Thought I’d put a final note on this thread. I went with the GXP2130 and so far have been happy. Haven’t fully figured out all configurations yet and needed to update the firmware to the current beta 184.108.40.206 to fix some problems but it’s working.
Regarding paging, I tried to get the built-in Grandstream multicasting working but couldn’t. Then I stumbled on this old post:
GXP2130 And Intercom Mode
Worked right away and really easy to setup. Of course the two phone settings would have driven me insane trying to figure out. So many thanks anomaly0617.
Duplicating instructions in case that link goes away. This is Grandstream specific but might help others:
Install the Paging and Intercom module in Asterisk and configure a paging extension.
In your Grandstream phone:
Under Accounts - Account X - Call Settings
Allow Auto Answer by Call-Info to Yes
Custom Call-Info for Auto Answer to answer-after=0 (no quotes).
Under Settings - Programmable Keys
Set one of your MPKs like this:
Mode = Busy Lamp Field (BLF)
Account = Account X
Description = All Page
Value = [Defined Paging Extension]