After you deleted the dti and programmed the PRT card did you do 3-14 and 3-91?

Also 1-1-20, 1-1-21 and 1-1-22?

1-13-00 (one LK lamp for each active channel)?

CAP keys on the phones in 4-12?
Phones in the correct CAP group in 4-43?


There's a lot that could have been missed.

Also, you added a PRT-u20 or u10, the u10 card only worked in older software levels.