GB1068227A
(en )
1967-05-10
Improvements in or relating to switching networks for use in telecommunications installations
GB409015A
(en )
1934-04-23
Improvements in or relating to telephone systems
GB1033094A
(en )
1966-06-15
Improvements in or relating to a method and apparatus for selecting and establishing a free transmission path through a plurality of stages of switching multiples
US3129293A
(en )
1964-04-14
Automatic telecommunication switching systems
US3020353A
(en )
1962-02-06
Arrangement for automatic telephone systems
GB944736A
(en )
1963-12-18
Improvements in or relating to communication circuit arrangements
GB737890A
(en )
1955-10-05
Improvements in or relating to automatic telecommunication exchange
SE306358B
(ref )
1968-11-25
GB1104940A
(en )
1968-03-06
Method of controlling a multi-stage crosspoint arrangement
GB1084001A
(en )
1967-09-20
Improvements in or relating to switching networks
GB571520A
(en )
1945-08-28
Improvements relating to electric selective signalling systems
GB945357A
(en )
1963-12-23
Improvements in or relating to telecommunication systems
GB817959A
(en )
1959-08-06
Switching systems applicable particularly to group selection in automatic telephony systems
GB996147A
(en )
1965-06-23
Improvements in or relating to circuit arrangements for marker-control telecommunications exchanges
US3395253A
(en )
1968-07-30
Telecommunication coordinate relay switching systems having auxiliary holding means
GB769915A
(en )
1957-03-13
Improvements in or relating to electrical connecting circuits
GB1125457A
(en )
1968-08-28
Improvements in or relating to telecommunications exchange systems
US2714629A
(en )
1955-08-02
Marking circuit
GB1167998A
(en )
1969-10-22
Improvements in or relating to Telecommunications Exchange Systems
GB1127384A
(en )
1968-09-18
Automatic telecommunications exchange
US3105223A
(en )
1963-09-24
Multiple switching circuit
GB989338A
(en )
1965-04-14
Improvements relating to electric selecting arrangements
GB1093637A
(en )
1967-12-06
Telecommunication exchange using crosspoint switches
GB787238A
(en )
1957-12-04
Trunking diagram for an automatic telecommunication system
GB1148155A
(en )
1969-04-10
Multi-stage switching network