[cisco-voip] frustrating FXO disconnect

[Jason Burns]

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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