[cisco-voip] frustrating FXO disconnect

[Joe Halenkamp - JHH]

Does this occur on every call that is transferred to voicemail?  If
Callmanager is handing the call off to Unity, it may be a specific port
your having issues with, if it is intermittent.  I would suggest viewing
the port analyzer in Unity.  This will give you some idea of whats
occurring on the port that picking up the call in Unity.

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jason Burns
Sent: Monday, June 08, 2009 3:24 PM
To: Ryan Ratliff
Cc: VoIP
Subject: Re: [cisco-voip] frustrating FXO disconnect

 

Has anyone made an effort to look at the CallManager traces? For me they
are almost always the most complete picture of what happens in a call.

On Mon, Jun 8, 2009 at 2:39 PM, Ryan Ratliff <rratliff at cisco.com> wrote:

If you've determined that Unity is initiating the disconnect then get
the Unity expert brought back in to help determine why.   Are there any
errors in the Unity logs at the time the call is dropped?

-Ryan



On Jun 8, 2009, at 2:29 PM, Robert Singleton wrote:

I have a 2811 equipped with a 4FXO card in one particular location that
suffers a symptom that no other location does.

Incoming calls on the gateway work great and can be transferred anywhere
(ip phones, external gateways, etc) EXCEPT to Unity VM. Callers will be
disconnected a few seconds into the greeting. Please note that the calls
are being released and audio is cutting through, however, the call will
be disconnected after about 10 seconds. This problem has existed since
the branch was put on net, so I personally am pretty sure there is some
minor configuration issue, but I have not found it.

In working with Cisco TAC, it seems to have been difficult to narrow the
problem down to the proper technology. Since the word 'voicemail' was
mentioned, I was connected with a Unity expert. However, only this
specific location has this problem and only when the call is on this
particular FXO gateway. In working with a gateway expert, the disconnect
seems to be coming from Unity. I kanna win.

For political reasons, we are scheduling a complete replacement of all
the equipment. You know, buying a new car because the old one is idling
rough. Personally, I'd like to resolve this *before* replacing nay
hardware because I don't think it's a hardware issue.

Equipment is as follows: 2811 running IOS 12.4(9)T7 with a PVDM2-16, a
VIC2-4FXO and a WIC-1DSU-T1-V2. FXO ports are loop start, configured via
MGCP. So far as I can determine, the configuration is identical (beyond
unique site data such as IP addresses, dhcp pools, etc) to any of a
dozen or more similar sites that do not suffer this symptom.

Any ideas?

Thanks,

Robert

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