The issue is that there is a loop of some sort in the voicemail. This has prevented the voicemail from shutting itself down properly during its nightly maintenance. When this happens, you may discover a couple ports active to one another... you can find this in the Maintenance Command Line with the following commands...
STATE 1 4 27
STATE 1 4 28
Make note of any ports that are active. for instance...
1 4 27 16 1| Superset 4150 |Busy |Call Proc|4 0217|Wait
1 4 27 16 2| Unassigned |Not applicable | | |
and
1 4 28 1 1| Superset 4150 |Busy |Call Proc|4 0217|Wait
1 4 28 1 2| Unassigned |Not applicable | | |
Next issue the command...
RESOURCE 1 4 27 16 1
you will see something like this... indicating two voicemail ports are talking to one another.
Circuit: MC330AA DNI Line at location 1 4 27 16 1
Call Process: 5 02C7 Device Type: Superset 4150
Call State: Talking Party Type: Terminator
Receive Link: 243 Channel: 21 Transmit Link: 243 Channel: 21
>>>>> Other Party for Call Process 5 02C7
Circuit: MC330AA DNI Line at location 1 4 28 1 1
Call Process: 2 01E4 Device Type: Superset 4150
Call State: Talking Party Type: Originator
Receive Link: 28 Channel: 17 Transmit Link: 28 Channel: 17
To stop this problem, do one of the following:
reboot the controller
OR
log into the RTC shell or connect to the maintenance port
issue the following commands at the > command prompt
iPVM_Stop
Wait for it to stop and return the following text and the > prompt.
"iPVM stopped"
"value = 0 = 0x0"
>
Next from the ESM (web interface) maintenance command type the following....
BUSY 1 4 27
BUSY 1 4 28
At this point, you should not be able to call into Voicemail.
Now at the RTC Shell or Maintenace port > command prompt, type the following:
iPVM_Start
After it starts you will see the following:
"Starting iPVM Version 14.2.1.6" (note that your version may differ from mine.
"Value = 0 = 0x0"
Call into Voicemail - it should answer... and your alarm will clear.
The release notes from newer software don't spell it out, but it has supposedly been resolved in newer software loads - Mitel support recommended this to me for this customer a few months back. They also eluded to the Auto Attendant set up with a loop of sorts - I haven't been able to find such a loop.
My problem system is running MiVB 7.2 SP1 PR1 13.2.1.27.
I hope this helps.