Communication system signaling circuit

Details Communication system signaling circuit Communication system signaling circuit

H - Electricity

04

M

379/67

H04M 7/00 (2006.01) H04M 19/02 (2006.01) H04Q 3/42 (2006.01)

Patent

CA 1159975

MUSSMAN-3 COMMUNICATION SYSTEM SIGNALING CIRCUIT Abstract of the Disclosure 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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