Phone Wiring FREE cabling and networking Helpdesk
 Question by Jim Frost posted 15 Apr 2004
 Phone Wiring
Hi, I am trying to wire a classis red/green/black/white box into a new home that has cat 5 jacks that are orange/orange-white/blue/blue-white. For basic phone service, what 2 connect?
 Answer by Dmitri Abaimov posted 15 Apr 2004
Dear Jim,

A CAT5 jack should have four pairs (8 pins), so you should be also able to see connections for green-white/green and brown-white/brown.

Anyways, for a basic phone service I would only connect green and red to pins #4 and #5 of the CAT5 jack, which should coincide with pair #2 (white blue/blue). The second pair is for a second phone line, and, depending on the pinout of your jack (T568A or T568B), it can be the orange or the green pair. So, if you only have one line, connect only green/red to white blue/blue, and that should do it.

Dmitri Abaimov, RCDD

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