A per site license that permits the NBX system to upgrade to NBX R4.3 system software. This license must be present or the NBX system will not allow moves, adds, and changes (MACs) to be performed.

Note: NBX System Software R4.3 or greater is required for 3Com NBX 3101 and 3101SP NBX phones and 3105 Attendant Console.

The 3Com NBX System Software Release 4.3 includes:

• NBX R4.3 Site License
• NBX R4.3 Resource CD