GB1444919A - Telecommunication switching systems wiring harnesses for buildings - Google Patents

Telecommunication switching systems wiring harnesses for buildings

Info

Publication number
GB1444919A
GB1444919A GB5244672A GB5244672A GB1444919A GB 1444919 A GB1444919 A GB 1444919A GB 5244672 A GB5244672 A GB 5244672A GB 5244672 A GB5244672 A GB 5244672A GB 1444919 A GB1444919 A GB 1444919A
Authority
GB
United Kingdom
Prior art keywords
time
incoming
switch
speech
outgoing
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
GB5244672A
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 GB5244672A priority Critical patent/GB1444919A/en
Priority to ZA738682A priority patent/ZA738682B/en
Publication of GB1444919A publication Critical patent/GB1444919A/en
Expired legal-status Critical Current

Links

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
    • H04Q11/06—Time-space-time switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

1444919 Time division multiplex switching GENERAL ELECTRIC CO Ltd 14 Nov 1973 [14 Nov 1972] 52446/72 Heading H4K In a time-space-time switch for switching between incoming 10, 12 and outgoing 14, 16 TDM highways, a predetermined test-pattern is inserted into an incoming time slot and the outgoing time slot into which information in the incoming slot is switched is checked to see that the test pattern has been correctly received. Time switching.-To connect an incoming channel X on highway 10 to outgoing channel Y on highway 14 the speech address memory 50 of time switch and the speech address memory 54 of time switch 28 are examined to find a location A which is free in both memories, which is then marked "busy". Since the switching of the cross-point switches 36-42 is effected by cross-point address memories 44-46 at the same rate as the incoming and outgoing channel rate, a space-switch time slot A has thereby been found in which the required cross-point switch 36 is operated. Data x in incoming slot X is switched into space switch time slot A under the control of speech memory 48, speech address memory 50 and cross-point address memory 44, and hence passes to outgoing time switch 28. Here it is switched into outgoing time slot Y, under the control of speech memory 52 and speech address memory 54. Control of all the memories 44-54 is effected by supervisory signals from a switch control unit. Testing.-Each time the switch control provides data giving the identity of a calling incoming channel, a test pattern generated 104 becomes operative. The generator prevents the incoming data in the time slot to be tested from being inserted into the speech memory 48, replacing it with a test pattern. Two different patterns are inserted into alternate frames, one pattern being the logical complement of the other, e.g. 10101010 and 01010101. In this way both polarities of the circuitry are tested. When the test pattern has been switched through the system, it is checked by a checking logic circuit 105. In a further embodiment, Fig. 3 (not shown), multiplexing takes place within the incoming time switch.
GB5244672A 1972-11-14 1972-11-14 Telecommunication switching systems wiring harnesses for buildings Expired GB1444919A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5244672A GB1444919A (en) 1972-11-14 1972-11-14 Telecommunication switching systems wiring harnesses for buildings
ZA738682A ZA738682B (en) 1972-11-14 1973-11-13 Improvements in or relating to telecommunication switching systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5244672A GB1444919A (en) 1972-11-14 1972-11-14 Telecommunication switching systems wiring harnesses for buildings

Publications (1)

Publication Number Publication Date
GB1444919A true GB1444919A (en) 1976-08-04

Family

ID=10463953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5244672A Expired GB1444919A (en) 1972-11-14 1972-11-14 Telecommunication switching systems wiring harnesses for buildings

Country Status (2)

Country Link
GB (1) GB1444919A (en)
ZA (1) ZA738682B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397759A1 (en) * 1977-07-13 1979-02-09 Ericsson Telefon Ab L M TEST AND FAULT LOCATION PROCESS FOR INSTALLATION OPERATING BY MULTIPLEXING BY DIVISION IN TIME
US4149038A (en) * 1978-05-15 1979-04-10 Wescom Switching, Inc. Method and apparatus for fault detection in PCM muliplexed system
EP0025225A1 (en) * 1979-09-10 1981-03-18 Western Electric Company, Incorporated Broadcast and alternate message time slot interchanger
EP0028104A1 (en) * 1979-10-17 1981-05-06 Fujitsu Limited Signal control system for a time-division speech network
FR2491712A1 (en) * 1980-10-07 1982-04-09 Italtel Spa DEVICE FOR SPATIO-TEMPORAL CONTROL OF DYNAMIC CONNECTIONS OF A TRANSIT NETWORK FOR TIME DIVISION TELECOMMUNICATIONS SYSTEMS
EP0051494A1 (en) * 1980-11-05 1982-05-12 Anaconda-Ericsson, Inc., Automatic maintenance and self-test system for a digital multiplexed telecommunication system
FR2503511A1 (en) * 1981-04-03 1982-10-08 Cit Alcatel Digital switching system for telephonic auto-commutator - utilises microprocessor in marker unit to drive memory controller for buffer memories in switching network
FR2532505A1 (en) * 1982-08-30 1984-03-02 Western Electric Co MAINTENANCE OF SWITCHING SYSTEMS COMMANDED BY A MEMORIZED PROGRAM
GB2141606A (en) * 1983-06-16 1984-12-19 Mitel Corp Switching system loopback test circuit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397759A1 (en) * 1977-07-13 1979-02-09 Ericsson Telefon Ab L M TEST AND FAULT LOCATION PROCESS FOR INSTALLATION OPERATING BY MULTIPLEXING BY DIVISION IN TIME
US4149038A (en) * 1978-05-15 1979-04-10 Wescom Switching, Inc. Method and apparatus for fault detection in PCM muliplexed system
EP0025225A1 (en) * 1979-09-10 1981-03-18 Western Electric Company, Incorporated Broadcast and alternate message time slot interchanger
EP0028104A1 (en) * 1979-10-17 1981-05-06 Fujitsu Limited Signal control system for a time-division speech network
FR2491712A1 (en) * 1980-10-07 1982-04-09 Italtel Spa DEVICE FOR SPATIO-TEMPORAL CONTROL OF DYNAMIC CONNECTIONS OF A TRANSIT NETWORK FOR TIME DIVISION TELECOMMUNICATIONS SYSTEMS
EP0051494A1 (en) * 1980-11-05 1982-05-12 Anaconda-Ericsson, Inc., Automatic maintenance and self-test system for a digital multiplexed telecommunication system
FR2503511A1 (en) * 1981-04-03 1982-10-08 Cit Alcatel Digital switching system for telephonic auto-commutator - utilises microprocessor in marker unit to drive memory controller for buffer memories in switching network
FR2532505A1 (en) * 1982-08-30 1984-03-02 Western Electric Co MAINTENANCE OF SWITCHING SYSTEMS COMMANDED BY A MEMORIZED PROGRAM
GB2126050A (en) * 1982-08-30 1984-03-14 Western Electric Co Maintenance of stored program controlled switching systems
GB2141606A (en) * 1983-06-16 1984-12-19 Mitel Corp Switching system loopback test circuit

Also Published As

Publication number Publication date
ZA738682B (en) 1974-10-30

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Legal Events

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