Altigen AltiWare OE/ACC Version 5.0A Administration Manual page 365

To Activate IP Paging:
1. Press #46 followed by huntgroup number on your IP phone.
Note: Both analog and IP phones can initiate paging over IP.
However, only IP phones can receive group paging. Also, you
cannot set up a speed dial on the Alti-IP 600 phone for group
paging. IP paging to a remote IP phone over WAN is not
recommended.
AltiWare OE System Installation & Administration Manual 14-3
Paging Group Configuration