forzageta Posted October 22, 2010 Report Share Posted October 22, 2010 Hello, I'm testing T38 for my service provider. My information technology is: I have a PBX MD110 connected to a GW (Cisco or Teldat) , I have to configure the GW with dial-peers voice pots and sip for routing the inbound calls for the PBX and the inbound calls of the NGN Network. I´m testing fax T38 now, and i send faxes from my PBX to NGN Network by SIP correctly but i don´t receive faxes to the fax of the PBX from NGN Network I have two PCs with software called VentaFax & Voice which simulate two FAXs I have captured with Wireshark: TrazaFAX is a bad trace, from fax out of my PBX to fax of my PBX. The fax call falls because i think the fax out my PBX doesn´t transmit anything I´m in Europe , i changed the codec to G711alaw (although the trace is with G711ulaw) , and i also changed the PCs from one extreme to the other just in case the problem was the modem of the PC Can anybody help me with the call trace? Thanks Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted October 22, 2010 Report Share Posted October 22, 2010 From the trace it looks like the PBX does not pass the Re-INVITE to the other side. Seems there is something special in the call flow. Can you upload a PCAP (filtered for SIP should be enough)? Quote Link to comment Share on other sites More sharing options...
forzageta Posted October 22, 2010 Author Report Share Posted October 22, 2010 Thanks, I attach you the file inside .zip I have other trace of a call OK done from my PBX to the net if you need it. trazafaxfallida.zip Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted October 22, 2010 Report Share Posted October 22, 2010 I have other trace of a call OK done from my PBX to the net if you need it. Are you sure the PBX is involved? I can't spot a User-Agent string with something that looks like the PBX... Quote Link to comment Share on other sites More sharing options...
forzageta Posted October 22, 2010 Author Report Share Posted October 22, 2010 My Fax send an image in a call through my PBX , this call goes to my Gw through primary ISDN, the GW has a SIP SERVER (10.10.75.80) and signals against a SIP SERVER of the NGN Network (194.179.10.3) and routes the call with T.38. In this sense , the call is OK and i receive the FAX in the other side but when the call is originated by the fax of the NGN Network, i see the call in my GW and i see that two faxes comunicate but however the ouside fax don´t transmit the image. Monday, i can send you the good trace in sense PBX- outside Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted October 22, 2010 Report Share Posted October 22, 2010 Oh, okay. That sounds like a complex setup. Try to catch the traffic on the PBX, then we can see if there is something going wrong. Quote Link to comment Share on other sites More sharing options...
forzageta Posted October 25, 2010 Author Report Share Posted October 25, 2010 I send you the good trace in the sense PBX-outside to make a comparison. I can´t capture the traffic in the PBX because it depends on other group. trazafaxOkay.zip Quote Link to comment Share on other sites More sharing options...
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