Reserved Number Space


411 Information
611 Customer Service
911 Emergency
933 911 Test Number
700-799 Used for Dynamic Call Parking Queues
7000-7999 These are unusable as 4-digit extension numbers because they conflict with the 7+extension (3 digit extension) rule to transfer a call directly to voicemail. If you do not use 3-digit extensions, then this range can be safely used for other purposes.
70000-79999 These are unusable as extension numbers because they conflict with the 7+extension (4 digit extensions) rule to transfer a call directly to voicemail. If you do not use 4-digit extensions, then this range can be safely used for other purposes.
99XXX+ 99 plus a users extension (3 and 4 digits) are reserved to work with Intercom features.
5000 Unregistered Login to VMail (prompted for acct no and password)
5001 Registered Login to VMail (prompted for password only)
5002 Hot Desking Sign In
5003 Requests the User's PIN then provides a 2nd dialtone (useful for calling from phones in public spaces)
8888 This User has a limited view in the PBX portal. When assigned the Office manager role, the 8888 User can only view the Home and Call History pages. Other Office manager functions are hidden.
XX Please use 3 and 4 digit extensions. 2 digit extensions will cause setup issues. NOTE: Extensions should not begin with the number 0.