Paging with Business Phone accounts
Paging allows you to speak to your colleague directly on their extension via their speakerphone.
The way to page is to dial *77+the user extension you want to page. (i.e. *77200)
You may also page all using *77000
If it is not working, ensure that the user who needs to page people has the permission enabled.
Head to "Business Phone" - "Permissions", and check the box under "Paging" for that user.
Make sure and also click "Apply Changes" under "Business Phone" and then click "Provision".