Voice to digital fax transmission

Claim 1

A code division multiple access (CDMA) communication network base station that is coupled to receive calls from a landline telephone network, comprising: a first transceiver for communicating with an external device; a second transceiver for transmitting and receiving wireless communication signals; and circuitry adapted to cause the base station to interpret any of a set of received signals to convert a voice call to a digital fax call whenever a fax device connected to one of the landline telephone network and a mobile station generates a part of the set of received signals, the set of received signals including: a service option (SO) specifying voice; a calling tone (CG) received by way of the landline telephone network; and a service option (SO) specifying digital fax; said circuitry also being adapted to generate and transmit a set of signals to both the mobile station and the base station according to which one is receiving a fax from a digital fax, said set of signals for transmission including: radio link protocol signals for transmission to an external fax coupled to the landline telephone network; point-to-point protocol signals; internet protocol signals; an AT+FCLASS2.0 signal to set CLASS2.0 fax service; an AT+CFG=( ) signal to set the configuration to a null string; and an ATA signal to instruct the mobile station to receive the incoming call from the landline telephone network.

Claim 3

A method in a mobile station, comprising the steps of: setting up a voice only call in an IS-95 compatible mobile station; setting a service negotiation signal (SO) equal to voice; receiving from a base station over a wireless link, after a voice call is setup, one of an SO signal set equal to digital fax or a CNG tone passed through the base station, the CNG tone having been transmitted by a digital fax device coupled to the base station by way of a landline telephone network; setting up a digital fax call; receiving digital fax signals from the base station over the wireless link; receiving an AT+CFG=″″ signal from a digital fax device and transmitting the AT+CFG=″″ signal to the base station wherein the AT+CFB=″″ signal is a configuration signal with a null string; receiving and interpreting an AT+FCLASS2.0 signal from the digital fax device; receiving and interpreting an AT+CRM=0 signal from the digital fax device; transmitting, to the digital fax device, a RING result code signal; and transmitting over a digital communication line to a digital fax device, the received digital fax signal, in a digital fax protocol.

Claim 4

A method in a mobile station, comprising the steps of: setting up a voice only call in an IS-95 compatible mobile station; setting a service negotiation signal (SO) equal to voice; receiving from a base station over a wireless link, after a voice call is setup, one of an SO signal set equal to digital fax or a CNG tone passed through the base station, the CNG tone having been transmitted by a digital fax device coupled to the base station by way of a landline telephone network; setting up a digital fax call; receiving digital fax signals from the base station over the wireless link; receiving an AT+CFG=″″ signal from a digital fax device and transmitting the AT+CFG=″″ signal to the base station wherein the AT+CFB=″″ signal is a configuration signal with a null string; receiving and interpreting an AT+FCLASS2.0 signal from the digital fax device; receiving and interpreting an AT+CRM=0 signal from the digital fax device; transmitting, to the digital fax device, a RING result code signal; and transmitting over a digital communication line to a digital fax device, the received digital fax signal, in a digital fax protocol.