と称す）と、これと対向して局側に設けられた
局側光送受信装置（以後、加入者側装置と称す）とが１
本の光ファイバにより接続されている。局側装置に対し
加入者側装置が１対１に存在するこのような光ファイバ
伝送システムでは、従来、局側装置の故障により光信号
の送受信ができなくなることを防ぐため、同様のシステ
ムを１加入者毎に２セット設けて二重化する冗長構成を
とっていた。2. Description of the Related Art An optical fiber transmission system includes, for example, a subscriber side optical transmitter / receiver installed on the subscriber side (hereinafter referred to as a subscriber side apparatus), and a station side provided opposite the station side. Optical transmitter / receiver (hereinafter referred to as subscriber side device) is 1
It is connected by a book optical fiber. In such an optical fiber transmission system in which there is a one-to-one subscriber side device with respect to the station side device, conventionally, in order to prevent the failure of the station side device to prevent transmission / reception of optical signals, a similar system is used. It has a redundant configuration in which two sets are provided for each subscriber and are duplicated.
【０００３】図７には、このような冗長構成をとる光フ
ァイバ伝送システムの構成例が示されている。加入者側
装置５０−１〜５０−ｎはそれぞれ、通常時に使用され
る加入者側光送受信部１０−ａと故障時に使用される加
入者側光送受信部10−ｂとにより構成される。同様に局
側装置６０−１〜６０−ｎはそれぞれ、伝送路光ファイ
バ２００−ａを介して加入者側光送受信部１０−ａに接
続される局側光送受信部１４−ａと、伝送路光ファイバ
２００−ｂを介して加入者側光送受信部１０−ｂに接続
される局側光送受信部１４−ｂとにより構成されてい
る。このような光ファイバ伝送システムにおいて、通常
時は、伝送路光ファイバ２００−ａを介して加入者側光
送受信部１０−ａと局側光送受信部１４−ａにより情報
の伝送を行う。FIG. 7 shows a configuration example of an optical fiber transmission system having such a redundant configuration. Each of the subscriber side devices 50-1 to 50-n is composed of a subscriber side optical transmitter / receiver 10-a which is normally used and a subscriber side optical transmitter / receiver 10-b which is used when there is a failure. Similarly, each of the station side devices 60-1 to 60-n has a station side optical transmitter / receiver 14-a connected to the subscriber side optical transmitter / receiver 10-a via a transmission path optical fiber 200-a and a transmission line. It is composed of a station side optical transmitter / receiver 14-b connected to a subscriber side optical transmitter / receiver 10-b via an optical fiber 200-b. In such an optical fiber transmission system, normally, information is transmitted by the subscriber side optical transmission / reception unit 10-a and the station side optical transmission / reception unit 14-a via the transmission line optical fiber 200-a.
【０００４】また、何らかの理由でたとえば局側光送受
信部１４−ａ等が故障したとき、予備系の局側光送受信
部１４−ｂにより伝送路光ファイバ２００−ｂを介して
加入者側光送受信部１０−ｂと情報の伝送を行う。この
ように従来の光ファイバ伝送システムでは、１加入者に
対して加入者側装置の光送受信部と局側装置の光送受信
部を二重化構成することにより故障時における復旧処理
を行うものであった。When the station side optical transceiver 14-a or the like fails for some reason, the standby side optical transceiver 14-b of the standby system transmits / receives the subscriber side optical transmission / reception via the transmission line optical fiber 200-b. Information is transmitted to the unit 10-b. As described above, in the conventional optical fiber transmission system, for one subscriber, the optical transmission / reception unit of the subscriber side device and the optical transmission / reception unit of the station side device are duplicated to perform recovery processing in the event of a failure. ..
