My customer has three problems with their Unity: a busy signal periodically when hitting the Messages button; when people call in from the outside, they get the Call Handler and enter an extension but they get a "you have entered an invalid number" error. Third symptom is when the subscribers receive a call, sometimes the phone will show the caller ID of a Unity port, i.e. 1900, then when they pick up the phone to answer the call, it will show the correct caller ID. Whenever they try a second or thrid time, things will work properly. The problems seem to be getting more frequent. There are a lot of MIU errors in the Event Viewer logs but they have been occuring for more than 4 months months; the customer said these problems started about a month or so ago. I checked the logs on the CallManagers and there is nothing in them. All the Unity ports are registered to the CallManager. A Port Utilization report shows that the ports are not heavily utilized. I stopped and started the Unity service. Nothing seemed to work. What else can I look at for these particular problems? Also, which traces can I turn on to try to catch a problem? Are there any known issues involving these problems with this version of Unity? Could all these things be related? I have turned on the MIU traces to try ot "catch" something. Thanks for any help.
Unity 4.04 SR1