AUTOMATIC COUPLING OF AUDIO SIGNALS FROM AN ANALOG NETWORK TO A DIGITAL NETWORK

摘要

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 circuit ry. Calls to and from a fax machine or other data device using amplitude and/or phas e modulated tones can be handled more efficiently by monitoring such incoming call s for the presence of audio control tones. Upon the detection of such tones, appropria te encoding circuitry is automatically switched in to properly encode/decode data t ones so as to permit the automatic transmission of data over a wireless cellular network using CDMA, TDMA or other digital protocols.