On Unity 4.0.4 sr1 sometimes when callers call in they are getting a "sorry, that is an ivalid entry" error when entering a DN. They get to the call handler prompt OK, but sometimes they get that error. If they call right back, the same DN will go through. The problem seems to happen more in the morning, but it will also happen in the afternoon. The ports are not being overutilzed, according to the Port Usage report.
Is there a trace that I can turn on in Unity to see what digits are actually getting to Unity when the DN is entered? Is it possible that the DTMF tones are getting corrupt? This connects to a Callmanger 4.1.3 sr3a. There are four CM/Unity clusters in the same room, connected to the same switches, with the same configuration, with the same versions, all using the same gateways and PRIs. I will upgrade the TSP to 8.1.3, it is currently 7.0.2. Is there anything else I can check? Thanks.