GB1313752A - Private automatic branch exchanges - Google Patents

Private automatic branch exchanges

Info

Publication number
GB1313752A
GB1313752A GB1313752DA GB1313752A GB 1313752 A GB1313752 A GB 1313752A GB 1313752D A GB1313752D A GB 1313752DA GB 1313752 A GB1313752 A GB 1313752A
Authority
GB
United Kingdom
Prior art keywords
alarm
extensions
extension line
exchange
premises
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
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of GB1313752A publication Critical patent/GB1313752A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech
    • 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

Abstract

1313752 Automatic exchange systems GENERAL ELECTRIC CO Ltd 14 May 1970 [14 Feb 1969] 8137/69 Heading H4K A P.A.B.X. has special provision for an automatic alarm message sender. The arrangements described relate to a P.A.B.X. with pushbutton extensions, selective calling of other extensions by the application of different combinations of terminations to an extension line wires and dialling out to a public exchange using dial pulse or multi-tone sending by means of a signal converter including a storage device. The number to be transmitted is stored in the store and read out in the event of an alarm in response to operation of a changeover switch operated by dry reed contacts set in doors or windows or heat or smoke sensing devices and which cause an extension line to be connected to the register. A burglar alarm system on the premises served by the private exchange may be set off by a tone signal originating from the police station following an alarm call at the request of a radio equipped police officer already at the premises.
GB1313752D 1969-02-14 1969-02-14 Private automatic branch exchanges Expired GB1313752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB813769 1969-02-14

Publications (1)

Publication Number Publication Date
GB1313752A true GB1313752A (en) 1973-04-18

Family

ID=9846463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1313752D Expired GB1313752A (en) 1969-02-14 1969-02-14 Private automatic branch exchanges

Country Status (1)

Country Link
GB (1) GB1313752A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236878A2 (en) * 1986-03-08 1987-09-16 Telenorma Gmbh Small private telephone exchange, especially a key telephone exchange
FR2631187A1 (en) * 1988-05-09 1989-11-10 Electricite De France Specialised virtual telephone link equipment and private automatic switching centre applying same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236878A2 (en) * 1986-03-08 1987-09-16 Telenorma Gmbh Small private telephone exchange, especially a key telephone exchange
EP0236878A3 (en) * 1986-03-08 1989-08-23 Telenorma Telefonbau Und Normalzeit Gmbh Small private telephone exchange, especially a key telephone exchange
FR2631187A1 (en) * 1988-05-09 1989-11-10 Electricite De France Specialised virtual telephone link equipment and private automatic switching centre applying same

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees