On 3/02/2014 7:15 PM, Jakob-Matthias Böttger wrote: > Hi, changing > > faxdetect=cng > and > t38pt_udptl=no > > helped making it work. > Hmm, the fax will be received as an audio call rather than T.38, setting t38pt_udptl=no has turned off T.38. Do you know if your upstream provider supports T.38? Larry.