Sorry for responding so late. Does this mean that the fax is going to a dialpeer that isn't being configured to handle T.38 ? I'm trying to send the faxes with just 1 entire number, so I don0t think the call is not matching that dialpeer . . . . any thoughts ?<br>
<br><div class="gmail_quote">On Fri, Jul 17, 2009 at 3:33 PM, Steve Underwood <span dir="ltr"><<a href="mailto:steveu@coppice.org">steveu@coppice.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">Klaus Darilion wrote:<br>
> Xavier Cardil schrieb:<br>
><br>
>> Hi, I've managed to get HYLAFAX---->T38MODEM-----><br>
>> ASTERISK---->CISCOAS5400 working, but when they are negotiating asterisk<br>
>> drops a message telling "Unknown RTP codec 96 received from gateway" Do<br>
>> somebody know how to fix it ?<br>
>><br>
>> Thank you !<br>
>><br>
>><br>
>><br>
>> << [ TYPE: Control (4) SUBCLASS: Ringing (3) ] [SIP/GWCISCO5400O-600bfcc8]<br>
>> << [ TYPE: Control (4) SUBCLASS: Answer (4) ] [SIP/GWCISCO5400O-600bfcc8]<br>
>> << [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [SIP/GWCISCO5400O-600bfcc8]<br>
>> << [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [SIP/GWCISCO5400O-600bfcc8]<br>
>> << [ TYPE: Control (4) SUBCLASS: T38/Negotiation Requested (19) ]<br>
>> [SIP/GWCISCO5400O-600bfcc8]<br>
>> << [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [SIP/GWCISCO5400O-600bfcc8]<br>
>> [Jul 16 17:50:39] NOTICE[2736]: rtp.c:1739 ast_rtp_read: Unknown RTP<br>
>> codec 96 received from '192.168.3.163'<br>
>><br>
><br>
> Is '192.168.3.163' the Cisco GW? If yes, then it is probably an NSE<br>
> packet. NSE is a Cisco proprietary FaxoverIP solution and uses per<br>
> default payload types 96 and 97 to signal a changeover from VoIP to FoIP.<br>
><br>
> Probably you have to configure the Cisco GW to use T.38 instead of NSE<br>
> for FoIP.<br>
><br>
</div>When did RFC2833 become a proprietary Cisco spec?<br>
<br>
The NSEs just signal the startup of FAX. You still need to switch into<br>
T.38 to actually exchange the FAX.<br>
<font color="#888888"><br>
Steve<br>
</font><div><div></div><div class="h5"><br>
<br>
_______________________________________________<br>
-- Bandwidth and Colocation Provided by <a href="http://www.api-digital.com" target="_blank">http://www.api-digital.com</a> --<br>
<br>
asterisk-users mailing list<br>
To UNSUBSCRIBE or update options visit:<br>
<a href="http://lists.digium.com/mailman/listinfo/asterisk-users" target="_blank">http://lists.digium.com/mailman/listinfo/asterisk-users</a><br>
</div></div></blockquote></div><br>