Automatic coupling of audio signals from an analog network...

Details Automatic coupling of audio signals from an analog network... Automatic coupling of audio signals from an analog network...

H - Electricity

04

L

H04L 5/02 (2006.01) H04M 11/06 (2006.01) H04N 1/00 (2006.01) H04Q 7/22 (2006.01)

Patent

CA 2249693

In a digital cellular communications network, calls to and from a fax machine or other data equipment coupled to a digital phone require special encoding circuitry. Calls to and from a fax machine or other data device using amplitude and/or phase modulated tones can be handled more efficiently by monitoring such incoming calls for the presence of audio control tones. Upon the detection of such tones, appropriate encoding circuitry is automatically switched in to properly encode/decode data tones so as to permit the automatic transmission of data over a wireless cellular network using CDMA, TDMA or other digital protocols.

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