【０００５】[0005]
【発明が解決しようとする課題】しかしながらこのよう
な従来技術では、１加入者毎に加入者側光送受信部と局
側光送受信部をそれぞれ２セット用意しなければならな
かった。すなわち、従来の光ファイバ伝送システムは、
故障時等に備え、信頼性の高いシステムを実現するため
に２倍の設備投資を行なうものであった。一方、たとえ
ば局側光送受信部の信頼性は二重化を必要とする程低く
はなく、ｎ個の局側光送受信部に１個の割合で予備を設
けるｎ＋１予備系で十分その信頼性を保証できる。した
がって従来の光ファイバ伝送システムは、その設備が過
剰に大きくなり、資源を有効に活用していないという欠
点があった。However, in such a conventional technique, it is necessary to prepare two sets of subscriber-side optical transceivers and station-side optical transceivers for each subscriber. That is, the conventional optical fiber transmission system,
In preparation for a failure or the like, the facility investment was doubled in order to realize a highly reliable system. On the other hand, for example, the reliability of the optical transmitter / receiver on the station side is not so low as to require duplication, and the reliability can be sufficiently ensured by an n + 1 spare system in which a spare is provided for every n optical transmitter / receiver on the station side. .. Therefore, the conventional optical fiber transmission system has a drawback that its equipment becomes excessively large and resources are not effectively utilized.
【０００６】本発明はこのような従来技術の欠点を解消
し、ｎ台の局側装置光送受信部を１台の局側装置予備光
送受信部にて冗長することにより、従来に比べ遙に少な
い設備で信頼性の高い光ファイバ伝送システムを提供す
ることを目的とする。The present invention eliminates the drawbacks of the prior art as described above, and redundantly replaces the n optical transmitter / receivers on the station side with one optical spare transmitter / receiver on the station side. It is an object of the present invention to provide a highly reliable optical fiber transmission system with equipment.
【０００７】[0007]
【課題を解決するための手段】本発明は上述の課題を解
決するために、加入者側に配設された加入者側光送受信
手段と、局側に配設された局側光送受信手段とが光ファ
イバで接続され、前記光ファイバを介して情報の伝送を
行う光ファイバ伝送システムでは、局側光送受信手段は
スイッチ手段を介して加入者側光送受信手段に接続さ
れ、スイッチ手段は予備の局側光送受信手段に接続さ
れ、局側光送受信手段のいずれかが故障した場合には、
スイッチ手段は故障した局側光送受信手段を前記予備の
局側光送受信手段に切り換える。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention comprises a subscriber side optical transmitter / receiver arranged on the subscriber side and a station side optical transmitter / receiver arranged on the station side. Is connected by an optical fiber, and in the optical fiber transmission system for transmitting information through the optical fiber, the station side optical transmitting / receiving means is connected to the subscriber side optical transmitting / receiving means via the switching means, and the switching means is a spare. When connected to the station side optical transmitter / receiver and one of the station side optical transmitter / receiver fails,
The switch means switches the failed station side optical transmitter / receiver means to the spare station side optical transmitter / receiver means.
【０００８】[0008]
【作用】本発明によれば、局側光送受信手段が故障した
場合には、スイッチ手段によりこの故障した局側光送受
信手段を切り離し、これに代わって予備の局側光送受信
手段を加入者側光送受信手段に接続し、光信号の情報伝
送を行う。According to the present invention, when the station side optical transmitter / receiver unit fails, the switch unit disconnects the faulty station side optical transmitter / receiver unit and replaces it with a spare station side optical transmitter / receiver unit. It is connected to an optical transmitting / receiving means and carries out information transmission of optical signals.
【０００９】[0009]
【実施例】次に添付図面を参照して本発明による光ファ
イバ伝送システムの実施例を詳細に説明する。Embodiments of the optical fiber transmission system according to the present invention will now be described in detail with reference to the accompanying drawings.
【００１０】図１を参照すると本発明による光ファイバ
伝送システムの一実施例を示すシステム構成図が示され
ている。本実施例における光ファイバ伝送システムは、
同図に示すように２×２光スイッチ１２−１〜１２−ｎ
により構成される光スイッチ１３が局側に配設され、こ
れに加入者側光送受信部１０、局側光送受信部１４が接
続されている。Referring to FIG. 1, there is shown a system configuration diagram showing an embodiment of an optical fiber transmission system according to the present invention. The optical fiber transmission system in this embodiment is
As shown in the figure, 2 × 2 optical switches 12-1 to 12-n
The optical switch 13 configured by is disposed on the station side, and the subscriber side optical transmission / reception unit 10 and the station side optical transmission / reception unit 14 are connected to the optical switch 13.
