What version of code are you running, MGCP/DSP errors tend to run rampant and are typically responsible for issues like this. are you showing any dsp errors in the logs? We've had very good success with 12.4(15)T8+ as far as MGCP/DSP stability. Cisco has tried pushing me a few time to higher levels of code and I've almost always gone back to this version because of bugs.<div>
<br></div><div>Another note that probably has no bearing on the problem but is a good practice you should lock in your calling numbering type/plan to isdn/national and leave called to unknown/unknown, it can cut down on other issues down the road (provider dependent). HTH</div>
<div>Ted<br><div><br><div>
<br><br><div class="gmail_quote">On Fri, Aug 21, 2009 at 12:08 PM, Tanner Ezell <span dir="ltr"><<a href="mailto:tanner.ezell@gmail.com" target="_blank">tanner.ezell@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I have a MGCP gateway connected via PRI. Whenever a call comes in from the PRI, the IP Phone rings a single time and then disconnects. On the gateway, debug isdn q931 reports:<div><br></div><div><div>*Mar 1 11:04:27.327: ISDN Se1/0:23 Q931: RX <- SETUP pd = 8 callref = 0x0008 </div>
<div><span style="white-space:pre"> </span>Bearer Capability i = 0x8090A2 </div><div><span style="white-space:pre"> </span>Standard = CCITT </div><div><span style="white-space:pre"> </span>Transfer Capability = Speech </div>
<div><span style="white-space:pre"> </span>Transfer Mode = Circuit </div><div><span style="white-space:pre"> </span>Transfer Rate = 64 kbit/s </div><div><span style="white-space:pre"> </span>Channel ID i = 0xE1808397 </div>
<div><span style="white-space:pre"> </span>Preferred, Interface 0, Channel 23 </div><div><span style="white-space:pre"> </span>Calling Party Number i = 0x00C0, N/A </div><div>
<span style="white-space:pre"> </span>Plan:Unknown, Type:Unknown </div><div><span style="white-space:pre"> </span>Called Party Number i = 0xA1, '5032733100' </div><div>
<span style="white-space:pre"> </span>Plan:ISDN, Type:National</div><div>*Mar 1 11:04:27.343: ISDN Se1/0:23 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x8008 </div><div><span style="white-space:pre"> </span>Cause i = 0x80A9 - Temporary failure</div>
<div><br></div><div>I'm wondering if this is a dsp issue, as a call into the POTS line works fine, but sending that call to an IP Phone I get this issue. Any suggestions?</div></div>
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