Centrifugal brake, especially for pulse generators in self-dialing systems
DE1234275B
Circuit arrangement for advancing charge indicators at telecommunication, in particular telephone stations
DE1211279B
Circuit arrangement for monitoring individual multi-digit codes in telecommunication systems, in particular telephone branch systems
DE1240922B
Circuit arrangement for generating bounce-free pulses
DE1228671B
Circuit arrangement for recognizing a loop asymmetry
DE1233445B
Circuit arrangement for a relayless subscriber circuit
DE1215215B
Electronic follow-up mechanism for monitoring single-digit and multi-digit codes in telecommunications, in particular telephone extension systems, represented by pulse trains
DE1228675B
Circuit arrangement for receiving and forwarding loop current changes from connection lines in telecommunication systems, in particular telephone line systems with locking devices
DE1233025B
Circuit arrangement for partially electronic small private branch exchanges with an exchange line and an internal connection network
DE1214747B
Telephone toll meter
DE1217457B
Circuit arrangement for switching on and off electromagnetic display elements at operator stations of telecommunication systems, in particular telephone systems
DE1225711B
Circuit arrangement for the transmission of ringing current by means of number switch actuation
DE1238965B
Circuit arrangement for an electronically controlled telephone exchange
DE1216945B
Circuit arrangement for advancing fee counters located at subscriber stations of telephone systems
DE1213005B
Device for recording and reproducing telephone dialing pulses on a cylindrical recording medium
DE1232612B
Monostable multivibrator
DE1202839B
Circuit arrangement for the delayed forwarding of signals in electronically controlled telecommunications switching systems, in particular telephone branch exchange systems
DE1210460B
Circuit arrangement for relay couplers in telecommunications, especially telephone systems
DE1228315B
Circuit arrangement for telephone PBXs with several intercom stations that can be connected to the same line
