GB1139740A - Improvements in or relating to automatic telephone exchanges - Google Patents

Improvements in or relating to automatic telephone exchanges

Info

Publication number
GB1139740A
GB1139740A GB5078466A GB5078466A GB1139740A GB 1139740 A GB1139740 A GB 1139740A GB 5078466 A GB5078466 A GB 5078466A GB 5078466 A GB5078466 A GB 5078466A GB 1139740 A GB1139740 A GB 1139740A
Authority
GB
United Kingdom
Prior art keywords
automatic telephone
mry
mrx
rectifiers
nov
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
GB5078466A
Inventor
Leslie James Browell
Albert Edward Page
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 GB5078466A priority Critical patent/GB1139740A/en
Publication of GB1139740A publication Critical patent/GB1139740A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

1,139,740. Party line systems. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. 6 Nov., 1967 [11 Nov., 1966], No. 50784/66. Heading H4K. In the arrangement which caters for twoparty lines in the cross-bar system described in Specification 1,102,151, and in which the idle party is prevented from intrusion on a connection by means of rectifiers MRX, MRY, one connected to the A wire, the other to the B wire (Fig. 5, of that Specification), provision is made for revertive calls by means of a ring- back relay set RBRS which is taken into use in response to an appropriate digit and which performs the usual function of ringing both parties and also operates relays RCX, RCY to shunt out the rectifiers MRX, MRY, the relays being held subsequently by feed current.
GB5078466A 1966-11-11 1966-11-11 Improvements in or relating to automatic telephone exchanges Expired GB1139740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5078466A GB1139740A (en) 1966-11-11 1966-11-11 Improvements in or relating to automatic telephone exchanges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5078466A GB1139740A (en) 1966-11-11 1966-11-11 Improvements in or relating to automatic telephone exchanges

Publications (1)

Publication Number Publication Date
GB1139740A true GB1139740A (en) 1969-01-15

Family

ID=10457326

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5078466A Expired GB1139740A (en) 1966-11-11 1966-11-11 Improvements in or relating to automatic telephone exchanges

Country Status (1)

Country Link
GB (1) GB1139740A (en)

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