I Thought I already posted this but if you punched the block to the USOC standard pins 1 and 8 would be the brown pair.

That is an old Telco standard and not used for data.

The pairs fan out like 4-5 and 3-6 all the way to the end
(2-7 & 1-8)

This is the RJ31X

[Linked Image from gfretwell.com]

Greg Fretwell