Circuit arrangement for receiving digital intelligence signals i

Circuit arrangement for receiving simplex and duplex current tel

Circuit arrangement for serial data transmission

Circuit arrangement for setting up a conference call

Circuit arrangement for setting up conference calls in a digital

Circuit arrangement for suppressing outgoing-signal noises in sy

Circuit arrangement for switching a digital service channel thro

Circuit arrangement for synchronizing the units in the switching

Circuit arrangement for T.D.M. telecommunication exchange system

Circuit arrangement for telecommunications especially telephone

Circuit arrangement for telecommunications exchanges

Circuit arrangement for testing parts of a digital time-division

Circuit arrangement for testing the operability of the data tran

Circuit arrangement for the control of the transmission of digit

Circuit arrangement for the indication of loop closure during th

Circuit arrangement for the synchronization of a digital subscri

Circuit arrangement for the transmission of communication signal

Circuit arrangement for time division multiplex data transmissio

Circuit arrangement for time division multiplex data transmissio

Circuit arrangement for time-division multiplex telecommunicatio