CH488366A -
Switching device for the parallel connection of two telephones to a subscriber line of a telephone system
- Google Patents
Switching device for the parallel connection of two telephones to a subscriber line of a telephone system
Info
Publication number
CH488366A
CH488366ACH278269ACH278269ACH488366ACH 488366 ACH488366 ACH 488366ACH 278269 ACH278269 ACH 278269ACH 278269 ACH278269 ACH 278269ACH 488366 ACH488366 ACH 488366A
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Publication date
Application filed by Industriselskabet Kristian KirfiledCriticalIndustriselskabet Kristian Kir
Publication of CH488366ApublicationCriticalpatent/CH488366A/en
H04M3/42—Systems providing special services or facilities to subscribers
H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Interface Circuits In Exchanges
(AREA)
CH278269A1968-02-231969-02-21
Switching device for the parallel connection of two telephones to a subscriber line of a telephone system
CH488366A
(en)