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<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Hello
List.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>We are having some problems using t.38 together with a Cisco voice
router at one of our providers end.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>We are using the new digium asterisk fax module to generate the fax,
and when we use together with our internal Audiocodes Mediant 2000 gateways, we
have no issues what so ever, and the faxes go right through.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>When we send faxes to our other provider, who has cisco hardware at
their end, we get this error:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>-- Channel 'SIP/xxx.xxxxxx.se-08aaf470' fax session '0', [ 006.607923
], STAT_EVT_HW_CLOSE st: WT_HW_CLS rt: WCLSNCLS<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>-- Channel 'SIP/xxx.xxxxxx.se-08aaf470' fax session '0', [ 006.608118
], STAT_SES_COMPLETE<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>-- Channel 'SIP/xxx.xxxxxx.se-08aaf470' fax session '0' is complete,
result: 'SUCCESS' (FAX_NO_FAX), error: 'CANCELED', pages: 0, resolution:
'unknown', transfer rate: '2400', remoteSID: ''<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:32] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:33] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:33] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>[Apr 23 15:30:33] WARNING[31839]: rtp.c:1434 ast_rtp_read: RTP Read too
short<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>I can see that asterisk discards all RTP T.38 packets sent from the
provider, which the error message also indicates.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>Is there a known problem, connecting to cisco hardware using t.38 in
Asterisk 1.6? or does anybody know of a patch that fixes this problem?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>I can see that in the end of the T.38 packet, cisco adds 4 zero fields,
which are not in the packets that Asterisk sends. Is this some weird “we-are-cisco-and-therefore-decide-how-the-packets-should-look”?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'>Kind Regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'>Jon Leren Schøpzinsky<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'>Systems Architect<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'>Firstcom A/S<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span lang=EN-US
style='font-size:10.5pt;font-family:Consolas'>Bådehavnsgade 2C, 2.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span style='font-size:10.5pt;
font-family:Consolas'>2450 København SV<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Consolas><span style='font-size:10.5pt;
font-family:Consolas'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>Web: </span></font><a href="http://www.firstcom.dk"><font
color=blue><span lang=EN-US style='color:blue'>http://www.firstcom.dk</span></font></a><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
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