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GB2342257B - Add-drop multiplexers - Google Patents

Add-drop multiplexers

Info

Publication number
GB2342257B
GB2342257B GB9929817A GB9929817A GB2342257B GB 2342257 B GB2342257 B GB 2342257B GB 9929817 A GB9929817 A GB 9929817A GB 9929817 A GB9929817 A GB 9929817A GB 2342257 B GB2342257 B GB 2342257B
Authority
GB
United Kingdom
Prior art keywords
add
drop multiplexers
multiplexers
drop
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.)
Expired - Lifetime
Application number
GB9929817A
Other versions
GB2342257A (en
GB9929817D0 (en
Inventor
Masahiro Shinbashi
Akihiko Oka
Kazuo Takatsu
Hideaki Mochizuki
Junichi Ishiwatari
Koji Iwamoto
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
Priority claimed from JP03566095A external-priority patent/JP3442180B2/en
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of GB9929817D0 publication Critical patent/GB9929817D0/en
Publication of GB2342257A publication Critical patent/GB2342257A/en
Application granted granted Critical
Publication of GB2342257B publication Critical patent/GB2342257B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0003—Switching fabrics, e.g. transport network, control network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0046—User Network Interface
    • H04J2203/0048—Network termination, e.g. NT1, NT2, PBX
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057—Operations, administration and maintenance [OAM]
    • H04J2203/006—Fault tolerance and recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0064—Admission Control
    • H04J2203/0067—Resource management and allocation
    • H04J2203/0069—Channel allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
GB9929817A 1995-02-23 1996-02-23 Add-drop multiplexers Expired - Lifetime GB2342257B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP03566095A JP3442180B2 (en) 1995-02-23 1995-02-23 Add-drop multiplex equipment
GB9603922A GB2298767B (en) 1995-02-23 1996-02-23 Add-drop multiplexers

Publications (3)

Publication Number Publication Date
GB9929817D0 GB9929817D0 (en) 2000-02-09
GB2342257A GB2342257A (en) 2000-04-05
GB2342257B true GB2342257B (en) 2000-05-24

Family

ID=26308798

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9930548A Expired - Lifetime GB2342014B (en) 1995-02-23 1996-02-23 Add-drop multiplexers
GB9929817A Expired - Lifetime GB2342257B (en) 1995-02-23 1996-02-23 Add-drop multiplexers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9930548A Expired - Lifetime GB2342014B (en) 1995-02-23 1996-02-23 Add-drop multiplexers

Country Status (1)

Country Link
GB (2) GB2342014B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214783A2 (en) * 1985-08-26 1987-03-18 AT&T Corp. Digital transmisson including add/drop module

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9401430D0 (en) * 1994-01-26 1994-03-23 Plessey Telecomm Switching system for a telecommunications system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214783A2 (en) * 1985-08-26 1987-03-18 AT&T Corp. Digital transmisson including add/drop module
US4716561A (en) * 1985-08-26 1987-12-29 American Telephone And Telegraph Company, At&T Bell Laboratories Digital transmission including add/drop module

Also Published As

Publication number Publication date
GB9930548D0 (en) 2000-02-16
GB2342257A (en) 2000-04-05
GB9929817D0 (en) 2000-02-09
GB2342014A (en) 2000-03-29
GB2342014B (en) 2000-05-17

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20160222