Polycom intercom problem

Auto answer paging to intercom works for a brief time. After a fresh reboot of the server paging works just fine. However after 20 - 30mins of the phones sitting the auto answer stops working and the paging call fails. If I reboot the server everything works again. Any ideas on why this is happening?

Thanks

Console output? After 20-30 minutes are you able to make any calls to the extensions?

Calling works between exts. Even when I call 900 my paging group the phones ring but the auto answer does not work until reboot.