I have 2 BRI ISDN circuits that were ordered NATIONAL ISDN BRI-NI-1 with EKTS (electronic key telephone system) turned off. The telco is Verizons. Can I have secondary (virtual or softkey)numbers programmed in this package? The number (SPID phone number)associated with the circuits work fine. I need 12 more virtual numbers added to the BRI-U2 card. This Norstar system is replacing an AT&T system with soft keys.