FI904834A - SYSTEM FOER SAEKRING AV STAMFREKVENSCENTRALKANALERNA VID EN DIGITAL OEVERFOERINGSANORDNING. - Google Patents

SYSTEM FOER SAEKRING AV STAMFREKVENSCENTRALKANALERNA VID EN DIGITAL OEVERFOERINGSANORDNING. Download PDF

Info

Publication number
FI904834A
FI904834A FI904834A FI904834A FI904834A FI 904834 A FI904834 A FI 904834A FI 904834 A FI904834 A FI 904834A FI 904834 A FI904834 A FI 904834A FI 904834 A FI904834 A FI 904834A
Authority
FI
Finland
Prior art keywords
stamfrekvenscentralkanalerna
saekring
oeverfoeringsanordning
vid
digital
Prior art date
Application number
FI904834A
Other languages
Finnish (fi)
Other versions
FI87123B (en
FI87123C (en
FI904834A0 (en
Inventor
Reino Talarmo
Jukka Ruosteoja
Harri Lahti
Esa Toermae
Original Assignee
Telenokia Oy
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 Telenokia Oy filed Critical Telenokia Oy
Priority to FI904834A priority Critical patent/FI87123C/en
Publication of FI904834A0 publication Critical patent/FI904834A0/en
Priority to DE19914132729 priority patent/DE4132729C2/en
Priority to GB9120928A priority patent/GB2250894B/en
Publication of FI904834A publication Critical patent/FI904834A/en
Publication of FI87123B publication Critical patent/FI87123B/en
Application granted granted Critical
Publication of FI87123C publication Critical patent/FI87123C/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FI904834A 1990-10-01 1990-10-01 System for securing the trunk frequency central channels in a digital transmission device FI87123C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI904834A FI87123C (en) 1990-10-01 1990-10-01 System for securing the trunk frequency central channels in a digital transmission device
DE19914132729 DE4132729C2 (en) 1990-10-01 1991-10-01 Circuit arrangement for creating redundancy for baseband main channels of a digital transmission device
GB9120928A GB2250894B (en) 1990-10-01 1991-10-01 System for providing redundancy for the baseband main channels of digital transmission equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI904834 1990-10-01
FI904834A FI87123C (en) 1990-10-01 1990-10-01 System for securing the trunk frequency central channels in a digital transmission device

Publications (4)

Publication Number Publication Date
FI904834A0 FI904834A0 (en) 1990-10-01
FI904834A true FI904834A (en) 1992-04-02
FI87123B FI87123B (en) 1992-08-14
FI87123C FI87123C (en) 1992-11-25

Family

ID=8531153

Family Applications (1)

Application Number Title Priority Date Filing Date
FI904834A FI87123C (en) 1990-10-01 1990-10-01 System for securing the trunk frequency central channels in a digital transmission device

Country Status (3)

Country Link
DE (1) DE4132729C2 (en)
FI (1) FI87123C (en)
GB (1) GB2250894B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI109737B (en) * 1993-08-25 2002-09-30 Nokia Corp Method and system for controlling the fuse of the recipients' frequency-frequency central channels in a digital transmission device
US5408462A (en) * 1993-10-07 1995-04-18 Adc Telecommunications, Inc. Protection switching apparatus and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB784129A (en) * 1953-08-31 1957-10-02 British Telecomm Res Ltd Improvements in or relating to electrical signalling systems
JPS58134545A (en) * 1982-02-04 1983-08-10 Nec Corp Service channel signal transmitting system
JPS60208134A (en) * 1984-04-02 1985-10-19 Nec Corp Radio communication system
JPS60254928A (en) * 1984-05-31 1985-12-16 Nec Corp Set stand-by communication system

Also Published As

Publication number Publication date
GB2250894B (en) 1995-01-04
DE4132729C2 (en) 2002-01-31
GB2250894A (en) 1992-06-17
DE4132729A1 (en) 1992-04-02
GB9120928D0 (en) 1991-11-13
FI87123B (en) 1992-08-14
FI87123C (en) 1992-11-25
FI904834A0 (en) 1990-10-01

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Legal Events

Date Code Title Description
FG Patent granted

Owner name: TELENOKIA OY

MA Patent expired