GB1427728A - Network control security arrangements for use in telecommunication switching systems - Google Patents

Network control security arrangements for use in telecommunication switching systems

Info

Publication number
GB1427728A
GB1427728A GB3966872A GB3966872A GB1427728A GB 1427728 A GB1427728 A GB 1427728A GB 3966872 A GB3966872 A GB 3966872A GB 3966872 A GB3966872 A GB 3966872A GB 1427728 A GB1427728 A GB 1427728A
Authority
GB
United Kingdom
Prior art keywords
control
control centre
sector
standby
area
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
GB3966872A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB3966872A priority Critical patent/GB1427728A/en
Priority to ZA735522A priority patent/ZA735522B/en
Priority to AU59623/73A priority patent/AU484087B2/en
Publication of GB1427728A publication Critical patent/GB1427728A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
    • H04Q3/545—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using a stored programme

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

1427728 Automatic exchange systems PLESSEY CO Ltd 9 Aug 1973 [25 Aug 1972] 39668/72 Heading H4K An exchange system is arranged as a plurality of control areas each including a common control centre exercising control via data links upon a plurality of remote switching units and each control area is divided geographically into a plurality of sectors each including a plurality of remote switching units so that if the common control centre for the control area should fail, the control responsibility for each sector can be transferred to a geographically adjacent control centre. The Figure shows within a rectangle the control area for common control centre CCU1 which area is sub-divided into four sectors SUB-AREA 1 to 4. In addition to the data links, e.g. DLX, DLA, DLN connecting the remote switching units with their area control centre there are provided standby data links, e.g. SBDLA linking each sector with a respective geographically adjacent control area. The control centres CCU utilize stored programme control and have stored in a backing store the interconnection pattern and a recent directory to equipment number translation table for those sectors which they may have to take over. Failure of a control centre, e.g. CCU1 is detected by data path monitors associated with the remote switching units and the detection results in the enabling of the standby data path(s) for the sector(s) and the receipt of an alarm signal at the standby control contre(s). On receipt of this alarm a standby control centre signals a maintenance control centre MCC and the receipt of such signals from four standby control centres indicates total failure of control centre CCU1. Each standby control centre rearranges its operation to include the extra sector and the information in its backing store concerning the sector is updated by information supplied by the maintenance control centre. The changeover is capable of being achieved in about 20 secs. To overcome the problem that the standby control centre has no knowledge of the existing calls in the sector taken over all existing calls may be forced released after a period of time, e.g. 5 mins. A marker arrangement capable of performing this operation is disclosed in Specification 1,383,107.
GB3966872A 1972-08-25 1972-08-25 Network control security arrangements for use in telecommunication switching systems Expired GB1427728A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3966872A GB1427728A (en) 1972-08-25 1972-08-25 Network control security arrangements for use in telecommunication switching systems
ZA735522A ZA735522B (en) 1972-08-25 1973-08-13 Network control security arrangements for use in telecommunication switching systems
AU59623/73A AU484087B2 (en) 1972-08-25 1973-08-24 Network control security arrangements for use in telecommunication switching systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3966872A GB1427728A (en) 1972-08-25 1972-08-25 Network control security arrangements for use in telecommunication switching systems

Publications (1)

Publication Number Publication Date
GB1427728A true GB1427728A (en) 1976-03-10

Family

ID=10410816

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3966872A Expired GB1427728A (en) 1972-08-25 1972-08-25 Network control security arrangements for use in telecommunication switching systems

Country Status (2)

Country Link
GB (1) GB1427728A (en)
ZA (1) ZA735522B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0271169A2 (en) * 1986-12-10 1988-06-15 Philips Patentverwaltung GmbH Method and circuit arrangement for a decentralised replacement network

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0271169A2 (en) * 1986-12-10 1988-06-15 Philips Patentverwaltung GmbH Method and circuit arrangement for a decentralised replacement network
EP0271169A3 (en) * 1986-12-10 1989-09-27 Philips Patentverwaltung GmbH Method and circuit arrangement for a decentralised replacement network

Also Published As

Publication number Publication date
ZA735522B (en) 1974-07-31
AU5962373A (en) 1975-02-27

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee