The default numbering for system extensions is changed to 301-428 from 300-427. This makes it easier to correlate station ports to extension numbers. For example, station port 1 is extension 301, station port 2 is extension 302 and so on.
Department Groups, which have replaced Ring Groups and UCD Groups, are 601-632. See Department Groups for more.
|Version 3 Numbering Plan Changes|
|Description||Version 2||Version 3|
|Voice Mail Ports||501-508||No change|
|Voice Mail Master||700||No change|
|Ring Groups||600-607||Replaced by Department Groups|
|UCD Groups||700-707||Replaced by Department Groups|
|Routing Mailboxes||801-832||No change|