【００１１】すなわち、回線毎に加入者宅内に配設され
る光信号の送受信を行う加入者側光送受信部１０（１０
−１〜１０−ｎ）はそれぞれ、対応する参照符号の伝送
路光ファイバ１００（１００−１〜１００−ｎ）を介し
て２×２光スイッチ１２（１２−１〜１２−ｎ）に接続
されている。また、２×２光スイッチ１２（１２−１〜
１２−ｎ）は、対応する参照符号の伝送路光ファイバ１
０２（１０２−１〜１０２−ｎ）を介して光信号の送受
信を行う局側光送受信部１４（１４−１〜１４−ｎ）に
接続されている。That is, a subscriber side optical transmitter / receiver 10 (10) for transmitting and receiving an optical signal disposed in the subscriber's house for each line.
-1 to 10-n) are respectively connected to the 2 × 2 optical switch 12 (12-1 to 12-n) via the transmission path optical fibers 100 (100-1 to 100-n) of the corresponding reference symbols. ing. In addition, the 2 × 2 optical switch 12 (12-1 to 12-1
12-n) is the transmission line optical fiber 1 of the corresponding reference numeral.
02 (102-1 to 102-n) is connected to the station side optical transmitter / receiver 14 (14-1 to 14-n) that transmits and receives optical signals.
【００１２】各２×２光スイッチ１２は、伝送路光ファ
イバ１０２を介して接続されている局側光送受信部１４
が故障したときなどに切り換えられる光スイッチであ
り、シリーズに接続されている。すなわち、２×２光ス
イッチ１２−１は２×２光スイッチ１２−２と、２×２
光スイッチ１２−２は２×２光スイッチ１２−３と、２
×２光スイッチ１２−３は２×２光スイッチ１２−４と
接続され、このような接続が光スイッチ１２−ｎまで続
けられる。２×２光スイッチ１２−ｎはまた、伝送路光
ファイバ１１０−ｎを介して予備の局側光送受信部１６
に接続されている。予備の局側光送受信部１６は、局側
光送受信部１４−１〜１４−ｎのいずれかが故障などに
なったときに、これに代わって加入者側光送受信部１０
と光信号の送受信を行う局側光送受信部である。Each 2 × 2 optical switch 12 has a station side optical transmitter / receiver 14 connected through a transmission line optical fiber 102.
It is an optical switch that can be switched when a failure occurs and is connected to the series. That is, the 2 × 2 optical switch 12-1 and the 2 × 2 optical switch 12-2 are
The optical switch 12-2 includes a 2 × 2 optical switch 12-3 and 2
The × 2 optical switch 12-3 is connected to the 2 × 2 optical switch 12-4, and such a connection is continued up to the optical switch 12-n. The 2 × 2 optical switch 12-n also has a spare station side optical transceiver 16 via the transmission line optical fiber 110-n.
It is connected to the. The spare station side optical transmitter / receiver 16 replaces the subscriber side optical transmitter / receiver 10 when any of the station side optical transmitters / receivers 14-1 to 14-n fails.
An optical transmitter / receiver on the station side for transmitting and receiving optical signals.
