Digit transmission over wireless communication link

A wireless communication unit comprising:

• a subscriber port;
• a subscriber interface connected to the subscriber port, the subscriber port comprising a tone detector and a timer;
• a radio transceiver;
• and
• a controller connected to the radio, the controller to cause a wireless connection be established between the radio transceiver and a base station in response to a call request from a non-wireless unit connected to the subscriber interface, wherein:
• a repetitive time frame is generated at a base station and a plurality of time slots are generated in the repetitive time frame, with one of the plurality of time slots being assigned to the wireless communication unit for communication with the base station;
• call information is transmitted between a non-wireless unit and the base station using the wireless communication unit as an intermediary;
• dual-tone multi-frequency (DTMIF) tones are received at the wireless communication unit from the non-wireless unit;
• for each of the DTMF tones, the wireless communication unit formats a plurality of direct transfer application part (DTAP) messages to indicate the start and the end of the DTMF tone;
• the wireless communication unit transmits the plurality of DTAP messages to the base station and the plurality of DTAP messages are conveyed from the base station to a remote location;
• and
• the DTAP messages are translated back into DTMF tone signals at the remote location.

A machine-readable medium having stored thereon data representing sequences of instructions that, when executed by a processor, cause the processor to perform operations comprising:

• generating a repetitive time frame at a base station;
• generating a plurality of time slots in the repetitive time frame;
• assigning one of the plurality of time slots on demand to a wireless
• communication unit for communication with the base station;
• establishing a call between the wireless communication unit and the base station;
• transmitting and receiving call information between a non-wireless unit and the base station using the wireless communication unit as an intermediary;
• during the call, receiving dual-tone multi-frequency (DIMIF) tones at the wireless communication unit from the non-wireless unit;
• for each of the DTMF tones, formatting a plurality of direct transfer application part (DTAP) messages indicating the start and the end of the DTMF tone;
• for each of the DTMF tones, transmitting the plurality of DTAP messages from the wireless communication unit to the base station;
• conveying the DTAP messages from the base station to a remote location;
• and translating the DTAP messages back into DTMF tone signals at the remote location.