I think that what Chocolate Bunny is calling a "25-pin" is actually an amphenol connector (25-pairs). In that case, the general wiring pattern would be something like:

Amphenol connector of MICS -- > Amphenol Cable --> 66 block, cross-connect 66 block -->66 block, --> Amphenol cable --> 66 block with T1 punched down.

Hope that helps.

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