wiring up analog phone to telco board demarc

Hello,

I need some assistance on hooking up a new Avaya analog phone (similar to a 6221).

The telco provided a single pair of wires as a handoff (one black & one yellow, thin strand of copper cross connect wires) Is this single pair enough to power up the phone display and get dial tone? How do I hookup the phones RJ45/RJ11 jack to the single pair strands coming out of the telco board demarc?

The phone has a jack that accepts RJ45/RJ11 combo and I've tried testing it by plugging a regular ethernet cable into the back of the phone and stripping the other end to untwist the 4 pairs and stick them one by one onto the pins of the handoff on the telco board but I could not get dial tone and the phone display wouldn't light up. I tried every set of pairs orange, green, blue, brown with the standard 568B wiring on the phone end.

Isn't a single line analog phone supposed to need just the middle pair for a connection? I know the colors are different on the standard 2 pair phone/fax cable going to 4 pair twisted ethernet, but isnt the copper core essentially the same? 24 gauge AWG, etc? Essentially I should be able to un-twist the middle pair of the CAT5 (blue/blue stripe) and splice it into the black and yellow cables coming from the hand off from the telco and it should give me dial tone. Does this sound like it should work. Obviously the older analog phone doesn't need PoE, but can it pull basic dial tone over a single pair of stranded cross connect wire?

Any help is greatly appreciated.