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

[Erick Bergquist]

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.