【００１３】図２には、正常時における２×２光スイッ
チのスイッチングを示した説明図が示されている。２×
２光スイッチ１２は、ポート１（端子１）、ポート２
（端子２）、ポート３（端子３）およびポート４（端子
４）を有し、これらポート間の接続を切り換えることに
よりスイッチングを行う。２×２光スイッチ１２−ｍ
（ｍ＝２〜ｎ）のポート２は加入者側光送受信部１０−
ｍと対応する伝送路光ファイバ１００−ｍにより接続さ
れ、２×２光スイッチ１２−ｍのポート３は伝送路光フ
ァイバ１０２−ｍを介して局側光送受信部１４−ｍと接
続されている。また、局側光送受信部１４−ｍが正常な
場合、ポート２とポート３が光スイッチ内で接続され、
ポート１とポート４が光スイッチ内で接続されている。
また、局側光送受信部１４−ｍ−１に対応する２×２光
スイッチ１２−ｍ−１のポート４と、局側光送受信部１
４−ｍに対応する２×２光スイッチ１２−ｍのポート１
とが光ファイバ１１０−ｍ−１で接続されている。さら
に、ｍ＝ｎの場合には図１に示すように２×２光スイッ
チ１２−ｎのポート４は予備の局側光送受信部１６と光
ファイバ１１０−ｎで接続される。図１には、すべての
局側光送受信部１４の故障なき正常動作状態のシステム
構成が示されている。FIG. 2 is an explanatory diagram showing the switching of the 2 × 2 optical switch under normal conditions. 2x
The two optical switches 12 are port 1 (terminal 1) and port 2
It has (terminal 2), port 3 (terminal 3) and port 4 (terminal 4), and switching is performed by switching the connection between these ports. 2x2 optical switch 12-m
The port 2 of (m = 2 to n) is a subscriber side optical transceiver unit 10-
m is connected by a transmission path optical fiber 100-m, and the port 3 of the 2 × 2 optical switch 12-m is connected to the station side optical transmission / reception unit 14-m via the transmission path optical fiber 102-m. .. When the station side optical transceiver 14-m is normal, port 2 and port 3 are connected in the optical switch,
Port 1 and port 4 are connected in the optical switch.
Also, the port 4 of the 2 × 2 optical switch 12-m-1 corresponding to the station side optical transceiver 14-m-1 and the station side optical transceiver 1
Port 1 of 2x2 optical switch 12-m corresponding to 4-m
And are connected by an optical fiber 110-m-1. Further, when m = n, as shown in FIG. 1, the port 4 of the 2 × 2 optical switch 12-n is connected to the spare optical transmission / reception unit 16 on the station side by the optical fiber 110-n. FIG. 1 shows a system configuration in which all the station-side optical transceivers 14 are in a normal operating state without failure.
【００１４】図３には局側光送受信部１４−３が故障し
たときのシステム構成図が、また図４にはそのスイッチ
ング動作がそれぞれ示されている。同図に示すようにた
とえば局側光送受信部１２−３が故障となった場合、対
応する２×２光スイッチ１２−３のポート１とポート３
を図４に示す様に光スイッチ１２−３内で接続し、ポー
ト２とポート４を光スイッチ１２−３内で接続する。２
×２光スイッチ１２−３をこのように切り換えることに
より、加入者側光送受信部１０−３がシステムから切り
離されるとともに、予備の局側光送受信部１６が加入者
側光送受信部１０−３に接続され通信サービスが行われ
る。このように予備の局側光送受信部１６で一時的に対
応した場合、故障した局側光送受信部１４−３を交換し
た後、２×２光スイッチ１２−３を再び図２に示すよう
に接続する。FIG. 3 is a system configuration diagram when the station side optical transmitter / receiver 14-3 fails, and FIG. 4 shows its switching operation. As shown in the figure, for example, when the station side optical transmitter / receiver 12-3 fails, the corresponding port 1 and port 3 of the 2 × 2 optical switch 12-3 are connected.
Are connected in the optical switch 12-3 as shown in FIG. 4, and the ports 2 and 4 are connected in the optical switch 12-3. Two
By switching the × 2 optical switch 12-3 in this manner, the subscriber side optical transmitter / receiver 10-3 is disconnected from the system, and the spare station side optical transmitter / receiver 16 is replaced by the subscriber side optical transmitter / receiver 10-3. Connected to provide communication service. In this way, in the case where the spare station side optical transmitter / receiver section 16 temporarily responds, after the defective station side optical transmitter / receiver section 14-3 is replaced, the 2 × 2 optical switch 12-3 is again set as shown in FIG. Connecting.
