The Group Paging service allows a user to set up a one-way call or group page to a up to 75 target users by dialing a number or extension. 

The Group Paging service makes a simultaneous call to all the assigned targets and announces to the originator that the system is ready for paging. 

After speaking, the originator ends the page by hanging up the call. Group Paging is enterprise-wide for originator and target assignment.

Known Bugs:

Group Paging - Auto Answer / Busy Lamp Field:

Polycom has confirmed there is a bug that when phones are assigned with BLF, and when a monitored phone initiates group paging, the monitoring phones may not auto answer the paging call. There is not a fix yet, the workaround is to remove BLF or answer paging calls manually if phones don’t auto answer.