Thanks Brian! Esi did try to adjust some settings with the first system.. and although it seemed to get better, they never got it totally right and at one point we got scrambled CID info...
I am not sure if my installer is going to try this again since they have tried many times with ESI and finally ESI said that it is our service provider.

Have you ever heard of Verizon centrex lines having issues with ESI IVX 128 systems? The installer said that I needed to ask Verizon to move caller ID info forward since the information was coming in too late. Verizon had no idea what I was talking about.