I am using a 24 button display phone and we have tried it on a few different ports but it does the same thing on every port. I have installed these before and have never needed a "unlock code" from Vodavi. We also tried with a 66 block and with a 8 port amphenol breakout.

The only dip switches I have seen on the main board are the 2 dipswitches for the battery and the default. I dont see any dipswitch 8. Their are 8 dip switches on the rs232 card but I was under the impression those were for the speed,baud,etc