The constants below are associated with the media handling properties and requirements of modems, call requests, and incoming discriminators.
AUDIO 0x08 for use with speech synthesis
DATAMODEM 0x10 for data transfer
The constants below are also defined, although the Modem Manager has no specific support for them.
UNKNOWN 0x02
VOICE 0x04
G3FAX 0x20
Additional control properties associated with call handling are:
NEED_DTMF 0x1000 enable receipt of DTMF tones when handling an audio call
DTMF_STOPS_SPEECH 0x2000 received DTMF tones interrupt speech