i 've update the sip.conf, set t38pt_udptl = yes .and i’ve used G729 codec passthrough.so all T38 calls was rejected.
warning as following
Dec 5 16:20:33 WARNING[2634]: chan_sip.c:3592 process_sdp: Unknown SDP media type in offer: image 18490 udptl t38
Dec 5 16:20:33 NOTICE[2634]: chan_sip.c:3706 process_sdp: No compatible codecs!
Dec 5 16:20:34 WARNING[2634]: chan_sip.c:3592 process_sdp: Unknown SDP media type in offer: image 17940 udptl t38
Dec 5 16:20:34 NOTICE[2634]: chan_sip.c:3706 process_sdp: No compatible codecs!
any body can give me suggestion .thanks …