【００１５】図５には、光ファイバ伝送システムの他の
実施例として、２×２光スイッチ１２を含む伝送路１０
０の試験および加入者側光送受信部１０の動作試験を行
う動作試験ユニット２４と、局側伝送路光ファイバ１０
２を含む局側光送受信部１４の動作試験を行う動作試験
ユニット１８とを追加したときのシステム構成が示され
ている。この実施例では、１×２光スイッチ２０を設
け、これにより予備の局側光送受信部１６と試験ユニッ
ト１６の切り換え制御を行っている。１×２光スイッチ
２０は、そのポート１が光ファイバ１１０−ｎを介して
２×２光スイッチ１２−ｎのポート４と接続され、その
ポート２が光ファイバ１１２により予備の局側光送受信
部１６と接続され、そのポート３が光ファイバ１１４を
介し試験ユニット２４と接続されている。また、局側光
送受信部１４−１に対応する２×２光スイッチ１２−１
のポート１には、局側光送受信部動作試験ユニット１８
が光ファイバ１２０により接続されている。FIG. 5 shows a transmission line 10 including a 2 × 2 optical switch 12 as another embodiment of the optical fiber transmission system.
0 and an operation test unit 24 for performing an operation test of the optical transmission / reception unit 10 on the subscriber side, and the optical fiber 10 on the transmission line on the station side.
The system configuration when an operation test unit 18 for performing an operation test of the station side optical transmitter / receiver 14 including 2 is added is shown. In this embodiment, a 1 × 2 optical switch 20 is provided to control switching between the spare station side optical transmitter / receiver 16 and the test unit 16. In the 1 × 2 optical switch 20, its port 1 is connected to the port 4 of the 2 × 2 optical switch 12-n via an optical fiber 110-n, and the port 2 is a spare station side optical transmitter / receiver by an optical fiber 112. 16 and the port 3 thereof is connected to the test unit 24 through the optical fiber 114. In addition, the 2 × 2 optical switch 12-1 corresponding to the station side optical transceiver 14-1
Port side optical transmitter / receiver operation test unit 18
Are connected by an optical fiber 120.
【００１６】たとえば、局側光送受信部１４の動作試験
と、２×２光スイッチ１２を含む伝送路光ファイバ１０
０および加入者側光送受信部１０の動作試験を行う場
合、１×２光スイッチ２０のポート１とポート３を光ス
イッチ２０内で接続する。そして、局側光送受信部１４
−ｍに対応する２×２光スイッチ１２−ｍを順に図６の
ように光スイッチ内接続すれば、局側光送受信部１４−
１〜１４−ｎが局側光送受信部動作試験ユニット１８と
順に接続されて動作試験が行なわれる。また、前述した
ように１×２光スイッチ２０のポート１とポート３が光
スイッチ２０内で接続されているため、試験ユニット２
４が光スイッチ１２−１〜ｎを含む加入者側の伝送路光
ファイバ１００−１〜１−ｎと加入者側光送受信部１０
−１〜１０−ｎとに順次接続されて試験される。これに
より、システム内の線路の接続はずれや断線の有無等
や、加入者側光送受信部１０−１〜１０−ｎの動作の確
認を行うことが可能になる。これは、各々の局側光送受
信部１４と加入者側光送受信部１０との対向における故
障時に、故障部位の発見や、局側光送受信部１４故障時
に交換した局側光送受信部１４の動作試験にも使用でき
る。なお図５には、局側光送受信部１４−４と伝送路光
ファイバ１００−４および加入者側光送受信部１０−４
の動作試験を、試験ユニット１８および２４により行う
ときの接続構成例が示されている。また同実施例におい
て、局側光送受信部１４が故障したときには、図５に示
す１×２光スイッチ２０のポート１とポート２を光スイ
ッチ内接続することで、図３に示したのと同様の冗長構
成をとることができる。For example, an operation test of the station side optical transmitter / receiver 14 and a transmission line optical fiber 10 including a 2 × 2 optical switch 12 are performed.
0 and the subscriber side optical transmitter / receiver 10 are tested for operation, ports 1 and 3 of the 1 × 2 optical switch 20 are connected in the optical switch 20. Then, the station side optical transceiver 14
If the 2 × 2 optical switch 12-m corresponding to −m is sequentially connected in the optical switch as shown in FIG.
1 to 14-n are sequentially connected to the station side optical transmitter / receiver operation test unit 18 to perform an operation test. Further, as described above, since the ports 1 and 3 of the 1 × 2 optical switch 20 are connected in the optical switch 20, the test unit 2
Reference numeral 4 denotes a subscriber side transmission line optical fiber 100-1 to 1-n including the optical switches 12-1 to n, and a subscriber side optical transceiver unit 10.
