JPH02271726A - Protection system - Google Patents
Protection systemInfo
- Publication number
- JPH02271726A JPH02271726A JP1093449A JP9344989A JPH02271726A JP H02271726 A JPH02271726 A JP H02271726A JP 1093449 A JP1093449 A JP 1093449A JP 9344989 A JP9344989 A JP 9344989A JP H02271726 A JPH02271726 A JP H02271726A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- signal
- electrical
- output
- switch
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光通信装置の通信方式に関し、特に光結合器と
光分岐器を用いたプロテクションシステムに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication method for an optical communication device, and particularly to a protection system using an optical coupler and an optical splitter.
従来、この種のプロテクションシステムは、伝送路まで
含めて１対のファイバケーブルを用いた２重化方式とな
っているので、一方向当り２本のファイバケーブルが必
要となっている。Conventionally, this type of protection system has a duplex system using a pair of fiber cables including the transmission line, so two fiber cables are required for each direction.
上述したプロテクション方式は、伝送路を含めた２重化
方式を採用しているため、特に局内伝送又は短距離伝送
などのように伝送路の信頼度が確保出来る様なシステム
の場合にはファイバケーブルのコスト・ケーブル布設コ
ストの面から、システムのコストが割高になるという欠
点がある。The above-mentioned protection method uses a redundant method that includes the transmission line, so fiber cables are especially suitable for systems where the reliability of the transmission line can be ensured, such as intra-office transmission or short-distance transmission. The disadvantage is that the system cost is relatively high in terms of the cost of cable installation and the cost of installing cables.
本発明のプロテクションシステムは、送信側ニ入力電気
信号を二つの電気−光変換回路のうちどちらか一方に接
続する切替スイッチに接続された方の光出力信号のみを
出力する光出力遮断制御機能をもつ２重化された電気−
光変換回路と、２重化された電気−光変換回路のそれぞ
れの光出力を光結合する光結合器とを有し、受信側に１
本の光伝送路で光結合器と結ばれた光分岐器と、光分岐
器により２分岐された受信光信号を入力とする光−電気
変換回路と、それぞれの光−電気変換回路の出力信号の
うちどちらか一方を選択する切替スイッチとを有してい
る。The protection system of the present invention has an optical output cutoff control function that outputs only the optical output signal connected to the changeover switch that connects the input electric signal on the transmitting side to one of the two electric-to-optical conversion circuits. Dual electricity with
It has an optical conversion circuit and an optical coupler that optically couples the respective optical outputs of the duplicated electric-optical conversion circuits, and one on the receiving side.
An optical splitter connected to the optical coupler through a main optical transmission line, an optical-to-electrical conversion circuit that inputs the received optical signal split into two by the optical splitter, and an output signal from each optical-to-electrical conversion circuit. It has a changeover switch for selecting one of them.
次に本発明の実施例について図面を参照して説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１図において、入力信号１０はスイッチ２０により電
気−光変換回路５０と６０のいずれかに供給される。電
気−光変換回路５０又は６０は制御信号３０又は４０に
より、それぞれ光出力が遮断制御がされる。制御信号３
０と４０はスイッチ２０と連動されておりスイッチ２０
によって選択されている系の電気−光変換回路の光信号
を出力する。光結合器７０は電気−光変換回路５０と６
０の光出力を結合するものであり、実際には制御信号３
０又は４０により、電気−光変換回路５０又は６０の光
出力は遮断されるので、光結合器７０はスイッチ２０で
選択されている方の光信号を出力する。受信側では光伝
送路を通して送られてくる光信号を光分岐器９０により
、光−電気変換回路１００と１１０の両方に分配する。In FIG. 1, input signal 10 is applied by switch 20 to either electrical-to-optical conversion circuit 50 or 60. In FIG. The light output of the electrical-optical conversion circuit 50 or 60 is controlled to be cut off by the control signal 30 or 40, respectively. Control signal 3
0 and 40 are linked with switch 20, and switch 20
The optical signal of the electrical-to-optical conversion circuit of the system selected by is output. The optical coupler 70 connects the electrical-to-optical conversion circuits 50 and 6.
