[cisco-voip] ISDN sudden disconnect.

[Ted Nugent]

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.
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
Ted



On Fri, Aug 21, 2009 at 12:08 PM, Tanner Ezell <tanner.ezell at gmail.com>wrote:

> 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:
> *Mar  1 11:04:27.327: ISDN Se1/0:23 Q931: RX <- SETUP pd = 8  callref =
> 0x0008
>  Bearer Capability i = 0x8090A2
> Standard = CCITT
> Transfer Capability = Speech
>  Transfer Mode = Circuit
> Transfer Rate = 64 kbit/s
> Channel ID i = 0xE1808397
>  Preferred, Interface 0, Channel 23
> Calling Party Number i = 0x00C0, N/A
>  Plan:Unknown, Type:Unknown
> Called Party Number i = 0xA1, '5032733100'
>  Plan:ISDN, Type:National
> *Mar  1 11:04:27.343: ISDN Se1/0:23 Q931: TX -> RELEASE_COMP pd = 8
>  callref = 0x8008
> Cause i = 0x80A9 - Temporary failure
>
> 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?
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20090821/faf39757/attachment.html>