RJ45 PHONE JACK WIRING

RJ11 Phone to RJ45 Jack - Tom Builds Stuff
Cat5, Cat5e, Cat6 cable is frequently used for wiring telephone jacks. You can send up to 4 telephone lines on one 4 pair cable that terminates at a RJ45 (8P8C) jack. The problem is most phones, even multi-line phones, don't directly plug into an RJ45 jack.
HOW TO: Using a Cat5e Jack (RJ-45) for use with a
Jun 04, 2006HOW TO: Using a Cat5e Jack (RJ-45) for use with a Telephone Connector (RJ-11) This post illustrates how to wire up a RJ-45 jack for use with a RJ-11 connector. Please be advised, that it is wise to use voice grade RJ-11 jacks instead of RJ-45 jacks for voice or telephone systems because you run the risk of someone plugging a computer into