GB8610039D0
(en )
1986-05-29
Increasing number of call options in telephone system
GB2102247B
(en )
1985-07-03
Packet and voice telecommunication switching system
DE3268093D1
(en )
1986-02-06
Improvement to public telephony method and apparatus employing selector-equipped normal and trunk call sets
KR950014543B1
(en )
1995-12-05
Echoelimination and euqalization of telecommunication
GB2206016B
(en )
1991-03-27
Telephone terminal equipment
GB8527696D0
(en )
1985-12-11
Preventing outgoing call from telephone
GR870946B
(en )
1987-06-25
Telephone call simulation system setting up and expansion of telecommunication switchboard
GB8828363D0
(en )
1989-01-05
Method of operating radio telephone system
DE3565353D1
(en )
1988-11-03
Peritelephone system for telephone set and peritelephone pieces of apparatus
GB2173974B
(en )
1988-09-07
Method of testing telephone subscribers lines
HU9300145D0
(en )
1993-04-28
Cellular telephone system of enlarged cells
GB2161044B
(en )
1988-01-27
Telephone subscribers circuits
GB2191911B
(en )
1990-08-01
Telephone bell ringer
GB2183423B
(en )
1989-10-04
Telephone tone caller
GB2168876B
(en )
1988-12-29
Multi-line telephone communications system
GB8919123D0
(en )
1989-10-04
Telephone dialling system
GB2204761B
(en )
1991-04-17
Telephone system and terminal
GB8921969D0
(en )
1989-11-15
Telephone call initiating system
GB8713757D0
(en )
1987-07-15
Control system of telephone exchanges
IL71135A0
(en )
1984-06-29
Telephone switching system and method of operating same
KR900011227A
(en )
1990-07-11
Test method of subscriber line and circuit of switching system
KR890023798U
(en )
1989-12-04
Branch terminal of telephone line
HUT44882A
(en )
1988-04-28
Method and circuit arrangement for increasing call safety of push-button telephone sets of mfc system
IL83933A0
(en )
1988-02-29
Method and system of telecommunication
IL83932A0
(en )
1988-02-29
Method and system of telecommunication