Apparatus, method and software for call-waiting tone detection

Details Apparatus, method and software for call-waiting tone detection Apparatus, method and software for call-waiting tone detection

2006-07-11

2006-07-11

Woo, Stella (Department: 2643)

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

Reexamination Certificate

active

07076034

ABSTRACT:
Reliable detection of a call-waiting tone is provided by employing a correlation based technique. A modem or other device employing such a technique need not rely on carrier drop detection and is generally insensitive to other energy or noise on the line.

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