GB1546604A
(en )
1979-05-23
Radio communication systems
JPS5339807A
(en )
1978-04-12
Cellular mobile radio communication system
JPS5384603A
(en )
1978-07-26
Digital information transmitting system for radio communication network mobile subscriber
JPS5683145A
(en )
1981-07-07
Power line carrier communication system
JPS5271917A
(en )
1977-06-15
Polyphase power distribution network power line carrierfrequency communication system
JPS52143702A
(en )
1977-11-30
System for directly connecting aid of telephone circuit networks
AU5031579A
(en )
1980-02-28
Mobile telephone channel exchange system
JPS5246712A
(en )
1977-04-13
Limited space radio communication system
JPS5555650A
(en )
1980-04-23
Telephone communication system
EP0259683A3
(en )
1989-04-26
Terminal station of a radio communication network capable of effectively using radio channels assigned to the network
ZA757770B
(en )
1976-11-24
Multi station telephone switching system
JPS526004A
(en )
1977-01-18
Amplifier circuit for telephone network
JPS5394718A
(en )
1978-08-19
Circuit used for coupling time division multiplex communication system in every channel at receiving terminal of multiiframe format transmission
GB1538774A
(en )
1979-01-24
Simultaneous telecommunication between radio stations
SE7317372L
(hu )
1975-06-23
GB1546046A
(en )
1979-05-16
Transmitting and receiving circuit for subscriber telephone sets
AU500785B2
(en )
1979-05-31
Phase sync of transit station in digital communication network
CA1004784A
(en )
1977-02-01
Ringer power generator circuit for subscriber carrier station terminal
CA1012267A
(en )
1977-06-14
Ringing generator for carrier telephone station terminal
HU172637B
(hu )
1978-11-28
Ehlektroskhema dlja prisoedinenija radiostancij s telefonnymi i telegrafnymi kanalami sistemy mestnoj batarej k telefonnoj seti sistemy centralnoj baterej
JPS5210019A
(en )
1977-01-26
Electronic communication terminal system
JPS51144108A
(en )
1976-12-10
Circuit for connecting two parts of communication channel
GB1543832A
(en )
1979-04-11
Packet switching system for data communication
JPS5531311A
(en )
1980-03-05
Direct trunk setting system for multi-channel radio communication system
JPS5411606A
(en )
1979-01-27
Radio communication system