Communication system signaling circuit

Details Communication system signaling circuit Communication system signaling circuit

1980-01-31

1982-10-12

Brown, Thomas W.

179 16F, 179 18HB, 179 18J, H04M 176, H04M 1902

Patent

active

043540627

ABSTRACT:
A telephone switching system is disclosed which includes a digitally controllable multifunction signaling circuit responsive to commands from a central processor to generate or to receive subscriber line pulse signals of amplitude and duration specified by the processor commands. A bridge switch amplifier arrangement having an essentially constant voltage input signal and pulse width modulated control, is used to provide a substantially constant amplitude output signal. A two-stage access switch allows the signaling circuit to be time-shared among groups of subscriber lines.

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