Paging & Intercom   
Page/Intercom Groups
New Page/Intercom Group
A Page/Intercom Group can be used to make an announcement over the speakerphone on a group of phones. Targeted phones will not ring, but answer immediately into speaker-phone mode. Note that this functionality is dependent on a compatible and correctly configured handset. For a user to be able to dial a Page/Intercom group, the 'pagegroups' local context must be included in the user's Dialplan.
Settings for Paging Individual Extensions
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Prefix for Dialing an Extension as Intercom : 
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Settings for Paging & Intercom
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