Is your phone a 1D2 type, like this?
![[Linked Image from i98.photobucket.com]](https://i98.photobucket.com/albums/l268/ev607797/1D2.jpg)
Using the 32B "dumb" board is the way to go. It will allow you to make/receive calls, but none of the coin collection mechanisms will function. Being in Europe, there may be an issue with getting the set to ring, but I doubt that will be an issue.
Remember that when connected to a non-coin line, any coins that are deposited will be held in the escrow chamber and cannot be returned using the coin return lever. You will need to warn people to not deposit any coins because they will be gone. You'll also need to gently push the coin relay armature in periodically to dump any coins that may have collected.
I doubt that the phone will accept anything but US coins, so more than likely, Finnish coins will become stuck. With this being the case, the coin return lever WILL work to eject them.
I don't know anything about programming the Protel board, so I can't offer you any guidance there.