JPH04284752A - Order wire system of ring constitution - Google Patents

Order wire system of ring constitution

Info

Publication number
JPH04284752A
JPH04284752A JP4856791A JP4856791A JPH04284752A JP H04284752 A JPH04284752 A JP H04284752A JP 4856791 A JP4856791 A JP 4856791A JP 4856791 A JP4856791 A JP 4856791A JP H04284752 A JPH04284752 A JP H04284752A
Authority
JP
Japan
Prior art keywords
drop
signal
ring
constitution
station
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.)
Withdrawn
Application number
JP4856791A
Other languages
Japanese (ja)
Inventor
Toshiaki Asai
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 JP4856791A priority Critical patent/JPH04284752A/en
Publication of JPH04284752A publication Critical patent/JPH04284752A/en
Withdrawn legal-status Critical Current

Links

Abstract

PURPOSE: To enable the order wire to be used even in the case of optical fiber interruption by providing a howling prevention section caused between a signal sent from an ad-drop device of the present station and a signal circulated through a ring on the ad-drop device.
CONSTITUTION: The system is provided with ad-drop devices 100-1-100-n to insert/separate a signal to each station. The ad-drop devices are interconnected in a ring by a transmission line. Through the constitution above, the signal is sent/received among the ad-drop devices. A howling prevention section (350-1-350-n) is respectively provided on each of the ad-drop devices 100-1-100-n to prevent howling caused between the signal sent from the ad-drop device of the present station and a signal circulated through the ring. Furthermore, when the transmission line is formed by 1st and 2nd lines, even when one line is interrupted, the other line is used to continue the communication.
COPYRIGHT: (C)1992,JPO&Japio
JP4856791A 1991-03-14 1991-03-14 Order wire system of ring constitution Withdrawn JPH04284752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4856791A JPH04284752A (en) 1991-03-14 1991-03-14 Order wire system of ring constitution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4856791A JPH04284752A (en) 1991-03-14 1991-03-14 Order wire system of ring constitution

Publications (1)

Publication Number Publication Date
JPH04284752A true JPH04284752A (en) 1992-10-09

Family

ID=12806976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4856791A Withdrawn JPH04284752A (en) 1991-03-14 1991-03-14 Order wire system of ring constitution

Country Status (1)

Country Link
JP (1) JPH04284752A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548632A (en) * 1991-08-20 1993-02-26 Nec Corp Order wire signal transmitter
JPH05167599A (en) * 1991-12-17 1993-07-02 Nec Corp Order wire control system in synchronizing network ring lan system
EP0887961A2 (en) * 1997-06-26 1998-12-30 Nortel Networks Corporation Testing of routing integrity in a wired network
JP2007067760A (en) * 2005-08-31 2007-03-15 Nippon Telegr & Teleph Corp <Ntt> Optical branching and inserting switch

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548632A (en) * 1991-08-20 1993-02-26 Nec Corp Order wire signal transmitter
JPH05167599A (en) * 1991-12-17 1993-07-02 Nec Corp Order wire control system in synchronizing network ring lan system
EP0887961A2 (en) * 1997-06-26 1998-12-30 Nortel Networks Corporation Testing of routing integrity in a wired network
EP0887961A3 (en) * 1997-06-26 2002-04-24 Nortel Networks Limited Testing of routing integrity in a wired network
JP2007067760A (en) * 2005-08-31 2007-03-15 Nippon Telegr & Teleph Corp <Ntt> Optical branching and inserting switch
JP4599614B2 (en) * 2005-08-31 2010-12-15 日本電信電話株式会社 Optical add / drop switch

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19980514