Definitions for "RJ45"
Keywords:  modular, connector, jack, utp, pin
A standard 8 pin telephone connector. ISDN lines are generally delivered by the phone company on RJ45's. On a standard U-interface ISDN installations, signal will be on the middle two pins (4 & 5) and phase is not important.
The technical name for the structured wiring connectors.
RJ-45 unshielded twisted-pair cable port