GB1418085A - Circuit arrangement for generating prefix signals in telecommuni cation and particularly telephone systems - Google Patents

Circuit arrangement for generating prefix signals in telecommuni cation and particularly telephone systems

Info

Publication number
GB1418085A
GB1418085A GB4408873A GB4408873A GB1418085A GB 1418085 A GB1418085 A GB 1418085A GB 4408873 A GB4408873 A GB 4408873A GB 4408873 A GB4408873 A GB 4408873A GB 1418085 A GB1418085 A GB 1418085A
Authority
GB
United Kingdom
Prior art keywords
subscriber
exchange
switch
circuit arrangement
telephone systems
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
GB4408873A
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 GB1418085A publication Critical patent/GB1418085A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/53—Generation of additional signals, e.g. additional pulses

Abstract

1418085 Automatic exchange systems INTERNATIONAL STANDARD ELECTRIC CORP 20 Sept 1973 [27 Sept 1972] 44088/73 Heading H4K An exchange system includes a substation having an auxiliary switch which, when manually actuated after a connection has been made, produces in the subscriber line a loopinterruption whose duration is independent of the duration of actuation and which when received at the exchange causes a dial-signal receiver to be connected to the subscriber line. The subscriber may then make a call to a third party while the line to the original called party is held. A tone may be sent to the subscriber when the dial-signal receiver has been connected. Actuation of the switch may also generate a distinguishing signal immediately prior to the loop interruption, so that the exchange can distinguish between the latter and an interruption of the same duration caused by depression of the hook-switch.
GB4408873A 1972-09-27 1973-09-20 Circuit arrangement for generating prefix signals in telecommuni cation and particularly telephone systems Expired GB1418085A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722247239 DE2247239A1 (en) 1972-09-27 1972-09-27 CIRCUIT ARRANGEMENT FOR GENERATING POST-DIALING PULSES IN REMOTE INDICATORS, IN PARTICULAR TELEPHONE SYSTEMS

Publications (1)

Publication Number Publication Date
GB1418085A true GB1418085A (en) 1975-12-17

Family

ID=5857449

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4408873A Expired GB1418085A (en) 1972-09-27 1973-09-20 Circuit arrangement for generating prefix signals in telecommuni cation and particularly telephone systems

Country Status (2)

Country Link
DE (1) DE2247239A1 (en)
GB (1) GB1418085A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2432451C3 (en) * 1974-07-06 1981-07-02 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for the delivery of a special signal for telephone connections
DE2651210C2 (en) * 1976-11-10 1985-01-31 Friedrich Merk-Telefonbau GmbH, 8000 München Circuit arrangement for small private branch exchanges with two call stations

Also Published As

Publication number Publication date
DE2247239A1 (en) 1974-03-28

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee