Paging - Cisco SPA504G Setup & User Manual

Simply call *97 from your VoIP Phone and then enter your password.
Then press option 0 for advanced options
Then press option 1 to record your unavailable message.

Paging

Dial 222 to call all phones in the paging group.
OR
Press *80(EXT) to page a direct extension. Ex: *80103 will reach Ext: 103