[cisco-voip] FW: Quality Issues with Qsig/MGCP gateway on 5.1

Wed Jun 20 12:48:21 EDT 2007

I'm getting ready to do my CM 4.1 to 5.1 upgrade and one of the things I
notices (I'll have to find the doc on CCO again) was that VGW's needed
to be running IOS 12.4(11)T or better.  Could this be the issue?

Scott

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Nick Kassel
Sent: Tuesday, June 19, 2007 8:58 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] FW: Quality Issues with Qsig/MGCP gateway on 5.1

We are running 5.1.1b 

________________________________

From: Jonathan Charles [mailto:jonvoip at gmail.com] 
Sent: 19 June 2007 16:55
To: Nick Kassel
Cc: cisco-voip at puck-nether.net
Subject: Re: [cisco-voip] Quality Issues with Qsig/MGCP gateway on 5.1

Which version of 5.1?

Cuz the first release of 5.1 didn't mark DSCP correctly so, that could
be your problem...

Make sure you are running 5.1.1b

Jonathan

On 6/19/07, Nick Kassel <Nick.Kassel at charles-stanley.co.uk> wrote:

Since upgrading to CM 5.1 we have been experiencing a few issues with
the quality of calls across our Qsig gateway. Our current set up is Call
Manager 5.1.1b with a 2811 MGCP QSIG gateway connected to an Ericsson
MD110 PBX.

The 2811 is running c2800nm-ipvoicek9-mz.124-4.T3 and has 1 x E1 card
and 2 x PVDM2-16 dsp's

We have 26 branch offices with IP phones but over half of the staff at
out HQ are still using Ericsson phones, the issues have started
occurring between calls on the Ericsson phones and our Branch offices
and users are experiencing poor quality calls with interference and
echo.

We never had these issues running on 4.1(3) with the same gateway. 

It's not happening all the time but enough for users to raise the issue.

Has anyone come across any similar issues with 5.1 and Qsig gateways or
does anyone know if there any bugs relating to this, or if anyone could
point me in th e direction of troubleshooting this I would be most
grateful.

Regards

Nick

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