To be honest, I have never seen an MGCP hairpin work...<br><br>Usually, we bring the PRI in on one gateway and send the QSIG out another.<br><br>I am presuming that the problem comes with the fact that the source and destination IP audio streams are the same, so no audio (do a show call active voice and confirm this).
<br><br>My guess is that when you are doing a consultative transfer, the call is actually terminating elsewhere (PR-PHONE-PRI)<br><br>Though I do have a solution for you.<br><br>Kill MGCP for the QSIG PRI and use H.323 (keep MGCP for the telco PRI). This way the call will be coming off of the gateway, going to CCM and back to the gateway (this will replicate the consultative transfer that does work).
<br><br><br><br>Jonathan<br><br><div><span class="gmail_quote">On 12/23/06, <b class="gmail_sendername">Bernhard Albler</b> <<a href="mailto:balbler@nts.at">balbler@nts.at</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi guys,<br><br><br>I currently i have a little issue, someone else might have stunmpled upon:<br>MGCP Gateway(2811, running 12.4(8a)), controlled by ccm 5.04-2121. Behind the gateway there is a siemens hicom 300 pbx. We are running iso qsig between the two systems.
<br>When using CFA, or a translation pattern inside of ccm, and this results in a hairpinned call (in via the mgcp gateway, and out of the same gateway) which has no audio. SO neither sides hears anything, signalling is just fine.
<br>If I do a consult. Transfer the same way (e.g. I implemented this with an ipcc-x script as a workaround for now), the audio is cut through just fine.<br><br>The q931 traces on the gateway show, that both channels seem to be connected just fine, a show call active voice shows, that there are still ip call legs, both pointing at the ip of the gateway.
<br><br>Anyone run across this? Am I doing something fundamentally wrong?<br><br>Regards<br>bernhard<br><br><br><br>------------------------------------------<br>DI (FH) Bernhard Albler<br>Systems Engineer<br><br>NTS Netzwerk Telekom Service AG
<br>Gastgebgasse 27<br>1230 Wien<br><br>Tel: +43 (0) 1/867 67 76-0<br>Fax: +43 (0) 1/867 67 76 -56<br><br>Web: <a href="http://www.nts.at">http://www.nts.at</a><br>email: <a href="mailto:balbler@nts.at">balbler@nts.at</a>
<br>------------------------------------------<br>"A doctor can bury his mistakes but an architect can only advise his client to plant vines."<br>Frank Lloyd Wright<br><br><br>_______________________________________________
<br>cisco-voip mailing list<br><a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br><a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip
</a><br></blockquote></div><br>