Patent ID: 8538397

Claim:
A method enabling a system to transmit signals representing data to and from a wireless handheld telephony device through an audio channel of a communication session previously established between the wireless handheld telephony device and at least one second telephony device, the system comprising a gateway having a data processor, media readable by the data processor and a communications subsystem, the communications subsystem adapted to process signals representing communications by and between the wireless handheld telephony device, the at least one second telephony device and a call control server via the gateway, the communication session being controlled by the call control server, the communication session having a first call leg between the wireless handheld telephony device and the gateway and at least a second call leg between the at least one second telephony device and the gateway, and the media readable by the data processor comprising coded program instructions to cause the data processor to carry out the method, the method comprising: upon receipt of modulated control signals representing one or more data messages from the call control server, temporarily establishing a third call leg between the gateway and a modem device in communication with the call control server; receiving, at the gateway, the modulated control signals from the call control server via the established third call leg with the modem device; transmitting the modulated control signals to the wireless handheld telephony device through the audio channel of the first call leg; upon receipt of modulated response signals representing one or more data messages from the wireless handheld telephony device, transmitting the modulated response signals to the modem device via the established third call leg; and when the modulated control signals have been sent and the modulated response signals have been received, disconnecting the third call leg.