Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1995-12-18
1999-07-06
Cumming, William
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
379201, 370 601, H04Q 738
Patent
active
059208252
ABSTRACT:
A cellular modem pool provides a "transparent call progress" feature where each modem pair of the cellular modem pool is coupled to a cross-connect switch, which communicates call progress information between the cellular-side and the PSTN-side during data call setup. The modem pair of the cellular modem pool monitors the call progress information for a data signal provided by a DCE of the calling party, e.g., a predefined fax calling tone. Once the fax calling tone is detected, the modem pair prohibits the opening of the connection provided by the cross-connect switch. This enables the transparent call progress feature for the duration of the fax call thereby routing the fax call around the modem pair.
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Patel Satya A.
Rasmussen Kris A.
Cumming William
Paradyne Corporation
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