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Hello,<BR>
<BR>
I have no idea about the cisco phones. Look at the stats of the sip phones and try to enforce ulaw / alaw as codec.<BR>
<BR>
I use the same combination with a regular euro-isdn line, siemens isdn phones and nokia (e61) and snom sip phones. Perfect quality, the other end doesn't
recognize the snom360 as an ip phone. <BR>
<BR>
regards<BR>
Oliver<BR>
<BR>
-----Ursprüngliche Nachricht-----<BR>
Von: Michael Landin Hostbaek <mich@freebsd.org><BR>
Gesendet: 13.10.'07, 15:37<BR>
<BR>
> Hello,<BR>
> <BR>
> I have a FreeBSD box (6.2) running Asterisk 1.4 (latest from ports) - <BR>
> in it, I have a Digium B410P QuadBRI card. On the card, I have (at <BR>
> this time) one ISDN2 (T0) plugged in.<BR>
> <BR>
> I have installed i4b (from trunk) with matching capi_chan.<BR>
> <BR>
> On the other side of my Asterisk box I have a simple LAN with n SIP <BR>
> peers (typically Cisco 7940/7960 phones)<BR>
> <BR>
> All SIP peers can ring back and forth without any problems, and they <BR>
> can of course, also ring to and from the Asterisk box (echo test, <BR>
> Voicemail etc etc)<BR>
> <BR>
> Now, when I receive a call one ISDN line - I have setup the following <BR>
> dialplan:<BR>
> <BR>
> [isdn-in]<BR>
> exten => _4215,1,Goto(some_context,2000,1)<BR>
> <BR>
> The SIP peer (2000) rings as expected, but the incoming sound quality <BR>
> it horrible, and there are huge delays. However, the outgoing RTP <BR>
> traffic is perfect.<BR>
> <BR>
> I am ONLY having this problem with the Cisco phones.. when putting <BR>
> fx. X-Lite or a Siemens phone - everything works fine.<BR>
> <BR>
> I have tried with different Cisco phones, and different firmware <BR>
> versions - but the problem persists.<BR>
> <BR>
> It is the exact same problem when dialing out thru the ISDN lines.<BR>
> <BR>
> The only thing I can see on the Cisco phones (stats) is that the <BR>
> "RxDisc" counter goes ballistic when it is connected.<BR>
> <BR>
> Any ideas or suggestions would be much appreciated!!<BR>
> <BR>
> /mich<BR>
> <BR>
> <BR>
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