Voiceband/modem signal relay
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United States of America Patent
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Aug 13, 2002
Grant Date -
N/A
app pub date -
Oct 31, 1997
filing date -
Oct 31, 1997
priority date (Note) -
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Abstract
A relay device associated with each end point modem in a data communication network provides a system for transporting data over a communication channel employing voice compression. Each relay device exchanges relevant parameter information with its associated modem and with each other in order to negotiate compatible data transfer conditions. The protocol exchange between each relay and its associated modem will typically include the calculation of inter-loop delay values for echo cancellation and line probing for line equalization or bandwidth optimization. Supported data rates, modulation type and encoding information is also exchanged. The invention provides a system for full duplex transmission of data over modems while saving on bandwidth because of voice compression techniques.
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