[cisco-voip] Call on analog port gets conferenced in with Unity if picked up on 3rd-4th ring

[Wes Sisk]

Most likely either Unity, phone, or router allocated the same UDP port 
for this call as a previous call and then did not properly teardown 
previous call.  Packet capture would show who's still streaming packets 
that shouldn't be.  /wes

Erick Bergquist wrote:
> I have a strange issue, when a user at a remote site picks up a call
> on the last ring before it rolls to Voicemail the caller gets
> conferenced in with the Unity greeting. The outside caller is talking
> to the person and hears Unity in the background.
>
> The call comes in on a H323 gateway FXO port to the IP Phone at the
> local site with the same gateway. All calls are set for G729 and QoS
> is good on both sides, but it is a MPLS WAN between. They have
> multiple sites and this is only site having this problem.
>
> If they answer the call before the last ring, everything is fine.
>
> Call Manager version 4.1(3)sr4d, IOS on gateway is 12.4.3g.
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