GB1134908A - Selective ringing in a telephone system - Google Patents

Selective ringing in a telephone system

Info

Publication number
GB1134908A
GB1134908A GB4764667A GB4764667A GB1134908A GB 1134908 A GB1134908 A GB 1134908A GB 4764667 A GB4764667 A GB 4764667A GB 4764667 A GB4764667 A GB 4764667A GB 1134908 A GB1134908 A GB 1134908A
Authority
GB
United Kingdom
Prior art keywords
oct
telephone system
parties
selective ringing
sending
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
GB4764667A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1134908A publication Critical patent/GB1134908A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Abstract

1,134,908. Automatic exchange systems. INTERNATIONAL STANDARD ELECTRIC CORP. 19 Oct., 1967 [27 Oct., 1966], No. 47646/67. Heading H4K. In an exchange employing audio-frequency key sending, a substation which is shared by a number of parties is provided, in addition to the normal A.C. ringer W, with ringers FH1, FH2 which, by means of tuned circuits #1, f2, may be operated in response to different frequencies sent by the caller when he wishes to call particular parties. Two-frequency code sending may be employed.
GB4764667A 1966-10-27 1967-10-19 Selective ringing in a telephone system Expired GB1134908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1966ST026036 DE1291386B (en) 1966-10-27 1966-10-27 Circuit arrangement for controlling a specific one of several call organs with a single connection of a telecommunication system, in particular a telephone system

Publications (1)

Publication Number Publication Date
GB1134908A true GB1134908A (en) 1968-11-27

Family

ID=7460815

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4764667A Expired GB1134908A (en) 1966-10-27 1967-10-19 Selective ringing in a telephone system

Country Status (5)

Country Link
AT (1) AT285684B (en)
CH (1) CH470812A (en)
DE (1) DE1291386B (en)
GB (1) GB1134908A (en)
NO (1) NO121792B (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1153426B (en) * 1960-12-20 1963-08-29 Inst Post Und Fernmeldewesen B Circuit arrangement for community lines without internal traffic

Also Published As

Publication number Publication date
NO121792B (en) 1971-04-13
CH470812A (en) 1969-03-31
AT285684B (en) 1970-11-10
DE1291386B (en) 1969-03-27

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