I am trying to redo a wall plate with phone cable. The current setup has two different wires coming in to the plate. It is a large circular jack with screws holding the wires down. From the two wires the red and green are being used. The wires also have a black and yellow wire. Those wires are not being used. I tried putting the wires on a new smaller jack (A square one) like a Cat 5 (RJ-45) wall plate jack and I could not get a dial tone. The phone wires had no writing on them and I do not know how to arrange the pairs to get a dial tone. Any help with this is appreciated.