I'm having problems with MWI to pbx phones off Mitel system. Some work and some don't. (Cisco phones work just fine) What's odd is the ones that work as far as i can tell are new subscribers that haven't gone through self-enrollment yet. once you enroll, mwi seems to stop working. Subscriber Message section in saweb shows MWI request failed even after refresh. Event logs show the following from one of the errors:
Component Miu: Unity Port 32 (PIMG 10.20.11.9:5061) failed to toggle an MWI for extension 7377 to state OFF.
The extension can be dialed. Check whether this is a valid extension, and whether the port and PIMG are configured and operating properly.
PIMG call log shows TDM: Device not available
Odd thing is when I restart Unity, some mailboxes that didn't work would start working although there's still quite a bit that doesn't. Thoughts?