The 3Com 3C10501 NBX System Software Release
version 4.2 is the first upgrade that requires a customer to purchase a
license keycode to activate the functionality. Release 4.2 is the
sixth generation of system software available on the SS3 NBX and NBX 100!
This NBX 4.3 code is required to operate the
3C10402A Phone and 3C10400 ATA device.
* *You must upgrade to V4.2 before you can begin the V4.3 upgrade.
V4.3 comes with V4.2 code.***
