WO1997025829A3 - System and method for photonic facility and line protection switching - Google Patents
System and method for photonic facility and line protection switching Download PDFInfo
- Publication number
- WO1997025829A3 WO1997025829A3 PCT/US1996/019919 US9619919W WO9725829A3 WO 1997025829 A3 WO1997025829 A3 WO 1997025829A3 US 9619919 W US9619919 W US 9619919W WO 9725829 A3 WO9725829 A3 WO 9725829A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- controller
- protection switching
- line protection
- photonic
- facility
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0287—Protection in WDM systems
- H04J14/0297—Optical equipment protection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0287—Protection in WDM systems
- H04J14/0289—Optical multiplex section protection
- H04J14/0291—Shared protection at the optical multiplex section (1:1, n:m)
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0287—Protection in WDM systems
- H04J14/0293—Optical channel protection
- H04J14/0295—Shared protection at the optical channel (1:1, n:m)
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0278—WDM optical network architectures
- H04J14/0279—WDM point-to-point architectures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0009—Construction using wavelength filters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0011—Construction using wavelength conversion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0037—Operation
- H04Q2011/0043—Fault tolerance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0052—Interconnection of switches
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96945606A EP0870412A2 (en) | 1995-12-22 | 1996-12-23 | System and method for photonic facility and line protection switching |
JP09525209A JP2000503192A (en) | 1995-12-22 | 1996-12-23 | Optical function and line protection exchange connection system and method |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/577,663 | 1995-12-22 | ||
US08/577,663 US5731887A (en) | 1995-12-22 | 1995-12-22 | System and method for photonic facility and line protection switching |
US08/672,808 US5777761A (en) | 1995-12-22 | 1996-06-28 | System and method for photonic facility and line protection switching using wavelength translation |
US08/672,808 | 1996-06-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1997025829A2 WO1997025829A2 (en) | 1997-07-17 |
WO1997025829A3 true WO1997025829A3 (en) | 1997-10-23 |
Family
ID=27077307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/019919 WO1997025829A2 (en) | 1995-12-22 | 1996-12-23 | System and method for photonic facility and line protection switching |
Country Status (6)
Country | Link |
---|---|
US (1) | US5777761A (en) |
EP (1) | EP0870412A2 (en) |
JP (1) | JP2000503192A (en) |
CA (1) | CA2241106A1 (en) |
MX (1) | MX9805051A (en) |
WO (1) | WO1997025829A2 (en) |
Families Citing this family (84)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6483803B1 (en) * | 1996-09-04 | 2002-11-19 | Nortel Networks Limited | Apparatus and method for restoring fiber optic communications network connections |
US6115155A (en) * | 1996-10-29 | 2000-09-05 | Chorum Technologies Inc. | System for dealing with faults in an optical link |
US5991312A (en) * | 1997-11-03 | 1999-11-23 | Carrier Access Corporation | Telecommunications multiplexer |
US6057948A (en) * | 1997-11-03 | 2000-05-02 | Ciena Corporation | Protection switch optical communications system |
US6154296A (en) * | 1997-11-05 | 2000-11-28 | Northern Telecom Limited | Telecommunications network having shared protect capacity architecture |
US6061482A (en) * | 1997-12-10 | 2000-05-09 | Mci Communications Corporation | Channel layered optical cross-connect restoration system |
US6233072B1 (en) * | 1997-12-31 | 2001-05-15 | Mci Communications Corporation | Method and system for restoring coincident line and facility failures |
US6049641A (en) * | 1998-02-24 | 2000-04-11 | Gemfire Corporation | Connection system for optical redundancy |
US6288813B1 (en) * | 1998-03-25 | 2001-09-11 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus and method for effecting data transfer between data systems |
US6334010B1 (en) * | 1998-04-21 | 2001-12-25 | Alcatel | Protected optical switching matrix |
US7130540B2 (en) * | 1998-07-21 | 2006-10-31 | Corvis Corporation | Optical transmission systems, devices, and methods |
US6721508B1 (en) | 1998-12-14 | 2004-04-13 | Tellabs Operations Inc. | Optical line terminal arrangement, apparatus and methods |
JP3605629B2 (en) * | 1998-12-15 | 2004-12-22 | 富士通株式会社 | Light source redundancy switching method and wavelength division multiplex transmission apparatus by the method |
US7293090B1 (en) | 1999-01-15 | 2007-11-06 | Cisco Technology, Inc. | Resource management protocol for a configurable network router |
US6856627B2 (en) * | 1999-01-15 | 2005-02-15 | Cisco Technology, Inc. | Method for routing information over a network |
US6724757B1 (en) * | 1999-01-15 | 2004-04-20 | Cisco Technology, Inc. | Configurable network router |
US6982974B1 (en) | 1999-01-15 | 2006-01-03 | Cisco Technology, Inc. | Method and apparatus for a rearrangeably non-blocking switching matrix |
US6934305B1 (en) | 1999-01-15 | 2005-08-23 | Cisco Technology, Inc. | Method and apparatus for detecting errors in a backplane frame |
JP3531526B2 (en) * | 1999-05-13 | 2004-05-31 | 日本電気株式会社 | Communications system |
GB2350001B (en) * | 1999-05-13 | 2004-06-09 | Fujitsu Ltd | Optical networks |
US6282169B1 (en) * | 1999-06-11 | 2001-08-28 | Amplify.Net Inc. | Serial redundant bypass control mechanism for maintaining network bandwidth management service |
FR2795577B1 (en) * | 1999-06-28 | 2003-06-20 | Cit Alcatel | DISTRIBUTOR OF OPTICAL LINES |
US6973267B1 (en) | 1999-07-01 | 2005-12-06 | Cisco Technology, Inc. | Autoprotected optical communication ring network |
US6735392B1 (en) * | 1999-10-18 | 2004-05-11 | Nortel Networks Limited | System and method for transmitting and restoring an optical signal |
US6587974B1 (en) * | 1999-11-19 | 2003-07-01 | Tyco Telecommunications (Us) Inc. | Method for fault detection and fast protection switching in transmission systems |
US7031607B1 (en) | 2000-02-21 | 2006-04-18 | Nortel Networks Limited | MPLS application to optical cross-connect using wavelength as a label |
US20010046074A1 (en) * | 2000-05-25 | 2001-11-29 | Sunao Kakizaki | Protection switching apparatus for 1 + 1 optical transmission lines |
EP1161014A1 (en) * | 2000-05-31 | 2001-12-05 | PIRELLI CAVI E SISTEMI S.p.A. | Autoprotected optical communication ring network |
JP4046462B2 (en) * | 2000-07-12 | 2008-02-13 | 沖電気工業株式会社 | WDM transmission system |
US20030142678A1 (en) * | 2000-07-28 | 2003-07-31 | Chan Eric L. | Virtual path ring protection method and apparatus |
CA2423115A1 (en) * | 2000-08-25 | 2002-02-28 | Corvis Corporation | Optical transmission systems including optical protection systems, apparatuses, and methods |
US6882799B1 (en) * | 2000-09-28 | 2005-04-19 | Nortel Networks Limited | Multi-grained network |
DE10104704A1 (en) * | 2001-02-02 | 2002-09-26 | Siemens Ag | Method and electro-optical circuit arrangement for line protection in a WDM data transmission link |
US20020105696A1 (en) * | 2001-02-07 | 2002-08-08 | Ross Halgren | Transparent optical-electronic-optical switch |
US20020191244A1 (en) * | 2001-04-06 | 2002-12-19 | Roman Antosik | Disjoint shared protection |
US7272307B2 (en) * | 2001-05-25 | 2007-09-18 | Tellabs Operations, Inc. | Virtual protection channel for fiber optic ring network |
US20020186430A1 (en) * | 2001-06-12 | 2002-12-12 | Ross Halgren | Communications network |
US7831151B2 (en) * | 2001-06-29 | 2010-11-09 | John Trezza | Redundant optical device array |
US20030043429A1 (en) * | 2001-08-28 | 2003-03-06 | Ken Dumble | High capacity backbone |
WO2003021858A1 (en) * | 2001-09-04 | 2003-03-13 | Rumi Sheryar Gonda | Method for supporting sdh/sonet aps on ethernet |
