Call waiting signal arrangement

H - Electricity – 04 – M

Patent

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379/16

H04M 3/02 (2006.01) H04M 3/42 (2006.01) H04M 3/428 (2006.01) H04Q 3/00 (2006.01)

Patent

CA 1149089

TITLE CALL WAITING SIGNAL ARRANGEMENT ABSTRACT OF THE DISCLOSURE A telephone call waiting signal system as used in a processor controlled exchange, wherein reuse is made of an existing ringing supply bus and the signal relay in each subscriber's line equipment for applying a call waiting signal to the subscriber's line. The is made possible by the multiplexing of the two signals and selectively operating the signal relay at the line equipment.

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