Hello all, We currently have a Norstar Modular ICS with a software version of 4.1 For years we have had a Handoff from AT&T providing a T1 service thru their router/switch for our 18 outside lines. Their router/switch then provides the analog line to our PBX. Lately in a effort to save cash a another company offed to provide our primary phone service, but we would have to upgrade our PBX to accept the T1 line so I purchased a 1/2 slot Combination T1 service, 6 port expansion card and a Full slot Digital T1 Digital trunk interface card. Now I have been adding lines, added voicemail and changing things on this Nortel ICS for 13 years and I haven't had any issues or problems yet, since there is pleanty of documentation out there for the usuall chores, but this is new to me and I cannot find any technical documentation on upgrading our system. What else do I need to do for programming and setting up this new T1 primary service and I seen a Nortel Norstar Primary Rate Interface (PRI) Enabler Key Code (NTAB2769) that is available which seems to me that it is a license agreement? From what I understand our Modular ICS's software can accept this service. Any help or info is appreciated!