GB1158319A - Improvements in or relating to Telephone Systems. - Google Patents

Improvements in or relating to Telephone Systems.

Info

Publication number
GB1158319A
GB1158319A GB4455165A GB4455165A GB1158319A GB 1158319 A GB1158319 A GB 1158319A GB 4455165 A GB4455165 A GB 4455165A GB 4455165 A GB4455165 A GB 4455165A GB 1158319 A GB1158319 A GB 1158319A
Authority
GB
United Kingdom
Prior art keywords
junctions
wire
oct
incoming
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
GB4455165A
Inventor
John Henry Keating
Alfred John Tierney
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB4455165A priority Critical patent/GB1158319A/en
Priority to BR18385966A priority patent/BR6683859D0/en
Publication of GB1158319A publication Critical patent/GB1158319A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

1,158,319. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. 6 Oct., 1966 [21 Oct., 1965], No. 44551/65. Heading H4K. In a trunk exchange which employs 4-wire switching and which comprises on the incoming and outgoing sides high-grade 4-wire carrier junctions and high-loss and normal lowloss 2-wire junctions, the latter terminating in hybrid circuits, when incoming and outgoing junctions are interconnected, balanced currents flow over both legs of the go and return paths X, R for the purpose of contact-wetting at the selectors, and relays connected to the return path R are operative or not in response to DC leg signalling to control the insertion or removal of attenuation pads according to the connection made.
GB4455165A 1965-10-21 1965-10-21 Improvements in or relating to Telephone Systems. Expired GB1158319A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4455165A GB1158319A (en) 1965-10-21 1965-10-21 Improvements in or relating to Telephone Systems.
BR18385966A BR6683859D0 (en) 1965-10-21 1966-10-20 IMPROVEMENTS IN TELEPHONE SYSTEMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4455165A GB1158319A (en) 1965-10-21 1965-10-21 Improvements in or relating to Telephone Systems.

Publications (1)

Publication Number Publication Date
GB1158319A true GB1158319A (en) 1969-07-16

Family

ID=10433824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4455165A Expired GB1158319A (en) 1965-10-21 1965-10-21 Improvements in or relating to Telephone Systems.

Country Status (2)

Country Link
BR (1) BR6683859D0 (en)
GB (1) GB1158319A (en)

Also Published As

Publication number Publication date
BR6683859D0 (en) 1973-04-17

Similar Documents

Publication Publication Date Title
ZA792960B (en) An indirectly controlled telecommunications exchange with time channel connection paths led via time channel couplers,in particular,telephone systems
GB1084001A (en) Improvements in or relating to switching networks
GB1158319A (en) Improvements in or relating to Telephone Systems.
CH613326A5 (en) Circuit arrangement for telecommunications switching systems, in particular telephone switching systems, with switching networks and with central and partially central devices
GB996147A (en) Improvements in or relating to circuit arrangements for marker-control telecommunications exchanges
ES324839A1 (en) Circuit provision for telecommunication link installations, particularly for telephone installations, with coupling fields. (Machine-translation by Google Translate, not legally binding)
JPS54148416A (en) Multiplied transmission system
GB833933A (en) Improvements in or relating to an arrangement for effecting a selective connection between a pair of lines
GB1019480A (en) Circuit arrangement to release registers in telecommunication, particularly telephone systems
JPS55125790A (en) Switch network having connecting line inverter
ES324838A1 (en) Circuit provision for telecommunication link installations, particularly for telephone installations with coupling fields. (Machine-translation by Google Translate, not legally binding)
GB1165301A (en) Improvements in or relating to Terminating Sets, for use in Telecommunications Exchange Systems
GB1178384A (en) Improvements relating to Automatic Telecommunication Switching Systems.
JPS5673997A (en) Extension transmission restricting system
GB1480221A (en) Telephone intercommunication systems
GB1041757A (en) Improvements relating to automatic telephone exchange systems
JPS5765953A (en) Simple night transfer system
GB795699A (en) Improvements in or relating to telephone systems
GB1102480A (en) Improvements in or relating to telephone exchange systems
GB1065902A (en) Improvements to selection systems for circuits or electrical equipments
GB296424A (en) Circuit arrangement for double duty selectors in telephone installations
ES277018A1 (en) Selector system for circuits or electrical equipment (Machine-translation by Google Translate, not legally binding)
GB822319A (en) Improvements in or relating to telephone systems
GB1139793A (en) Improvements in or relating to telephone exchange systems
GB1391840A (en) Telecommunications systems

Legal Events

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