How I hated myself installing these things for XXX telecom promising the customer genuine least cost routing, only to return a few months later with the news that BT can now give you a better deal and can I bypass the boxes I installed last time?
There was another type of Krone box that dispensed with the DIP switches, and had a plastic "comb" that you pulled out to short together the line and equipment sides.
I'm sure you could improvise, and use a different box or the existing NTTP.