GB2023969A
(en )
1980-01-03
Communication system conferencing arrangement
SE7603615L
(sv )
1976-10-11
Forfarande och apparat for automatisk forbindning av tva telefonabonnenter
GB2023970A
(en )
1980-01-03
Communication system optimized pooled line arrangement
BE858001A
(fr )
1977-12-16
Disposition de circuit pour un systeme telephonique d'interphone
NL7806010A
(nl )
1978-12-05
Kabeltelevisiestelsel met afschakelbare abonneeaanslui- tingen.
GB2006574A
(en )
1979-05-02
Method of and Device for Jointly Transmitting Telephone and Video Signals on Digital Telephone Lines
SE8104437L
(sv )
1983-01-18
Automatisk abonnentvexelanordning
AU459087B2
(en )
1975-02-26
Supervisory lamp system for telephone conference connection and call transfer devices
DK372084A
(da )
1984-07-31
Fremgangsmaade til informationsoverfoering i et digitalt telekommunikationsnet samt telekommunikationsanlaeg til saadan overfoering
JPS5421217A
(en )
1979-02-17
Automatic response unit
JPS53114306A
(en )
1978-10-05
Inter-office call-back system
JPS53116023A
(en )
1978-10-11
Facsimile communication system for private branch
JPS537105A
(en )
1978-01-23
Transmission relay exchange system for aural and facsimile signals
JPS51117807A
(en )
1976-10-16
Incoming transfer service system
JPS5422705A
(en )
1979-02-20
Extension subscriber calling system
FR2420887A1
(fr )
1979-10-19
Equipement de raccordement a une ligne circulaire d'un poste telephonique destine a une installation d'intercommunication-interphonie
JPS51117808A
(en )
1976-10-16
Incoming call transfer service system
SE8102381L
(sv )
1981-10-23
Universell snabbtelefonapparat
JPS5342508A
(en )
1978-04-18
Automatic test system for telephone lines
GB1032966A
(en )
1966-06-15
Private automatic branch exchanges
SE8102382L
(sv )
1981-10-17
Elektronisk snabbtelefonanleggning
JPS5438710A
(en )
1979-03-23
Terminating call connection system for automatic private branch exchange
JPS53101909A
(en )
1978-09-05
Delay call transfer system of automatic exchange
CA848520A
(en )
1970-08-04
Combination conference connection and call transfer device for telephone subscriber lines
FR2455413A1
(fr )
1980-11-21
Dispositif concentrateur-deconcentrateur