US7187865B2 (en) * | 2001-11-13 | 2007-03-06 | Nortel Networks Limited | Hybrid photonic/electronic switching in a multi-channel network |
US6980736B1 (en) | 2002-01-03 | 2005-12-27 | Mci, Inc. | Verification of path integrity in optical switch network |
JP3851836B2 (en) * | 2002-04-19 | 2006-11-29 | 富士通株式会社 | Wavelength multiplexing transmission system and wavelength multiplexing transmission apparatus |
US7072584B1 (en) * | 2002-04-22 | 2006-07-04 | Atrica Israel Ltd. | Network hub employing 1:N optical protection |
JP4035714B2 (en) * | 2002-07-18 | 2008-01-23 | 日本電気株式会社 | Communication node and switch device |
AU2003256690A1 (en) * | 2002-07-24 | 2004-02-09 | Ciena Corporation | Method and system for providing protection in an optical communication network |
US7426346B2 (en) * | 2002-08-01 | 2008-09-16 | Finisar Corporation | System and method for preventing signal loss in an optical communications network |
US7212738B1 (en) * | 2002-08-01 | 2007-05-01 | Finisar Corporation | Preventing signal loss in an optical communications network |
US7662257B2 (en) * | 2005-04-21 | 2010-02-16 | Georgia-Pacific Consumer Products Llc | Multi-ply paper towel with absorbent core |
US7233738B2 (en) * | 2003-02-18 | 2007-06-19 | Tyco Telecommunications (Us) Inc. | Protection switching architecture and method of use |
US7436824B2 (en) * | 2004-02-17 | 2008-10-14 | Silicon Laboratories Inc. | Distributed switch architecture including a growth input/output bus structure |
US7848644B2 (en) * | 2004-02-23 | 2010-12-07 | Dynamic Method Enterprises Limited | Method and an apparatus to provide optical equipment protection |
US20090034965A1 (en) * | 2004-02-23 | 2009-02-05 | Look Christopher M | Method and an apparatus to automatically verify connectivity within an optical network node |
US20050191052A1 (en) * | 2004-02-26 | 2005-09-01 | Karl Schrodinger | Optical emission module |
US7532817B1 (en) * | 2004-06-29 | 2009-05-12 | Lightech Fiberoptics, Inc. | Fiber optic link protection apparatus |
JP2006042155A (en) * | 2004-07-29 | 2006-02-09 | Fujitsu Ltd | Optical wavelength division multiplex transmission apparatus with redundant constitution, and method for controlling wavelength of reserve system optical output |
EP1653641B1 (en) * | 2004-10-29 | 2010-12-15 | Alcatel Lucent | Optical access node |
GB2419758B (en) * | 2004-10-29 | 2009-08-12 | Agilent Technologies Inc | Optical transmitter |
US20060133804A1 (en) * | 2004-12-17 | 2006-06-22 | Tellabs Operations, Inc. | Method and apparatus for protecting optical signals within a wavelength division multiplexed environment |
JP4638754B2 (en) * | 2005-03-18 | 2011-02-23 | 富士通株式会社 | Optical device and optical cross-connect device |
CN100488071C (en) | 2006-10-27 | 2009-05-13 | 华为技术有限公司 | Method for protecting photoelectric integrated device and photoelectric integrated device |
IL184534A0 (en) * | 2007-07-11 | 2008-06-05 | Eci Telecom Ltd | Method for securing transmission of data along an optical communication line |
TWI351831B (en) * | 2007-09-19 | 2011-11-01 | Ind Tech Res Inst | Self-healing ring-based passive optical network sy |
US8693864B2 (en) * | 2008-10-15 | 2014-04-08 | Mitsubishi Electric Corporation | Optical network system, optical redundant switching apparatus, and WDM apparatus |
US8798454B2 (en) * | 2010-06-28 | 2014-08-05 | Fujitsu Limited | Method and system for automatic lane negotiation in an optical network |
US20120082448A1 (en) * | 2010-09-30 | 2012-04-05 | Fujitsu Limited | System and method for sparing channels of a multi-wavelength transponder |
EP2648350B1 (en) * | 2010-11-29 | 2018-12-05 | Mitsubishi Electric Corporation | Wavelength-multiplexed optical transport system, transmitter device and receiver device |
JP5842428B2 (en) * | 2011-07-21 | 2016-01-13 | 富士通株式会社 | Optical network and optical connection method |
