[Openh323-devel] t38modem not working

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Hi

I'm using t38modem version 1.0.0, opal CVS-21MAY2007 and a recent
pwlib CVS HEAD, and trying to receive a T.38 fax.

The T.38 re-invite is successful, but the analogue fax machine says
"Connecting..." for a long time and then gives up. The wireshark SIP
messages follow (t38modem has address IP 10.1.0.101, the MGC 10.1.0.14
and the MGW 10.1.0.19).

Callweaver/RxFAX seems to get a little further but also fails, however
the messages sent are different, t38modem goes no-signal -> ced then
keeps repeating no-signal -> v21-preamble, while Callweaver/RxFAX goes
no-signal -> ced -> v21-preamble -> DIS DSR:ITU-T V.27 ter, V.29, and
V.17.

Please help.

Thank you
Damjan Jovanovic

|Time     | 10.1.0.14         | 10.1.0.101        | 10.1.0.19         |
|97.737   |         INVITE SDP ( telephone-event)          |
        |SIP From: sip:10.1.0.14 To:sip:0879404999@xxxxxxxxxx
|         |(5060)   ------------------>  (5060)   |                   |
|97.741   |         100 Trying|                   |
|SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|98.234   |         200 OK SDP ( telephone-event)          |
        |SIP Status
|         |(5060)   <------------------  (32980)  |                   |
|98.234   |         ACK       |                   |
|SIP Request
|         |(5060)   ------------------>  (32980)  |                   |
|98.270   |                   |         RTP (g711A)
|RTP Num packets:56  Duration:1.100s ssrc:1839941739
|         |                   |(5000)   <------------------  (4860)   |
|98.331   |                   |         RTP (g711A)
|RTP Num packets:52  Duration:1.020s ssrc:4226038797
|         |                   |(5000)   ------------------>  (4860)   |
|99.371   |         INVITE SDP ( t38)             |
|SIP Request
|         |(5060)   <------------------  (32980)  |                   |
|99.371   |         100 Trying|                   |
|SIP Status
|         |(5060)   ------------------>  (32980)  |                   |
|99.386   |         200 Ok SDP ( t38)             |
|SIP Status
|         |(5060)   ------------------>  (32980)  |                   |
|99.390   |         ACK       |                   |
|SIP Request
|         |(5060)   <------------------  (32980)  |                   |
|99.538   |                   |         no-signal |
|t38:t30 Ind:no-signal
|         |                   |(5002)   ------------------>  (4862)   |
|99.576   |                   |         ced       |
|t38:t30 Ind:ced
|         |                   |(5002)   ------------------>  (4862)   |
|102.617  |                   |         no-signal |
|t38:t30 Ind:no-signal
|         |                   |(5002)   ------------------>  (4862)   |
|102.653  |                   |         v21-preamble
|t38:t30 Ind:v21-preamble
|         |                   |(5002)   ------------------>  (4862)   |
|102.926  |                   |         no-signal |
|t38:t30 Ind:no-signal
|         |                   |(5002)   <------------------  (4862)   |
|105.696  |                   |         no-signal |
|t38:t30 Ind:no-signal
|         |                   |(5002)   ------------------>  (4862)   |
|114.161  |                   |         v21-preamble
|t38:t30 Ind:v21-preamble
|         |                   |(5002)   ------------------>  (4862)   |
|117.199  |                   |         no-signal |
|t38:t30 Ind:no-signal
|         |                   |(5002)   ------------------>  (4862)   |
|125.664  |                   |         v21-preamble
|t38:t30 Ind:v21-preamble
|         |                   |(5002)   ------------------>  (4862)   |
|128.707  |                   |         no-signal |
|t38:t30 Ind:no-signal
|         |                   |(5002)   ------------------>  (4862)   |
|137.038  |         BYE       |                   |
|SIP Request
|         |(5060)   ------------------>  (32980)  |                   |
|137.040  |         200 OK    |                   |
|SIP Status
|         |(5060)   <------------------  (32980)  |                   |

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