Over the past few weeks periodically hunt groups will enter a state where they are constantly "busy". None of the phones in the hunt group are busy and their extension can be dialed fine, but dialing the hunt group extension results in the message "HuntGroupName is busy" being displayed on the screen. I was able to fix this by removing and recreating the hunt group and re-adding the acd agent ID's.
This has happened to two relatively small hunt groups which were easy to recreate, but is now happening to a Customer Service hunt group that receives external calls that is MUCH larger and organized that would be significantly harder to recreate. Customers being routed there are getting busy signals or being dropped the second the rep picks up the phone. Has anyone seen this before or have an idea of what would be causing it. No changes have been made to these hunt groups for months and as previously mentioned the extensions of individuals within those hunt groups themselves are perfectly reachable, and all phones are properly logged into the hunt group.
We are using a mix of 5320e's and 5340e's here.