MY166165A (en) * | 2012-04-06 | 2018-06-07 | Telekom Malaysia Berhad | Improved broadband optical communication network having optical channel protection apparatus |
US8953936B2 (en) * | 2012-10-01 | 2015-02-10 | Telefonaktiebolaget L M Ericsson (Publ) | Method for protection of multi-wavelength passive optical network |
US9496951B2 (en) * | 2013-08-08 | 2016-11-15 | Mark E. Boduch | Method and apparatus for performing path protection for rate-adaptive optics |
US9118411B1 (en) * | 2013-09-30 | 2015-08-25 | Juniper Networks, Inc. | Method and apparatus for detection and correction of channel failure in an optical transceiver system |
WO2016210362A1 (en) * | 2015-06-25 | 2016-12-29 | Kaiam Corp. | Optical interconnect for switch applications |
JP6648437B2 (en) * | 2015-07-29 | 2020-02-14 | 富士通株式会社 | Transmission / reception system, transmission device, reception device, and transmission / reception system control method |
US9882633B2 (en) | 2015-09-30 | 2018-01-30 | Juniper Networks, Inc. | Methods and apparatus for self healing of an optical transceiver in a wavelength division multiplexing (WDM) system |
US10020908B2 (en) | 2015-09-30 | 2018-07-10 | Juniper Networks, Inc. | Methods and apparatus for remote management of an optical transceiver system |
JP7035548B2 (en) * | 2018-01-18 | 2022-03-15 | 富士通株式会社 | Transmission system and transmission method |
CN108494475B (en) * | 2018-03-09 | 2020-01-10 | 苏州大学 | Setting and working method of redundant path in quantum communication network |
US10623090B2 (en) * | 2018-05-24 | 2020-04-14 | At&T Intellectual Property I, L.P. | Multi-lane optical transport network recovery |
EP4037205A4 (en) * | 2019-09-27 | 2022-11-30 | NEC Corporation | Optical communication system, optical communication device, optical communication method, and storage medium |
US10979144B1 (en) * | 2019-10-15 | 2021-04-13 | Level 3 Communications, Llc | Optical domain controller of a telecommunications network |
US20230308174A1 (en) * | 2020-08-24 | 2023-09-28 | Nippon Telegraph And Telephone Corporation | Optical communication system and protection method for optical communication system |
US11323178B1 (en) * | 2021-01-19 | 2022-05-03 | Charter Communications Operating, Llc | Transport control based on layer 1 channel characteristics |
US11528078B1 (en) * | 2021-05-27 | 2022-12-13 | Ciena Corporation | Reordering a list of restoration paths based on retuning penalties |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2233851A (en) * | 1989-05-12 | 1991-01-16 | Plessey Telecomm | Optical transmission apparatus |
EP0507379A1 (en) * | 1991-04-02 | 1992-10-07 | ALCATEL BELL Naamloze Vennootschap | Protection arrangement for an optical transmitter/receiver device |
EP0620694A2 (en) * | 1993-04-16 | 1994-10-19 | Nec Corporation | Optical cross-connect system with space and wavelength division switching stages |
Family Cites Families (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451916A (en) * | 1980-05-12 | 1984-05-29 | Harris Corporation | Repeatered, multi-channel fiber optic communication network having fault isolation system |
US4831662A (en) * | 1981-07-29 | 1989-05-16 | Optical Communications Corp. | Fiber optic data transmitting system |
GB2107147B (en) * | 1981-09-03 | 1985-07-10 | Standard Telephones Cables Ltd | Optical requency modulation system |
FI74371C (en) * | 1982-06-04 | 1988-01-11 | British Telecomm | Optical transmission. |
US4596982A (en) * | 1983-02-14 | 1986-06-24 | Prime Computer, Inc. | Reconfigurable ring communications network |
US4527270A (en) * | 1983-05-04 | 1985-07-02 | Allen-Bradley Company | Communications network with stations that detect and automatically bypass faults |
JPH0614643B2 (en) * | 1983-12-05 | 1994-02-23 | 株式会社日立製作所 | Failure recovery detection method for loop data transmission system |
US4542502A (en) * | 1983-12-30 | 1985-09-17 | At&T Bell Laboratories | Reconfigurable collision avoiding system, station and protocol for a two path multiple access digital communications system |
