Low power dialer

Details Low power dialer Low power dialer

H - Electricity

04

M

H04M 1/274 (2006.01) H04M 1/2745 (2006.01)

Patent

CA 2270039

A telephone dialer for connection to a public switched telephone network (PSTN) and to a station apparatus, for receiving digits dialed from the station apparatus and for adding digits or substituting digits for the dialed digits and for redialing digits to the PSTN wherein the redialed digits are comprised of the dialed and added digits or comprised of substituted digits, the dialer further comprising an adjustable hold circuit for connection to the PSTN during an interval when the redialed digits are being output, for holding a line associated with the PSTN in an offhook condition, the adjustable hold circuit having a load connectable to the PSTN line which is variable with PSTN line voltage at the dialer such as to draw a variable current sufficient to meet predetermined current and voltage criteria of the line at the dialer.

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