JPS53120308A - Automatic channel switching system - Google Patents

Automatic channel switching system

Info

Publication number
JPS53120308A
JPS53120308A JP3454377A JP3454377A JPS53120308A JP S53120308 A JPS53120308 A JP S53120308A JP 3454377 A JP3454377 A JP 3454377A JP 3454377 A JP3454377 A JP 3454377A JP S53120308 A JPS53120308 A JP S53120308A
Authority
JP
Japan
Prior art keywords
switching system
channel switching
automatic channel
line
possesses
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.)
Pending
Application number
JP3454377A
Other languages
Japanese (ja)
Inventor
Hiroyuki Nakano
Keigi Koga
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3454377A priority Critical patent/JPS53120308A/en
Publication of JPS53120308A publication Critical patent/JPS53120308A/en
Pending 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)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To make it possible to switch channels automatically, by making use of a control line and data line on a MODEM interface in the on-line system which possesses a stand-by circuit.
JP3454377A 1977-03-30 1977-03-30 Automatic channel switching system Pending JPS53120308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3454377A JPS53120308A (en) 1977-03-30 1977-03-30 Automatic channel switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3454377A JPS53120308A (en) 1977-03-30 1977-03-30 Automatic channel switching system

Publications (1)

Publication Number Publication Date
JPS53120308A true JPS53120308A (en) 1978-10-20

Family

ID=12417205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3454377A Pending JPS53120308A (en) 1977-03-30 1977-03-30 Automatic channel switching system

Country Status (1)

Country Link
JP (1) JPS53120308A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161153A (en) * 1983-03-04 1984-09-11 Hitachi Ltd Switching system of packet switchboard
JPS61230442A (en) * 1985-04-04 1986-10-14 Fujitsu Ltd Set standby digital transmission system
JPH02272842A (en) * 1989-04-13 1990-11-07 Toyo Commun Equip Co Ltd Base band network system
JPH05504665A (en) * 1990-01-04 1993-07-15 コーデックス・コーポレイション Automatic data recovery for modems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161153A (en) * 1983-03-04 1984-09-11 Hitachi Ltd Switching system of packet switchboard
JPH0556057B2 (en) * 1983-03-04 1993-08-18 Hitachi Ltd
JPS61230442A (en) * 1985-04-04 1986-10-14 Fujitsu Ltd Set standby digital transmission system
JPH02272842A (en) * 1989-04-13 1990-11-07 Toyo Commun Equip Co Ltd Base band network system
JPH05504665A (en) * 1990-01-04 1993-07-15 コーデックス・コーポレイション Automatic data recovery for modems

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