Stop "More" label on Aastra phone

I am configuring the topsoftkeys on 6 Aastra 57i’s, and I want the top 6 softkeys to be BLF’s for the 6 phones. The problem is that the phone sees greater than 5 topsoftkeys, so it makes the 6th button more. This pushes the 6th BLF to the next page. Does anybody know of a way to configure the phone to not do the “More” for the topsoftkeys?