GB2172175B (en) * | 1985-02-15 | 1989-04-05 | Hitachi Ltd | Method for controlling ring network |
US4701907C1 (en) * | 1986-02-03 | 2002-08-27 | Collins Mary | Dynamically reconfigurable time-space-time digital switch and network |
US4768190A (en) * | 1986-04-30 | 1988-08-30 | Og Corporation | Packet switching network |
US4745597A (en) * | 1986-05-14 | 1988-05-17 | Doug Morgan | Reconfigurable local area network |
US4821255A (en) * | 1987-05-06 | 1989-04-11 | Bell Communications Research, Inc. | Cross-connection of wavelength-division-multiplexed high speed optical channels |
US4866699A (en) * | 1987-06-22 | 1989-09-12 | Bell Communications Research, Inc. | Optical telecommunications system using code division multiple access |
JP2533550B2 (en) * | 1987-07-10 | 1996-09-11 | 株式会社日立製作所 | Configuration control method in data communication network |
CA1291549C (en) * | 1987-11-06 | 1991-10-29 | Wayne D. Grover | Method and apparatus for self-healing and self-provisioning networks |
US4845736A (en) * | 1988-04-19 | 1989-07-04 | Pacific Bell | Cross-connect switch and method for providing test access thereto |
GB2222055B (en) * | 1988-08-16 | 1992-10-28 | Plessey Telecomm | Telecommunications transmission security arrangement |
FR2640447B1 (en) * | 1988-12-12 | 1991-01-25 | Cit Alcatel | SELF-HEALING DEVICE OF A RING LINK |
US4964095A (en) * | 1989-05-12 | 1990-10-16 | Alcatel Na, Inc. | Data communication bypass apparatus and method |
US5229876A (en) * | 1990-03-26 | 1993-07-20 | At&T Bell Laboratories | Telemetry for optical fiber amplifier repeater |
US5058105A (en) * | 1990-04-04 | 1991-10-15 | At&T Bell Laboratories | Network alternate routing arrangement |
WO1992004787A1 (en) * | 1990-08-31 | 1992-03-19 | Bell Communications Research, Inc. | Self-healing meshed network using logical ring structures |
US5182744A (en) * | 1991-01-03 | 1993-01-26 | At&T Bell Laboratories | Telecommunications network restoration architecture |
US5200964A (en) * | 1991-03-12 | 1993-04-06 | General Instrument Corporation | Broad linewidth lasers for optical fiber communication systems |
US5166821A (en) * | 1991-03-12 | 1992-11-24 | General Instrument Corporation | Reduction of non-linear effects in optical fiber communication systems and method of using same |
JPH04286230A (en) * | 1991-03-14 | 1992-10-12 | Fujitsu Ltd | Living/spare line switching system |
EP0505655B1 (en) * | 1991-03-25 | 1995-11-15 | International Business Machines Corporation | Fiber optic switch with remote optical powering |
US5179548A (en) * | 1991-06-27 | 1993-01-12 | Bell Communications Research, Inc. | Self-healing bidirectional logical-ring network using crossconnects |
JP2570016B2 (en) * | 1991-08-29 | 1997-01-08 | 富士通株式会社 | Path switch switching method for optical transmission equipment |
AU661339B2 (en) * | 1991-09-03 | 1995-07-20 | Scientific-Atlanta, Inc. | Fiber optic status monitor and control system |
US5218465A (en) * | 1991-09-03 | 1993-06-08 | Motorola, Inc. | Intelligent interconnects for broadband optical networking |
JP2528225B2 (en) * | 1991-09-18 | 1996-08-28 | 富士通株式会社 | Transmission line switching method |
US5457555A (en) * | 1992-01-10 | 1995-10-10 | Fujitsu Limited | Optical transmission system |
US5691976A (en) * | 1992-04-02 | 1997-11-25 | Applied Digital Access | Performance monitoring and test system for a telephone network |
US5365510A (en) * | 1992-04-09 | 1994-11-15 | Northern Telecom Limited | Communications system with a single protection loop |
US5341364A (en) * | 1992-06-02 | 1994-08-23 | At&T Bell Laboratories | Distributed switching in bidirectional multiplex section-switched ringtransmission systems |
US5359450A (en) * | 1992-06-25 | 1994-10-25 | Synchronous Communications, Inc. | Optical transmission system |
US5479608A (en) * | 1992-07-17 | 1995-12-26 | Alcatel Network Systems, Inc. | Group facility protection in a digital telecommunications system |
