<div>I think its the missing Contact in MERA's 200 OK to Asterisk's RE-INVITE. Contact is mandatory in 2XX responses.</div>
<div> </div>
<div>Raj<br><br> </div>
<div><span class="gmail_quote">On 4/2/07, <b class="gmail_sendername">Litnitchii Alexandr</b> <<a href="mailto:sasha@asterisk-support.ru">sasha@asterisk-support.ru</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hi all.<br>I have an issue sending/receiving faxes in next environment:<br>PSTN <-> Cisco (t.38 origination) <-> Mera (
t.38 pass-through) <a href="http://1.1.1.1">1.1.1.1</a><br><-> <a href="http://2.2.2.2">2.2.2.2</a> Asterisk-1.4.2 (t.38 pass-through) <a href="http://10.7.8.254">10.7.8.254</a> <-><br><a href="http://10.7.8.125">
10.7.8.125</a> Linksys SPA2100 (t.38 termination).<br>There is a detailed log with sip messages debug in attachment. The<br>summary of the issue is that call is answered, then Asterisk sends to<br>Mera INVITE with m=image in SDP. Mera answers OK also with m=image, and
<br>some other parameters. Right after that Asterisk sends BYE to Mera, and<br>i cannot understand the reason for that. Is that a bug?<br><br>I can suppose here 2 reasons:<br><br>1. missing Contact: header in Mera's OK reply ( line number 601 )
<br><br><br>2. Different T38 capability between asterisk <-> spa2100<br>Our T38 capability (3856), peer T38 capability (3872), joint capability<br>(3872) (line 482)<br><br>and mera <-> asterisk<br>Our T38 capability = (3856), peer T38 capability (32), joint T38
<br>capability (32) (line 632)<br><br>Unfortunately i have no access to Mera, nor Cisco. As we were told,<br>Cisco has next settings for our dialpeer:<br>fax rate 9600<br>fax-relay ecm disable<br>fax protocol t38 ls-redundancy 5 hs-redundancy 2 fallback none
<br><br>I'm not sure if this is a bug of asterisk and whether i should submit a<br>ticket. But sending/receiving faxes does work if we exclude asterisk<br>from the path and use it like<br>PSTN <-> Cisco (t.38 origination) <-> Mera (
t.38 pass-through) <a href="http://1.1.1.1">1.1.1.1</a><br><-> DNAT Forwarding <-> <a href="http://3.3.3.3">3.3.3.3</a> Linksys SPA2100 (t.38 termination).<br>Although Fax settings remain the same both at Cisco and SPA2100.
<br><br>Should i provide more information regarding the issue?<br><br>I would really appreciate any suggestions.<br><br>Best Regards,<br><br>--<br>Litnitchii Alexander<br>"Comunicatii Libere" SRL<br><a href="http://www.asterisksupport.ru">
http://www.asterisksupport.ru</a><br><a href="http://www.asterisk-support.com">http://www.asterisk-support.com</a><br><br>_______________________________________________<br>--Bandwidth and Colocation provided by <a href="http://Easynews.com">
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<br></blockquote></div><br>