BE597188A
(en )
1961-03-15
Telephone switching system.
AT285689B
(en )
1970-11-10
Centrally controlled switching system for telecommunications, in particular telephone technology
NL142556B
(en )
1974-06-17
TELEPHONE SWITCHING SYSTEM WITH PBX CENTRALS.
DK107236C
(en )
1967-05-08
Distribution field for connecting switching means groups in a telecommunication system, in particular a telephony system.
CH484580A
(en )
1970-01-15
Centrally controlled telecommunication system, in particular telephone switching system
CH405433A
(en )
1966-01-15
Switching arrangement in an automatic telecommunication system, in particular a telephone system
CH353408A
(en )
1961-04-15
Circuit arrangement for subscriber station in telecommunication systems, in particular telephone systems, with keypad selection
CH374104A
(en )
1963-12-31
Telecommunication system with relay-free subscriber line circuits
AT281136B
(en )
1970-05-11
Time division multiplex telecommunications, in particular telephone switching systems
CH454232A
(en )
1968-04-15
Route search network in multi-level telecommunication systems, in particular telephone switching systems
CH482371A
(en )
1969-11-30
Switching processes for telecommunications switching systems, in particular telephone branch exchanges
CH492370A
(en )
1970-06-15
Centrally controlled telecommunication switching, in particular telephone switching system
DK111756B
(en )
1968-10-07
Electrical switching network for establishing telecommunication connections.
CH415761A
(en )
1966-06-30
Switching device for telecommunication systems, in particular telephone systems
CH351306A
(en )
1961-01-15
Automatic switchgear, in particular for dialing levels in telecommunications systems
CH381285A
(en )
1964-08-31
Circuit arrangement for switching subscribers' connections in a self-dialing system, in particular in a telephone system
CH374102A
(en )
1963-12-31
Coordinate multiple switches for telecommunications, in particular telephone switching systems
AT285690B
(en )
1970-11-10
Centrally controlled switching system for telecommunications, in particular telephone technology
DK97236C
(en )
1963-11-04
Warehouse for registering the available or busy state of links in switching networks in telecommunication exchanges.
CH367215A
(en )
1963-02-15
Circuit arrangement for receiving audio-frequency control signals in telecommunications, in particular telephone systems
CH356498A
(en )
1961-08-31
Double coincidence circuit for telecommunication systems, in particular telephone systems
DK101992C
(en )
1965-06-21
Connecting equipment, in particular for telephone systems.
CA533784A
(en )
1956-11-27
Subscribers line circuits in telecommunication systems
AT289207B
(en )
1971-04-13
Switching arrangement for intermediate distributors used in telecommunications switching systems, in particular telephone switching systems
AT198801B
(en )
1958-07-25
Machine breaker for setting step-by-step rotary selectors in telecommunication systems, in particular telephone systems