Looking to upgrade a IDCS 16 KSU that has a SVMI-2 voice mail card in it. The SVMI-2e is
able to go to 4 ports with a i button upgrade key. Is it possible to do this on SVMI-2...
If possible, where might i find one or a 2e with 4 ports.

Thanks for taking you time to read this.
Very much appreciated.