GB1408713A - Telephone system having a plurality of classes of services - Google Patents

Telephone system having a plurality of classes of services

Info

Publication number
GB1408713A
GB1408713A GB486473A GB486473A GB1408713A GB 1408713 A GB1408713 A GB 1408713A GB 486473 A GB486473 A GB 486473A GB 486473 A GB486473 A GB 486473A GB 1408713 A GB1408713 A GB 1408713A
Authority
GB
United Kingdom
Prior art keywords
class
line
service
connection
location
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
GB486473A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1408713A publication Critical patent/GB1408713A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephonic Communication Services (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

1408713 Automatic exchange systems INTERNATIONAL BUSINESS MACHINES CORP 31 Jan 1973 [8 Feb 1972] 4864/73 Heading H4K In a telephone system, during each call the class of service of the calling line is determined and a class of service marking produced, the class of service of the connection required is also determined and a further marking produced, the two markings being used to select in co-ordinate fashion a location in a store, each location storing a binary element indicating whether a connection of a particular class may be made by a caller of a particular class. As shown a PABX determines from the origin of the connection (e.g. a public line, a tie line or a data line) or from the digits dialled, the class of service of the connection by comparison with a class of facility table. A particular PABX extension involved is identified in known fashion and the class of that extension determined from a class of line table. Each class mark appears as a marking on a single wire and the two together select a coordinate location in a compatibility table, which location stores a single bit indicating whether that particular call is allowable. The compatibility table may be consulted more than once using, say, successively dialled digit groups. The compatibility table may also have an additional column corresponding to a line class zero, the bit in each row indicating whether that particular facility has been temporarily withdrawn.
GB486473A 1972-02-08 1973-01-31 Telephone system having a plurality of classes of services Expired GB1408713A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7204896A FR2171676A5 (en) 1972-02-08 1972-02-08

Publications (1)

Publication Number Publication Date
GB1408713A true GB1408713A (en) 1975-10-01

Family

ID=9093461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB486473A Expired GB1408713A (en) 1972-02-08 1973-01-31 Telephone system having a plurality of classes of services

Country Status (7)

Country Link
JP (1) JPS4893206A (en)
BE (1) BE795147A (en)
CA (1) CA992184A (en)
DE (1) DE2304925C3 (en)
FR (1) FR2171676A5 (en)
GB (1) GB1408713A (en)
IT (1) IT978737B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2830282C3 (en) * 1978-07-10 1981-10-15 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for telecommunication switching systems, in particular telephone switching systems with devices for authorization evaluation
DE2830281C3 (en) * 1978-07-10 1981-06-25 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for telecommunications switching systems, in particular telephone switching systems, with devices for evaluating authorization
DE2929514C2 (en) * 1979-07-20 1985-04-18 Siemens AG, 1000 Berlin und 8000 München Method for querying subscriber authorizations in a centrally controlled telephone private branch exchange
DE3432144A1 (en) * 1984-08-31 1986-03-13 Siemens AG, 1000 Berlin und 8000 München Method for a dial-up PBX system which is fitted with an operational terminal
DE3433660A1 (en) * 1984-09-13 1986-03-20 Siemens AG, 1000 Berlin und 8000 München Method for a dial-up PBX system which is fitted with an operational terminal
DE3725061A1 (en) * 1987-07-29 1989-02-09 Telefonbau & Normalzeit Gmbh Arrangement for monitoring multi-digit subscriber numbers for telecommunications exchanges, especially telephone exchanges
DE3932689A1 (en) * 1989-09-29 1991-04-11 Siemens Ag Activating telephone exchange night switch - using central memory to store allocations of switchboard positions to subscribers
DE4412562A1 (en) * 1994-04-12 1995-10-19 Siemens Ag Communication system with configured groups of ISDN B channels

Also Published As

Publication number Publication date
DE2304925B2 (en) 1975-07-10
CA992184A (en) 1976-06-29
IT978737B (en) 1974-09-20
JPS4893206A (en) 1973-12-03
DE2304925A1 (en) 1973-08-16
DE2304925C3 (en) 1980-09-11
BE795147A (en) 1973-05-29
FR2171676A5 (en) 1973-09-21

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Legal Events

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