FI881395A0 - Saekerhetsanordning foer ett system i fjaerrkommunikationsvaexel. - Google Patents

Saekerhetsanordning foer ett system i fjaerrkommunikationsvaexel.

Info

Publication number: FI881395A0
Authority: FI; Finland
Prior art keywords: fjaerrkommunikationsvaexel; foer ett; ett system; saekerhetsanordning; saekerhetsanordning foer
Prior art date: 1986-07-24

Application number

FI881395A

Other languages

English (en)

Other versions

FI881395A (fi

Inventor

John William Ansell

Geoffrey Chopping

Richard Noel Waters

Original Assignee

Plessey Co Plc

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.)

1986-07-24

Filing date

1988-03-23

Publication date

1988-03-23

1988-03-23 Application filed by Plessey Co Plc filed Critical Plessey Co Plc

1988-03-23 Publication of FI881395A0 publication Critical patent/FI881395A0/fi

1988-03-23 Publication of FI881395A publication Critical patent/FI881395A/fi

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0421—Circuit arrangements therefor
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
- H04M3/244—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for multiplex systems
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Monitoring And Testing Of Exchanges (AREA)
Exchange Systems With Centralized Control (AREA)
Time-Division Multiplex Systems (AREA)

FI881395A 1986-07-24 1988-03-23 Saekerhetsanordning foer ett system i fjaerrkommunikationsvaexel. FI881395A (fi)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB868618100A GB8618100D0 (en)	1986-07-24	1986-07-24	Security arrangement
PCT/GB1987/000525 WO1988000786A2 (en)	1986-07-24	1987-07-22	Security arrangement for a telecommunications exchange system

Publications (2)

Publication Number	Publication Date
FI881395A0 true FI881395A0 (fi)	1988-03-23
FI881395A FI881395A (fi)	1988-03-23

Family

ID=10601635

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FI881395A FI881395A (fi)	1986-07-24	1988-03-23	Saekerhetsanordning foer ett system i fjaerrkommunikationsvaexel.

Country Status (11)

Country	Link
US (1)	US4858223A (fi)
EP (1)	EP0254559A3 (fi)
JP (1)	JPH01500951A (fi)
KR (1)	KR880702035A (fi)
CN (1)	CN1008049B (fi)
DK (1)	DK162688A (fi)
FI (1)	FI881395A (fi)
GB (2)	GB8618100D0 (fi)
IN (1)	IN168441B (fi)
PT (1)	PT85393A (fi)
WO (1)	WO1988000786A2 (fi)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2219172B (en) *	1988-03-30	1992-07-08	Plessey Co Plc	A data path checking system
SE515342C2 (sv) *	1994-04-29	2001-07-16	Ericsson Telefon Ab L M	Digitalt tidsväljarsystem
WO2009073602A2 (en) *	2007-11-30	2009-06-11	University Of South Florida	Trans-endoscopic hydraulic balloon apparatus
US8731002B2 (en) *	2011-03-25	2014-05-20	Invensense, Inc.	Synchronization, re-synchronization, addressing, and serialized signal processing for daisy-chained communication devices
US9226292B2 (en) *	2013-07-17	2015-12-29	Cisco Technology, Inc.	Resilient forwarding of packets in an ARC chain topology network

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL183331C (nl) *	1973-03-19	1988-09-16	Ericsson Telefon Ab L M	Tijdmultiplexschakelinrichting voor het schakelen van digitale gegevens in een telefoon- of gegevensstelsel.
FR2233780B1 (fi) *	1973-06-13	1977-05-06	Materiel Telephonique
GB1582456A (en) *	1977-04-02	1981-01-07	Gen Electric	Digital telecommunication switching systems
US4149038A (en) *	1978-05-15	1979-04-10	Wescom Switching, Inc.	Method and apparatus for fault detection in PCM muliplexed system
IT8003532A0 (it) *	1980-10-07	1980-10-07	Italtel Spa	Dispositivo per il controllo della continuita' spazio-temporale dei collegamenti dinamici di una retedi transito per sistemi di telecomunicazioni a divisione di tempo
IT1133349B (it) *	1980-10-07	1986-07-09	Italtel Spa	Rete di transito perfezionata per sistemi di telecomunicazioni a divisione di tempo
US4424421A (en) *	1981-10-23	1984-01-03	Lynch Communication Systems, Inc.	Apparatus for testing subscriber carrier systems
US4382294A (en) *	1981-10-26	1983-05-03	Bell Telephone Laboratories, Incorporated	Telephone switching control arrangement
US4413335A (en) *	1981-11-27	1983-11-01	Gte Automatic Electric Labs Inc.	Fault recovery apparatus for a PCM switching network
GB2120041B (en) *	1982-04-24	1985-10-02	Plessey Co Plc	Digital switching network for telecommunications exchange
US4500985A (en) *	1982-12-08	1985-02-19	At&T Bell Laboratories	Communication path continuity verification arrangement
US4543651A (en) *	1983-09-12	1985-09-24	At&T Bell Laboratories	Duplicated time division switching system
GB2181023B (en) *	1985-09-24	1989-04-05	Stc Plc	Telecommunications switching system

1986
- 1986-07-24 GB GB868618100A patent/GB8618100D0/en active Pending
1987
- 1987-04-29 GB GB8710191A patent/GB2193062B/en not_active Expired - Lifetime
- 1987-07-22 JP JP62504690A patent/JPH01500951A/ja active Pending
- 1987-07-22 EP EP87306499A patent/EP0254559A3/en not_active Withdrawn
- 1987-07-22 WO PCT/GB1987/000525 patent/WO1988000786A2/en active Application Filing
- 1987-07-23 PT PT85393A patent/PT85393A/pt not_active Application Discontinuation
- 1987-07-24 IN IN569/CAL/87A patent/IN168441B/en unknown
- 1987-07-24 CN CN87106044A patent/CN1008049B/zh not_active Expired
1988
- 1988-03-23 FI FI881395A patent/FI881395A/fi not_active IP Right Cessation
- 1988-03-24 KR KR1019880700323A patent/KR880702035A/ko not_active Application Discontinuation
- 1988-03-24 DK DK162688A patent/DK162688A/da not_active IP Right Cessation
- 1988-05-20 US US07/170,384 patent/US4858223A/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
GB2193062B (en)	1990-03-28
PT85393A (pt)	1988-07-29
EP0254559A3 (en)	1988-05-04
DK162688D0 (da)	1988-03-24
GB8710191D0 (en)	1987-06-03
GB2193062A (en)	1988-01-27
WO1988000786A3 (en)	1988-03-24
CN87106044A (zh)	1988-05-18
GB8618100D0 (en)	1986-09-03
CN1008049B (zh)	1990-05-16
IN168441B (fi)	1991-04-06
JPH01500951A (ja)	1989-03-30
EP0254559A2 (en)	1988-01-27
WO1988000786A2 (en)	1988-01-28
KR880702035A (ko)	1988-11-07
US4858223A (en)	1989-08-15
FI881395A (fi)	1988-03-23
DK162688A (da)	1988-05-24

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Legal Events

Date	Code	Title	Description
1993-01-31	FD	Application lapsed
2004-08-31	MM	Patent lapsed	Owner name: GEC PLESSEY TELECOMMUNICATIONS LIMITED