On Apr 16, 2011, at 9:27 AM, Steve Underwood wrote: > On 04/16/2011 01:24 PM, Oguzhan Kayhan wrote: >> Hello, >> We have a sip trunk end point with cisco media gateway. >> VoIP works fine. >> But when we try to send faxes thru this trunk, we simply can not. >> >> Is there anybody experienced such problem and solved? >> How should i set sip.conf and udptl.conf. >> >> I already have t38pt_udptl=yes in sip.conf >> >> Thank you. > How old is the Cisco software? It appears they completely changed their T.38 > software platform a couple of years ago. Before that is was awful. I wasted a > lot of time, while developing my T.38 platform, hunting down problems that > turned out to be broken Ciscos. Since the new software has spread into the > field, the complaints have largely gone away.
I have the following in my dial-peers, but *KEEP IN MIND*, for calls placed to a POTS dial-peer on a Cisco, it won't do 'fax rate disable' etc.. on that side of the session if the origin doesn't match a dial peer as well, so it may be worthwhile to have a high priority (catchall) peer that has something like .T as the pattern with your catch-all parameters. PBX TIE: dial-peer voice 7700 pots answer-address 77.. destination-pattern 77.. fax rate disable port 0/0/0:23 prefix 77 ! Asterisk PEER: dial-peer voice 1000 voip preference 1 answer-address 1... destination-pattern 1... session protocol sipv2 session target ipv4:10.0.0.1 session transport udp dtmf-relay rtp-nte codec g711ulaw fax-relay ecm disable fax rate disable fax protocol pass-through g711ulaw no vad ! DID Setup: dial-peer voice 214915135 voip destination-pattern 214915135. session protocol sipv2 session target ipv4:10.0.0.1 session transport udp dtmf-relay rtp-nte codec g711ulaw fax-relay ecm disable fax rate disable fax protocol pass-through g711ulaw no vad ! dial-peer voice 1350 pots incoming called-number 214915135. fax rate disable direct-inward-dial ! -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
