Transmission bridge

5-4-280

In telephony, a device primarily intended to permit the through transmission of audio frequency currents whilst preventing the through transmission of d.c. signals.

Note: The bridge may have other functions such as the control of the holding, supervision and release of a connection. It may also feed microphone current to the telephone instrument.

Reference: I.E.C.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

English