This article shows all reserved number space
The following numbers should not be assigned within a domain because they are reserved for system functions. If you wish to use extension numbers in the reserved space, Monster will charge $95 per domain for custom programming.
|933||911 Test Number|
|700-799||Used for Dynamic Call Parking Queues|
|99 + Users Extension (Ex. 99 + 100)||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|
|5004||Reserved for Future Hot Desking Development.|
|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.|
NOTE: Extensions should not begin with the number 0, and please use 3 and 4 digit extensions. 2 digit extensions will cause setup issues.