-1 to 10-n are sequentially connected and tested. As a result, it becomes possible to confirm the disconnection or disconnection of the lines in the system and the operation of the subscriber side optical transceivers 10-1 to 10-n. This is because when a failure occurs between the station-side optical transmitter / receiver unit 14 and the subscriber-side optical transmitter-receiver unit 10 at the time of failure, the failure site is found and the operation of the station-side optical transmitter-receiver unit 14 exchanged at the time of failure Can also be used for testing. In FIG. 5, the station side optical transmitter / receiver 14-4, the transmission line optical fiber 100-4, and the subscriber side optical transmitter / receiver 10-4 are shown.
An example of a connection configuration when the operation test of (1) is performed by the test units 18 and 24 is shown. Further, in the same embodiment, when the station side optical transmitter / receiver 14 is out of order, the ports 1 and 2 of the 1 × 2 optical switch 20 shown in FIG. 5 are connected in the optical switch so that the same as shown in FIG. It is possible to take a redundant configuration of.
【００１７】なお、これら実施例では光スイッチ１３を
２×２光スイッチ１２を複数設けることにより構成した
が、たとえば同様のスイッチングを行える光スイッチで
あれば光スイッチ１３の内部はとくにこれに限定される
ものではない。In these embodiments, the optical switch 13 is constituted by providing a plurality of 2 × 2 optical switches 12, but the inside of the optical switch 13 is particularly limited to this as long as it is an optical switch capable of performing similar switching. Not something.
【００１８】[0018]
【発明の効果】このように本発明の光ファイバ伝送シス
テムによれば、ｎ台の局側光送受信部に対し１台の予備
の局側光送受信部で冗長することができる。このため、
高信頼性を維持するとともに設備を最小限に抑えること
が出来る。また、局側光送受信部の動作試験ユニットま
たは伝送路試験および加入者側光送受信部の動作試験ユ
ニットを設けることにより、局側光送受信部、加入者側
光送受信部および伝送路光ファイバの動作試験などが可
能となる。なお、本実施例では局側光送受信部１台に対
し、加入者側光送受信部１台という構成で説明したが、
加入者側の伝送路に光スイッチ、合分波等の光分岐を配
設して集線しても同様の効果が期待できる。すなわち、
このような光ファイバ伝送システムでも光スイッチを設
けて予備系に切り換えるシステムであれば本発明の範疇
に含まれる。As described above, according to the optical fiber transmission system of the present invention, it is possible to have redundancy for one spare station side optical transmitter / receiver for n station side optical transmitters / receivers. For this reason,
High reliability can be maintained and equipment can be minimized. Also, by providing an operation test unit for the station side optical transceiver or a transmission line test and an operation test unit for the subscriber side optical transceiver, the operation of the station side optical transceiver, the subscriber side optical transceiver and the transmission line optical fiber It is possible to test. In this embodiment, one optical transmitter / receiver unit on the station side is described as one optical transmitter / receiver unit on the subscriber side.
The same effect can be expected by arranging an optical switch, an add / drop multiplexer, or another optical branch on the transmission line on the subscriber side and concentrating the lines. That is,
Such an optical fiber transmission system is also included in the scope of the present invention as long as it is a system that is provided with an optical switch and is switched to the standby system.
【図１】本発明による光ファイバ伝送システムの一実施
例を示すシステム構成図、FIG. 1 is a system configuration diagram showing an embodiment of an optical fiber transmission system according to the present invention,
【図２】図１の実施例において、局側光送受信部が正常
動作のときの光スイッチの接続を示す動作説明図、2 is an operation explanatory view showing the connection of the optical switch when the station side optical transmitter / receiver operates normally in the embodiment of FIG. 1;
【図３】図１の実施例において、第３番目の加入者側光
送受信部が故障したときの接続例を示すシステム構成
図、FIG. 3 is a system configuration diagram showing a connection example when a third subscriber-side optical transmitter / receiver fails in the embodiment of FIG. 1;
【図４】図３に示した状態における光スイッチの接続動
作を示す動作説明図、FIG. 4 is an operation explanatory view showing the connection operation of the optical switch in the state shown in FIG.
