Apparatus and method for encoding telephone ringing signals

Details Apparatus and method for encoding telephone ringing signals Apparatus and method for encoding telephone ringing signals

H - Electricity

04

M

379/16

H04M 3/02 (2006.01) H04M 19/02 (2006.01)

Patent

CA 2023789

Abstract of the Disclosure A telephone signaling apparatus (108, 109) and method provides pleasant and quickly distinguishable call destination information and call origin information signals within the same audible ringing pattern (301). The ring pattern is partitioned into two segments with the first segment (302) used to provide the call destination information and the second segment (310) used to provide the call origin information. Within the first segment, call destination information is encoded by time division multiplexing different audio frequencies into fixed subsegments interrelated as part of a melodic contour pattern. Within the second segment, call origin information is encoded by varying the number of occurrences of a single frequency audio signal pulse which is syncopated to the melodic contour pattern provided by the different audio frequencies in the first segment.

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