GB1494630A - Time division switching system - Google Patents

Time division switching system

Info

Publication number
GB1494630A
GB1494630A GB1987277A GB1987277A GB1494630A GB 1494630 A GB1494630 A GB 1494630A GB 1987277 A GB1987277 A GB 1987277A GB 1987277 A GB1987277 A GB 1987277A GB 1494630 A GB1494630 A GB 1494630A
Authority
GB
United Kingdom
Prior art keywords
tone
bus
busy
signals
time division
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
GB1987277A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority claimed from US427335A external-priority patent/US3903370A/en
Priority claimed from US427339A external-priority patent/US3870826A/en
Priority claimed from US427325A external-priority patent/US3908092A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1494630A publication Critical patent/GB1494630A/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
    • H04Q11/0407—Selecting arrangements for multiplex systems for time-division multiplexing using a stored programme control

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

1494630 Automatic exchange systems WESTERN ELECTRIC CO Inc 19 Dec 1974 [21 Dec 1973 (3)] 19872/77 Divided out of 1494628 Heading H4K In a t.d.m. system including a time division bus for providing interconnections during respective time slots there is provided a tone generator and means effective during each time slot for applying to said signal generator a status signal representing the current state in a series of progressive states in the establishment of any interconnection served by the time slot, the signal generator being responsive to at least one of said status signals to apply a respective information signal to the time division bus. The system is as described in parent Specification and Specification 1,494,629 and for a description of the system reference is directed to the abridgment of the latter application. Basically the status signals are "idle", "hook check", "register request", "dial tone", "dialling", "busy", "ring" and "talk", which correspond to sub-routines of the control program, and in each time slot a decoder 1503 receives one of these signals over bus 508C from a slot address memory (Figures 3 and 5, not shown). In response to the "busy", "ring" or "dial tone" signals the decoder enables one of the amplifiers 1502A-1502C and line switch 1505 to gate the corresponding tone on to the speech bus. A fourth tone source is used for "fast busy". Integrated circuits are used for most of the components.
GB1987277A 1973-12-21 1974-12-19 Time division switching system Expired GB1494630A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US427335A US3903370A (en) 1973-12-21 1973-12-21 Line switch controller for a time division switching system
US427339A US3870826A (en) 1973-12-21 1973-12-21 Tone control system for a time division switching system
US427325A US3908092A (en) 1973-12-21 1973-12-21 Program controlled time division switching systems

Publications (1)

Publication Number Publication Date
GB1494630A true GB1494630A (en) 1977-12-07

Family

ID=27411546

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1987177A Expired GB1494629A (en) 1973-12-21 1974-12-19 Time division switching system
GB5503874A Expired GB1494628A (en) 1973-12-21 1974-12-19 Time division switching system
GB1987277A Expired GB1494630A (en) 1973-12-21 1974-12-19 Time division switching system

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB1987177A Expired GB1494629A (en) 1973-12-21 1974-12-19 Time division switching system
GB5503874A Expired GB1494628A (en) 1973-12-21 1974-12-19 Time division switching system

Country Status (8)

Country Link
JP (1) JPS5934036B2 (en)
CH (1) CH579336A5 (en)
DE (1) DE2459555C2 (en)
FR (1) FR2279295A1 (en)
GB (3) GB1494629A (en)
IT (1) IT1027831B (en)
NL (1) NL178118C (en)
SE (1) SE409072B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62108544U (en) * 1985-12-25 1987-07-10
JPH04109472U (en) * 1991-03-07 1992-09-22 いすゞ自動車株式会社 Injection pump noise suppression device
JP7411979B2 (en) 2019-07-19 2024-01-12 公立大学法人福島県立医科大学 internal standard gene

Also Published As

Publication number Publication date
NL178118C (en) 1986-01-16
SE409072B (en) 1979-07-23
GB1494628A (en) 1977-12-07
IT1027831B (en) 1978-12-20
FR2279295A1 (en) 1976-02-13
JPS5934036B2 (en) 1984-08-20
SE7415461L (en) 1975-06-23
NL178118B (en) 1985-08-16
NL7416431A (en) 1975-06-24
DE2459555C2 (en) 1985-04-04
JPS5096107A (en) 1975-07-31
CH579336A5 (en) 1976-08-31
DE2459555A1 (en) 1975-07-03
FR2279295B1 (en) 1978-12-29
GB1494629A (en) 1977-12-07

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Legal Events

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