【図５】本発明による光ファイバ伝送システムの他の実
施例を示すシステム構成図、FIG. 5 is a system configuration diagram showing another embodiment of the optical fiber transmission system according to the present invention,
【図６】図５に示した実施例における局側光送受信部の
動作試験、伝送路試験、加入者側光送受信部の動作試験
を行う際の光スイッチの接続状態を示した動作説明図、6 is an operation explanatory diagram showing a connection state of optical switches when performing an operation test of an optical transmitter / receiver on a station side, a transmission line test, and an operation test of an optical transmitter / receiver on a subscriber side in the embodiment shown in FIG. 5;
【図７】従来技術における光ファイバ伝送システムのシ
ステム構成図である。FIG. 7 is a system configuration diagram of a conventional optical fiber transmission system.
１０−１〜１０−ｎ 加入者側光送受信部 １２−１〜１２−ｎ ２×２光スイッチ １４−１〜１４−ｎ 局側光送受信部 １６ 予備の局側光送受信部 １８，２４ 動作試験ユニット ２０ １×２光スイッチ 10-1 to 10-n Subscriber side optical transmitter / receiver 12-1 to 12-n 2 × 2 optical switch 14-1 to 14-n Station side optical transmitter / receiver 16 Spare station side optical transmitter / receiver 18, 24 Operation test Unit 20 1 × 2 optical switch
Claims (4)
手段と、局側に配設された局側光送受信手段とが光ファ
イバで接続され、前記光ファイバを介して情報の伝送を
行う光ファイバ伝送システムにおいて、 前記局側光送受信手段はスイッチ手段を介して前記加入
者側光送受信手段に接続され、 前記スイッチ手段は、予備の局側光送受信手段に接続さ
れ、前記局側光送受信手段のいずれかが故障した場合に
は、故障した局側光送受信手段を前記予備の局側光送受
信手段に切り換えることを特徴とする光ファイバ伝送シ
ステム。1. A subscriber side optical transmitting / receiving means arranged on the subscriber side and a station side optical transmitting / receiving means arranged on the station side are connected by an optical fiber, and information is transmitted through the optical fiber. In the optical fiber transmission system, the station side optical transmitter / receiver unit is connected to the subscriber side optical transmitter / receiver unit via a switch unit, and the switch unit is connected to a spare station side optical transmitter / receiver unit. An optical fiber transmission system characterized in that, when any one of the optical transmitting / receiving means fails, the defective station side optical transmitting / receiving means is switched to the spare station side optical transmitting / receiving means.
手段と、局側に配設された局側光送受信手段とが光ファ
イバで接続され、前記光ファイバを介して情報の伝送を
行う光ファイバ伝送システムにおいて、 前記局側には、第１の端子、第２の端子、第３の端子お
よび第４の端子を有する２×２スイッチ手段が前記局側
に複数配設され、 前記２×２スイッチ手段はそれぞれ、第２の端子が前記
加入者側光送受信手段側に、第３の端子が前記局側光送
受信手段側に接続されるとともに、第１の端子が隣接す
る前記２×２スイッチ手段の第４の端子に、第４の端子
が隣接する前記２×２スイッチ手段の第４の端子に互い
に接続されることにより、複数の前記２×２スイッチ手
段がシリーズに接続され、 前記２×２スイッチ手段のいずれか１つは第１の端子お
よび第４の端子のいずれかに予備の局側光送受信手段が
接続され、 前記局側光送受信手段のいずれかが故障した場合、この
局側光送受信手段に係わる前記２×２スイッチ手段は、
第２の端子と前記予備の局側光送受信手段が接続されて
いる端子番号と同じ番号の端子とを接続すことにより前
記予備の局側光送受信手段に切り換えることを特徴とす
る光ファイバ伝送システム。2. A subscriber side optical transmitter / receiver arranged on the subscriber side and a station side optical transmitter / receiver arranged on the station side are connected by an optical fiber, and information is transmitted through the optical fiber. In the optical fiber transmission system for performing the above, a plurality of 2 × 2 switch means having a first terminal, a second terminal, a third terminal and a fourth terminal are arranged on the station side, In each of the 2 × 2 switch means, a second terminal is connected to the subscriber side optical transmitter / receiver side, a third terminal is connected to the station side optical transmitter / receiver side, and a first terminal is adjacent to each other. A plurality of 2 × 2 switch means are connected in series by connecting the fourth terminal of the 2 × 2 switch means to the fourth terminal of the adjacent 2 × 2 switch means. And one of the 2 × 2 switch means is the first If a spare station side optical transmitter / receiver is connected to either the terminal or the fourth terminal and any of the station side optical transmitter / receiver fails, the 2 × 2 switch means related to the station side optical transmitter / receiver is ,
An optical fiber transmission system characterized by switching to the spare station-side optical transceiver means by connecting a second terminal and a terminal having the same number as the terminal number to which the spare station-side optical transceiver means is connected. ..
ムにおいて、このシステムの局側は前記２×２光スイッ
チ手段を含む伝送路試験および加入者側光送受信手段の
動作試験を行う第１の試験手段を有し、 第１の試験手段は前記予備の局側光送受信手段とともに
１×２スイッチ手段を介して前記２×２スイッチ手段に
接続され、 前記動作試験を行う際、前記１×２スイッチ手段を第１
の試験手段側に接続し、前記２×２スイッチ手段を制御
して試験対象となる前記２×２光スイッチ手段を含む伝
送路および加入者側光送受信手段を第１の試験手段と接
続することにより、これらの試験を行うことを特徴とす
る光ファイバ伝送システム。3. The optical fiber transmission system according to claim 2, wherein the station side of the system performs a transmission line test including the 2 × 2 optical switch means and an operation test of the subscriber side optical transmission / reception means. The test means has a test means, and the first test means is connected to the 2 × 2 switch means via the 1 × 2 switch means together with the spare station side optical transmitter / receiver means, and when performing the operation test, the 1 × 2 Switch means first
Of the 2 × 2 switch means and the transmission line including the 2 × 2 optical switch means to be tested and the optical transmission / reception means on the subscriber side are connected to the first test means. An optical fiber transmission system characterized by performing these tests.
ムにおいて、このシステムの局側は前記局側光送受信手
段の動作試験を行う第２の試験手段を有し、 第２の試験手段は前記２×２光スイッチ手段における第
１の端子および第４の端子のいずれか未接続の端子に接
続され、 前記伝送路試験および加入者側光送受信部の動作試験時
に、第２の試験手段が前記局側光送受信手段と接続さ
れ、この局側光送受信手段の動作試験が行われることを
特徴とする光ファイバ伝送システム。4. The optical fiber transmission system according to claim 3, wherein a station side of the system has a second test means for performing an operation test of the station side optical transmitting / receiving means, and the second test means is the It is connected to either the first terminal or the fourth terminal of the 2 × 2 optical switch means, which is not connected, and the second test means is connected to the second test means during the transmission line test and the operation test of the subscriber side optical transceiver. An optical fiber transmission system, characterized in that the optical fiber transmission system is connected to a station side optical transmitter / receiver and an operation test of the station side optical transmitter / receiver is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29743991A JP2977344B2 (en) | 1991-11-13 | 1991-11-13 | Optical fiber transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29743991A JP2977344B2 (en) | 1991-11-13 | 1991-11-13 | Optical fiber transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05136733A true JPH05136733A (en) | 1993-06-01 |
| JP2977344B2 JP2977344B2 (en) | 1999-11-15 |
Family
ID=17846539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29743991A Expired - Fee Related JP2977344B2 (en) | 1991-11-13 | 1991-11-13 | Optical fiber transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2977344B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008054278A (en) * | 2006-07-26 | 2008-03-06 | Nec Corp | Pon system, station side device and redundant method used therefor |
| US7835268B2 (en) | 2005-07-29 | 2010-11-16 | Kddi Corporation | Optical termination system |
-
1991
- 1991-11-13 JP JP29743991A patent/JP2977344B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7835268B2 (en) | 2005-07-29 | 2010-11-16 | Kddi Corporation | Optical termination system |
| JP2008054278A (en) * | 2006-07-26 | 2008-03-06 | Nec Corp | Pon system, station side device and redundant method used therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2977344B2 (en) | 1999-11-15 |
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