### Switch Compatibility and Aliasing IP Telephones

If you have Avaya Communication Manager (CM) Release 3.1 or earlier you must alias the telephones as follows:

9600 Series Telephone Model | Aliased as... | Earliest CM Release
--- | --- | ---
9620 | 4610SW (recommended) 4620SW | Avaya Communication Manager 3.0 Avaya Communication Manager 3.0
9630 | 4620SW | Avaya Communication Manager 3.0

NOTE: Although support for a 9620 aliased as a 4620SW IP Telephone extends back to DEFINITY Release 11, some features are not available. For example, the 9620 only supports a total of 12 call appearances and administered feature buttons. The 4620 can be administered for a total of 24 call appearances and feature buttons.

For more information about aliasing one telephone model as another, see “Using an Alias” in the Administrator Guide for Avaya Communication Manager (Document 03-300509).