Advance feature:
Page Extension: '*' then the extension (*101)
Page All Phones: (*94)
Call Spy All: (*95)
Call Spy Specific: '*95" then the extension (*95101)
Call Pickup: (*98)
Call Pickup Specific: '*98' then the extension (*98101)
Prefix a number with 1831 to make the call private, or 1832 to show your caller id.
Internal service Numbers
50002 - Check Voicemail attached to your extension
50003 - Check another voicemail account
50010 - Last unanswered call/Call return
50012 - Echo test