Phone Cord Wiring Diagram. Rj45 to rj45 on 8 core cable wired straight through. For average residential telephone installations shielded phone cable is not usually necessary.
The kind of wire shown above has recently become obsolete. The red telephone wire. On your phone cable you usually will have bluewhite and whiteblue this means when blue comes first it is mainly blue with white splodges and visa versa.
You can also see other wiring diagram below.
Telephone handset cord rj10 4p4c 15m white. Rj11 to bt wired straight through on four core cable. Greenwhite means green base white overprint whitegreen means white base green overprint. Telephone handset cord rj10 4p4c 64m white.