[OpenSIPS-Users] T.38/Patton mediaproxy problem

[Carlo Dimaggio]

Hello,

I have a trouble with t.38 and an ATA "Patton 4022" (latest firmware).  
I'm able to send and receive fax but I see (from mediaproxy/cdrtool  
web interface) that the session still remain active at the end of the  
call...
In detail, from the point of view of opensips the call is closed (the  
BYE is forwarded immediately to radius) but it seems that mediaproxy  
doesn't recognize the end and the t-38 protocol because the session is  
only "audio" and not "audio/image" and the it is closed only for  
timeout (conntrack_timeout).
With an ATA grandstream ht-503 all is ok.

I have seen that the Patton SIP INVITE packet has less information  
than HT-503:

PATTON 4022
---
From: <sip:1002 at domain>;tag=afdd756f.
To: sip:1004 at domain;tag=ZG609-1Z1vX.
Call-ID: MTI2YzQ5NzdiYTc1ZjYyMzk3NDQxZjEzYTM4MGZkMDY..
CSeq: 3 INVITE.
Via: SIP/2.0/UDP <IP_OPENSIPS>:5060;branch=z9hG4bKfa4d.8a8ed454.0.
Via: SIP/2.0/UDP 192.168.1.100:5060;branch=z9hG4bK- 
d8754z-0d366bd8c3f37857-1---d8754z-.
Contact: PattonFax<sip:1004 at 10.0.6.52:5060>.
User-Agent: 20n/021106.
Allow: INVITE,BYE,CANCEL,OPTIONS,PRACK,NOTIFY,UPDATE,REFER.
Supported: 100rel,timer,replaces.
Record-Route: <sip:<IP_OPENSIPS>:5060;lr>.
Content-Type: application/sdp.
Content-Length: 178.
.
v=0.
o=1004 193368 2 IN IP4 10.0.6.52.
s=-.
c=IN IP4 10.0.6.52.
t=0 0.
m=image 8000 udptl t38 96.
a=rtpmap:96 telephone-event/8000.
a=T38MaxBitRate:14400.
a=T38FaxMaxBuffer:400.

--------------------------------------

HT-503
---
INVITE sip:1002 at 10.0.6.52:32794;rinstance=420214ae59ea3398 SIP/2.0.
Via: SIP/2.0/UDP 10.0.8.179:5060;branch=z9hG4bK1166079120;rport.
Route: <sip:<IP_OPENSIPS>;lr;ftag=1038838660;nat=yes;did=7a6.73428975>.
From: "HTFax" <sip:1001 at domain>;tag=1038838660.
To: <sip:1002 at domain>;tag=e9be3855.
Call-ID: 1665987500-5060-9 at 10.0.8.179.
CSeq: 82 INVITE.
Contact: <sip:1001 at 10.0.8.179:5060>.
Max-Forwards: 70.
Supported: replaces, path, timer.
User-Agent: Grandstream HT-503  V1.1B 1.0.0.15.
Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO,  
REFER, UPDATE.
Content-Type: application/sdp.
Accept: application/sdp, application/dtmf-relay.
Content-Length:   345.
.
v=0.
o=1001 8000 8001 IN IP4 10.0.8.179.
s=SIP Call.
c=IN IP4 10.0.8.179.
t=0 0.
m=image 5004 udptl t38.
a=T38FaxVersion:0.
a=T38MaxBitRate:14400.
a=T38FaxFillBitRemoval:0.
a=T38FaxTranscodingMMR:0.
a=T38FaxTranscodingJBIG:0.
a=T38FaxRateManagement:transferredTCF.
a=T38FaxMaxBuffer:400.
a=T38FaxMaxDatagram:280.
a=T38FaxUdpEC:t38UDPRedundancy.
-----------------------------


My setup is: opensips1.4.3, mediaproxy 2.3.1, cdrtool 6.7.1 and  
freeradius 1.1.7.



Anyone can explain me why I have this problem? Is a misconfiguration?



Sorry for the convoluted e-mail :-)

Thank you,

Carlo