Newbie learning Asterisk as I go. Built Asterisk on Centos from source code. I have 6 phones configured. 4 of them are Grandstream and 2 of them are Yealink. When an extension is busy or unanswered, the call goes to voicemail. I can dial the voicemail pilot number and get the IVR. I can record my greetings and my messages, retrieve my messages, delete messages, etc. All seems to be working, except that I have do not have MWI indication on the phones.
I have spent the last hour searching Google to no avail.
I have the normal Voicemail exten entries in extension.conf and that it is.
As I stated, Im new to Asterisk (over 15 yrs Cisco VoIP) so Im learning as I go.
What did I miss?