I have a similar problem as this thread:
https://community.freepbx.org/t/polycom-mwi/12460
The Message waiting indicator as well as stutter dial tone are suddenly not working on our Polycom VVX401.
The concern about the fix provided in that thread is that we use the commercial endpoint manager and I’m thinking the MAC.cfg will get overwritten.
Things were working well for years and suddenly this has stopped working. I am not sure of any changes we made that would cause this.
I’d appreciate any help you can give on this please.