Patent ID: 6101398
Filing Date: 2000-08-08
Classification: H04W

Abstract:
A mobile communications system, comprising:a dual mode analog/digital-mobile telephone supporting a digital traffic channel radio link protocol for data/fax communication;a dual mode interface for interconnecting a piece of data terminal equipment and the dual mode analog/digital mobile telephone, the dual mode interface including a logical analog interface and a logical digital interface, wherein the logical analog interface supports a modem implementing an enhanced analog voice channel cellular modem protocol for data/fax communication;a mobile communications network supporting set-up of a mobile communication with the dual mode analog/digital mobile telephone over an analog air interface including at least one analog voice channel and a digital air interface including at least one digital traffic channel;a modem pool within the mobile communications network operable to terminate the enhanced analog voice channel cellular modem protocol;an interworking function within the mobile communications network operable to terminate the digital traffic channel radio link protocol; andmeans within the mobile communications network responsive to the mobile communications set-up of a data/fax call to or from the dual mode analog/digital mobile telephone for seizing the modem pool for that set-up call if the data/fax call is carried over an analog voice channel of the analog air interface and for seizing the interworking function for that set-up call if the data/fax call is carried over a digital traffic channel of the digital air interface.