US5329520A (en) * | 1992-07-17 | 1994-07-12 | Alcatel Network Systems, Inc. | High-speed facility protection in a digital telecommunications system |
JPH06209293A (en) * | 1992-07-31 | 1994-07-26 | American Teleph & Telegr Co <Att> | Modulator in optical transmission system |
US5442623A (en) * | 1992-08-17 | 1995-08-15 | Bell Communications Research, Inc. | Passive protected self healing ring network |
US5329396A (en) * | 1992-10-28 | 1994-07-12 | At&T Bell Laboratories | Reduction of stimulated brillouin scattering in a fiber optic transmission system |
US5373383A (en) * | 1993-03-02 | 1994-12-13 | The Boeing Company | Optical carrier filtering for signal/noise and dynamic range improvement |
US5329392A (en) * | 1993-03-19 | 1994-07-12 | At&T Bell Laboratories | Optical communication system with multiple fiber monitoring |
JP3516972B2 (en) * | 1993-04-22 | 2004-04-05 | 株式会社東芝 | Communications system |
US5333130A (en) * | 1993-05-18 | 1994-07-26 | Alcatel Canada Wire, Inc. | Self-healing drop and insert communication network |
JPH0758717A (en) * | 1993-08-18 | 1995-03-03 | Fujitsu Ltd | Tributary interface of digital transmission equipment |
US5373385A (en) * | 1993-11-12 | 1994-12-13 | At&T Corp. | Method and apparatus for reduction of optical communication system impairments |
US5396357A (en) * | 1994-01-25 | 1995-03-07 | Honeywell Inc. | Fault tolerant optical cross-channel data link |
US5495471A (en) * | 1994-03-09 | 1996-02-27 | Mci Communications Corporation | System and method for restoring a telecommunications network based on a two prong approach |
JP3439533B2 (en) * | 1994-06-24 | 2003-08-25 | 富士通株式会社 | SDH2-fiber ring optical multiplexer having selective protection function |
IT1267645B1 (en) * | 1994-12-09 | 1997-02-07 | Cselt Centro Studi Lab Telecom | RING COMMUNICATION STRUCTURE ON OPTICAL VECTOR AND RELATIVE RECONFIGURABLE NODE. |
JP3376144B2 (en) * | 1994-12-28 | 2003-02-10 | 日本電気株式会社 | Optical network device and optical transmission system |
US5680235A (en) * | 1995-04-13 | 1997-10-21 | Telefonaktiebolaget Lm Ericsson | Optical multichannel system |
US5625478A (en) * | 1995-09-14 | 1997-04-29 | Lucent Technologies Inc. | Optically restorable WDM ring network using simple add/drop circuitry |
-
1996
- 1996-06-28 US US08/672,808 patent/US5777761A/en not_active Expired - Lifetime
- 1996-12-23 WO PCT/US1996/019919 patent/WO1997025829A2/en not_active Application Discontinuation
- 1996-12-23 EP EP96945606A patent/EP0870412A2/en not_active Withdrawn
- 1996-12-23 JP JP09525209A patent/JP2000503192A/en active Pending
- 1996-12-23 CA CA002241106A patent/CA2241106A1/en not_active Abandoned
-
1998
- 1998-06-22 MX MX9805051A patent/MX9805051A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2233851A (en) * | 1989-05-12 | 1991-01-16 | Plessey Telecomm | Optical transmission apparatus |
EP0507379A1 (en) * | 1991-04-02 | 1992-10-07 | ALCATEL BELL Naamloze Vennootschap | Protection arrangement for an optical transmitter/receiver device |
EP0620694A2 (en) * | 1993-04-16 | 1994-10-19 | Nec Corporation | Optical cross-connect system with space and wavelength division switching stages |
Non-Patent Citations (2)
Title |
---|
BRACKETT C A: "DENSE WAVELENGTH DIVISION MULTIPLEXING NETWORKS: PRINCIPLES AND APPLICATIONS", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, vol. 8, no. 6, 1 August 1990 (1990-08-01), pages 948 - 964, XP000208590 * |
NABIL ABD RABOU ET AL: "OPTICAL FIBER TWO-WAY FM VIDEO SIGNAL TRANSMISSION FOR VIDEO CONFERENCING APPLICATIONS", IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, vol. 40, no. 3, 1 August 1994 (1994-08-01), pages 492 - 496, XP000471211 * |
Also Published As
Publication number | Publication date |
---|---|
JP2000503192A (en) | 2000-03-14 |
WO1997025829A2 (en) | 1997-07-17 |
CA2241106A1 (en) | 1997-07-17 |
MX9805051A (en) | 1998-10-31 |
US5777761A (en) | 1998-07-07 |
EP0870412A2 (en) | 1998-10-14 |
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