It combines the optical output of 0, and actually the control signal 3
0 or 40, the optical output of the electro-optical conversion circuit 50 or 60 is cut off, so the optical coupler 70 outputs the optical signal selected by the switch 20. On the receiving side, an optical splitter 90 distributes the optical signal sent through the optical transmission line to both optical-to-electrical conversion circuits 100 and 110.
スイッチ１２０は光−電気変換回路１００と１１０とで
、変換された電気信号のうち、一方を選択し、出力信号
１３０として出力する。The switch 120 selects one of the electrical signals converted by the optical-to-electrical conversion circuits 100 and 110 and outputs it as an output signal 130.
以上説明した様に本発明は、伝送路の信頼度が確保出来
る局内伝送用又は短距離伝送用の光通信システムに対し
て、光結合器と光分岐器を使うことにより、装置側に冗
長性を持たせながら、１本のファイバケーブルで、プロ
テクションシステムが可能となるので、構成システムの
トータルコストを低減出来るという効果がある。As explained above, the present invention provides redundancy on the equipment side by using an optical coupler and an optical splitter for optical communication systems for intra-office transmission or short-distance transmission that can ensure the reliability of the transmission path. Since it is possible to create a protection system with a single fiber cable while having the same characteristics, it has the effect of reducing the total cost of the constituent system.
第１図は本発明の実施例を示すブロック図である。
１０・・・・・・入力信号、２０，１２０・・・・・・
スイッチ、５０．６０・・・・・・電気−光変換回路、
３０．４０・・・・・・制御信号、７０・・・・・・光
結合器、８０・・・・・・光伝送路、９０・・・・・・
光分岐器、１００，１１Ｏ・・・・・・光−電気変換回
路、１３０・・・・・・出力信号。
代理人 弁理士 内 原 晋FIG. 1 is a block diagram showing an embodiment of the present invention. 10...Input signal, 20,120...
switch, 50.60... electrical-optical conversion circuit,
30.40... Control signal, 70... Optical coupler, 80... Optical transmission line, 90...
Optical splitter, 100, 11O... Optical-electric conversion circuit, 130... Output signal. Agent Patent Attorney Susumu Uchihara
Claims (1)
に入力電気信号を二つの電気−光変換回路のうちどちら
か一方に接続する切替スイッチ接続され、接続された方
の光出力信号のみを出力する光出力遮断制御機能をもつ
二重化された電気−光変換回路と、二重化された電気−
光変換回路のそれぞれの光出力を結合する光結合器とを
備え、受信側に一本の光伝送路で光結合器と結ばれた光
分岐器と、光分岐器により二分岐された受信光信号を入
力とする光−電気変換回路と、それぞれの光−電気変換
回路の出力信号のうちどちらか一方の出力信号を選択す
る切替スイッチとを備えることを特徴とするプロテクシ
ョンシステム。In a protection system for optical communication equipment, a switch is connected to the transmission side to connect an input electrical signal to one of two electrical-to-optical conversion circuits, and an optical output cutoff that outputs only the optical output signal of the connected one. A redundant electrical-to-optical conversion circuit with control functions and a redundant electrical-optical conversion circuit
It is equipped with an optical coupler that combines the respective optical outputs of the optical conversion circuit, and an optical splitter that is connected to the optical coupler through a single optical transmission line on the receiving side, and a received light that is split into two by the optical splitter. 1. A protection system comprising an optical-to-electrical conversion circuit that receives a signal as an input, and a changeover switch that selects one of the output signals of each of the optical-to-electrical conversion circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1093449A JPH02271726A (en) | 1989-04-12 | 1989-04-12 | Protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1093449A JPH02271726A (en) | 1989-04-12 | 1989-04-12 | Protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02271726A true JPH02271726A (en) | 1990-11-06 |
Family
ID=14082636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1093449A Pending JPH02271726A (en) | 1989-04-12 | 1989-04-12 | Protection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02271726A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5972833A (en) * | 1982-10-19 | 1984-04-24 | Mitsubishi Electric Corp | Optical transmitter |
-
1989
- 1989-04-12 JP JP1093449A patent/JPH02271726A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5972833A (en) * | 1982-10-19 | 1984-04-24 | Mitsubishi Electric Corp | Optical transmitter |
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