The message waiting indicator works but look at the above output. See the call going to *80002571? That is a voicemail received and the CUE is using the "8000... ephone-dn 600" to turn on the mwi light. It does, it turns it on. However, if another user receives a voicemail the mwi light will not turn on because the call to *800022571 call is still in progress. The mwi light will not go on for any other user until the call times out. The same for mwi light off.
So, the mwi light will not go on or off is there are other calls using the ephone-dn 599 or 600. The observation is, a user receives a voicemail but the mwi light does not turn on. That's because another user has received a voicemail and the call to 8000.... is still held.
How can I get these calls to tear down faster? The calls to 8000.... or 8001.... stay active for 5 min's or so.
Configure Multicast Paging on the Cisco IP Phone 7800 Series or 8800 Series Multiplatform Phone
The Cisco IP Phone 7800 and 8800 Series Multiplatform Phones provide voice communication over an Internet Protocol (IP) network...
Add Call Park on a Cisco 7800 or 8800 Series Multiplatform Phone Key Expansion Module
Call park allows the user of the phone to put an incoming call on hold so that the call can be retrieved on another phone. A call is park...