3Com NBX Single-Site Upgrade to 3Com NBX R6.0 System Software License

Single-Site Upgrade to NBX R6.0 System Software License for the NBX 100, NBX V3000, and V5000 phone systems. License includes right-to-use licenses and keys for R4.2, R4.3, R5.0 and R6.0.

Note: This R6.0 license is not required on new system purchases; the license is embedded in these cases