I am a new member and just incorrectly posted comments on difficulty hooking up a newer plug in phone jack. he comments are posted as a reply to a phone, fax hook up - sorry. A downstairs bedroom had full length mirrors on one wall removed and the original (house is 40 yr old) phone jack box did not have a face plate. I finally found a new round style face place with 6 connections. Originally there was a 4 wire (green, red, black & yellow) wire that went from the box to the bottom trim of the wall. This wire was disconnected and I connected the new jack red connection to a green/white wire and to the green connection a green/green wire. There is only one of each of the green/while and green/green wires. No dial tone present after hook up. I checked a similar 4 connection jack in a 2nd floor bedroom and there was 2 green/white wires to the red wire connection and 2 green/green wires to the greed wire connection. The new jack was connected to the 2nd floor bedroom jack as mentioned above and a dial tone was present. Can not locate another green/green or green/white wires in the 1st floor bedroom jack box. What am I doing wrong.