I'm trying to set my VFX line to not detect incoming DTMF tones but give me raw audio instead. I've tried setting inband in sip.conf (Asterisk 1.6) and using the SIPdtmfMode function in the dial plan, but this only results in no DTMF at all. I guess this means that Asterisk is expecting inband but VFX is still sending rcf2833. (Note, I'm already forcing G711 codec.)
Anybody got any ideas? Perhaps my line needs to be manually forced to inband at the VFX end?