I have a pcap and can open in Wireshark. Starts with PCMU, switches to T.38. Wireshark (newest, 1.8.3) has trouble dissecting some packets (lots of UNKNOWN PER) and unfortunately I am no expert to tell if there is anything wrong.<br>

<br>Would anybody be able to help in debugging the issue having the PCAP? I can post it somewhere to download.<br><br>Best regards<br><br><div class="gmail_quote">2012/10/17 Michael Collins <span dir="ltr">&lt;<a href="mailto:msc@freeswitch.org" target="_blank">msc@freeswitch.org</a>&gt;</span><br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Can you get a pcap of this and open in wireshark? I think it might give you a bigger picture of what&#39;s happening.<br>


-MC<br><br><div class="gmail_quote"><div><div>On Wed, Oct 17, 2012 at 7:02 AM, Marcin Gozdalik <span dir="ltr">&lt;<a href="mailto:gozdal@gmail.com" target="_blank">gozdal@gmail.com</a>&gt;</span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>Hi<br><br>I&#39;m trying to send a fax from FreeSWITCH using T.38 (via Cisco SIP gateway) to a remote fax. It fails with some cryptic messages:<br>



<br>2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 T4A expired in phase T30_PHASE_D_RX, state 27. An HDLC frame lasted<br>

 too long.<br>2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Status changing to &#39;The HDLC carrier did not stop in a timely manne<br>r&#39;<br>2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Disconnecting<br>





2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Changing from phase T30_PHASE_D_RX to T30_PHASE_E<br><br>I do have full SIP/RTP dump of such a call if it is of any interest. It seems to be a peculiar interoperability issue, as this setup is used as a email2fax/fax2email gateway and it works quite well.<br>





<br>Could anybody recommend any steps I could try to debug/fix the issue?<br><br>Best regards<span><font color="#888888"><br clear="all"><br>-- <br>Marcin Gozdalik<br>
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<br>
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