GB1520153A - Digital relay systems - Google Patents

Digital relay systems

Info

Publication number
GB1520153A
GB1520153A GB473076A GB473076A GB1520153A GB 1520153 A GB1520153 A GB 1520153A GB 473076 A GB473076 A GB 473076A GB 473076 A GB473076 A GB 473076A GB 1520153 A GB1520153 A GB 1520153A
Authority
GB
United Kingdom
Prior art keywords
channel
changeover
data signals
operating
reserve
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
Application number
GB473076A
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.)
General Electric Co PLC
Original Assignee
General Electric 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.)
Filing date
Publication date
Application filed by General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB473076A priority Critical patent/GB1520153A/en
Priority to DE19772703625 priority patent/DE2703625A1/en
Priority to CH139977A priority patent/CH615546A5/en
Priority to CA271,085A priority patent/CA1090425A/en
Priority to IT6726477A priority patent/IT1073255B/en
Priority to JP1153877A priority patent/JPS52103910A/en
Publication of GB1520153A publication Critical patent/GB1520153A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A delay arrangement (39), an error detector (40) and a control logic circuit (43) are provided to switch one of the operating channels (16-20) over to the reserve channel (28) or vice versa. With the aid of the aforementioned devices, a synchronous relationship is established between the phase of the data signals which pass through the reserve channel (28) and the phase of the data signals which pass through the operating channel which is to be replaced. Furthermore, a changeover switch (34, 35, 36, 37, 38) is in each case assigned to each operating channel (16-20). The control inputs of the changeover switches are connected to outputs (44-48) of the control logic circuit (43) for switching the relevant operating channel over to the reserve channel (28). The changeover is enabled when the error detector (40) identifies precise synchronisation between the aforementioned data signals. In this way, data transmission is not impaired during channel changeover; no data can be lost. <IMAGE>
GB473076A 1976-02-06 1976-02-06 Digital relay systems Expired GB1520153A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB473076A GB1520153A (en) 1976-02-06 1976-02-06 Digital relay systems
DE19772703625 DE2703625A1 (en) 1976-02-06 1977-01-28 DIGITAL RELAY SYSTEM
CH139977A CH615546A5 (en) 1976-02-06 1977-02-04 Digital relay system in a transmission system, with a multiplicity of operating channels and with one reserve channel
CA271,085A CA1090425A (en) 1976-02-06 1977-02-04 Digital radio relay systems
IT6726477A IT1073255B (en) 1976-02-06 1977-02-04 NUMBER SIGNALS TRANSMISSION BRIDGE
JP1153877A JPS52103910A (en) 1976-02-06 1977-02-04 Digital repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB473076A GB1520153A (en) 1976-02-06 1976-02-06 Digital relay systems

Publications (1)

Publication Number Publication Date
GB1520153A true GB1520153A (en) 1978-08-02

Family

ID=9782714

Family Applications (1)

Application Number Title Priority Date Filing Date
GB473076A Expired GB1520153A (en) 1976-02-06 1976-02-06 Digital relay systems

Country Status (6)

Country Link
JP (1) JPS52103910A (en)
CA (1) CA1090425A (en)
CH (1) CH615546A5 (en)
DE (1) DE2703625A1 (en)
GB (1) GB1520153A (en)
IT (1) IT1073255B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443408A (en) * 1977-09-13 1979-04-06 Nippon Telegr & Teleph Corp <Ntt> Error control system
JPS55143850A (en) * 1979-04-26 1980-11-10 Nec Corp Pcm line switching system
FR2462065A1 (en) * 1979-07-24 1981-02-06 Thomson Csf Switching of numeric signal equipment - using memory and coincidence detector techniques with two circuits transmitting same data under different conditions
DE2939253A1 (en) * 1979-09-27 1981-04-30 Siemens AG, 1000 Berlin und 8000 München Multiple redundant data transmission system - uses test signal to control change-over of transmission lines if line failure occurs
JPS5758419A (en) * 1980-09-25 1982-04-08 Fujitsu Ltd Uninterruptible transmission line switching system
JPS58177042A (en) * 1982-04-09 1983-10-17 Nec Corp Transmission failure reduction system
JP3561787B2 (en) * 1994-06-30 2004-09-02 和通 藤原 Method and apparatus for imparting acoustic vibration sensation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2106835C3 (en) * 1971-02-13 1982-07-15 Philips Patentverwaltung Gmbh, 2000 Hamburg Modem coupler

Also Published As

Publication number Publication date
CH615546A5 (en) 1980-01-31
IT1073255B (en) 1985-04-13
DE2703625A1 (en) 1977-08-11
JPS52103910A (en) 1977-08-31
CA1090425A (en) 1980-11-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee