This is an issue we have seen rarely in the past, but it is occurring more frequently on our high volume lines.
What happens is that sometimes the users who dial in cannot be heard by the receptionist. Sometimes, if she puts them on hold and takes them back off, they can then have the conversation, both hearing one another. It seems to only be a one-way problem, the callers can always hear the receptionist, just not vice-versa. Also, sometimes the Hold trick does not work. I have looked for many possible fixes, but nothing seems to work.
Secondly, my 7970's do the same thing, but rebooting them seems to fix it for a while. This only happens consistently on the 7970's, which we only have 12 of. I have tried to update the load on the phone, but it tells me "version error" on 2 different loads. I know this is a seperate issue from the first, but it seems funny that the symptom is the same.
We have Call Manager 4.1(3)sr3a with Unity 4.0 Build 4.0(3).
Any help or ideas would be appreciated.