GB992642A - System for affording automatic access to exchange lines for pmbx extensions - Google Patents

System for affording automatic access to exchange lines for pmbx extensions

Info

Publication number
GB992642A
GB992642A GB619/62A GB61962A GB992642A GB 992642 A GB992642 A GB 992642A GB 619/62 A GB619/62 A GB 619/62A GB 61962 A GB61962 A GB 61962A GB 992642 A GB992642 A GB 992642A
Authority
GB
United Kingdom
Prior art keywords
extensions
pmbx
jan
operator
automatic access
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
GB619/62A
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.)
Ericsson Telephones Ltd
Original Assignee
Ericsson Telephones 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 Ericsson Telephones Ltd filed Critical Ericsson Telephones Ltd
Publication of GB992642A publication Critical patent/GB992642A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

992,642. Automatic exchange systems. ERICSSON TELEPHONES Ltd. Jan. 8, 1962 [Jan. 13, 1961], No. 619/62. Heading H4K. In a PBX wherein each exchange line 12 terminates in a switch 24 giving access to the various extensions, a calling subscriber, on lifting his receiver, is connected automatically to an idle exchange line by the application of a marking to a switch 24 allotted by a common circuit 30. Incoming calls are set up in a similar way by an operator in response to a marking applied by her ringing key. By actuating a pushbutton a subscriber may call the operator who then sets up the desired local or outgoing call. The switches 24 may be rotary as indicated, or may be of the relay type. Detailed circuits are described.
GB619/62A 1961-01-13 1962-01-08 System for affording automatic access to exchange lines for pmbx extensions Expired GB992642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA61135 1961-01-13

Publications (1)

Publication Number Publication Date
GB992642A true GB992642A (en) 1965-05-19

Family

ID=25560565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB619/62A Expired GB992642A (en) 1961-01-13 1962-01-08 System for affording automatic access to exchange lines for pmbx extensions

Country Status (1)

Country Link
GB (1) GB992642A (en)

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