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JPS5758419A - Uninterruptible transmission line switching system - Google Patents

Uninterruptible transmission line switching system

Info

Publication number
JPS5758419A
JPS5758419A JP13333680A JP13333680A JPS5758419A JP S5758419 A JPS5758419 A JP S5758419A JP 13333680 A JP13333680 A JP 13333680A JP 13333680 A JP13333680 A JP 13333680A JP S5758419 A JPS5758419 A JP S5758419A
Authority
JP
Japan
Prior art keywords
current
transmission
spare
phase
switching
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.)
Granted
Application number
JP13333680A
Other languages
Japanese (ja)
Other versions
JPS639689B2 (en
Inventor
Takashi Wakabayashi
Takeo Fukushima
Tetsuo Murase
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
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13333680A priority Critical patent/JPS5758419A/en
Publication of JPS5758419A publication Critical patent/JPS5758419A/en
Publication of JPS639689B2 publication Critical patent/JPS639689B2/ja
Granted legal-status Critical Current

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)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To increase the reliability of transmission system, by the reception without causing distortion of signals at reception section, through the switching by matching the phase of both signals without monentary interruption, in switching from a present transmission line to a spare transmission line. CONSTITUTION:Transmitting side devices 1-1, 1-2 are connected to reception side devices via normal current output switches 2-1, 2-2, current terminal stations 4-1, 4-2, current transmission lines 5-1, 5-2 and through current input switches 7-1, 7-2 and phase control circuits 9-1, 9-2, for transmission. If a failure takes place in the line 5-1, first a switching output switch 3 and a switching input switch 8-1 are closed to connect the current and spare transmission lines 5-1, 5-3 in parallel between the transmission and reception devices, and the phase of a signal at the spare side is corrected at the phase control circuit 9-1 to match it with the phase of the signal at the current side. Thereafter, the signal is switched in high speed from the current side to the spare side, and the current transmission line is disconnected by opening the current switches 2-1, 7-1 at the same time.
JP13333680A 1980-09-25 1980-09-25 Uninterruptible transmission line switching system Granted JPS5758419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13333680A JPS5758419A (en) 1980-09-25 1980-09-25 Uninterruptible transmission line switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13333680A JPS5758419A (en) 1980-09-25 1980-09-25 Uninterruptible transmission line switching system

Publications (2)

Publication Number Publication Date
JPS5758419A true JPS5758419A (en) 1982-04-08
JPS639689B2 JPS639689B2 (en) 1988-03-01

Family

ID=15102329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13333680A Granted JPS5758419A (en) 1980-09-25 1980-09-25 Uninterruptible transmission line switching system

Country Status (1)

Country Link
JP (1) JPS5758419A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797903A (en) * 1986-05-23 1989-01-10 Fujitsu Limited Channel switching system without instantaneous signal loss
JPH04291530A (en) * 1991-03-20 1992-10-15 Nec Corp N/1 redundancy configuration circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5284947A (en) * 1976-01-07 1977-07-14 Hitachi Denshi Ltd Spare for carrier supply circuit
JPS52103910A (en) * 1976-02-06 1977-08-31 Gen Erekutoritsuku Co Ltd Za Digital repeater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5284947A (en) * 1976-01-07 1977-07-14 Hitachi Denshi Ltd Spare for carrier supply circuit
JPS52103910A (en) * 1976-02-06 1977-08-31 Gen Erekutoritsuku Co Ltd Za Digital repeater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797903A (en) * 1986-05-23 1989-01-10 Fujitsu Limited Channel switching system without instantaneous signal loss
JPH04291530A (en) * 1991-03-20 1992-10-15 Nec Corp N/1 redundancy configuration circuit

Also Published As

Publication number Publication date
JPS639689B2 (en) 1988-03-01

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