The following lines were added (+) and removed (-):
[[File:rj14wiring.gif]][[File:ph_eight-strand.png]]When polarity is concerned, the RED and YELLOW are considered the HOT or POSITIVE.For a demarc the telco may use a Punch Down Block such as the 66 Block. Some installations pull a Cat.3 or Cat.5 cable in which has 4 pairs of wires and they are wrapped from top to bottom of the punch down, provide for 4 phone lines, multiple phone connections for each line all the way down the block.For a demarc is part of the [[Telephone System]] where the telephone company may use a Punch Down Block such as the 66 Block. Some installations pull a Cat.3 or Cat.5 cable in which has 4 pairs of wires and they are wrapped from top to bottom of the punch down, provide for 4 phone lines, multiple phone connections for each line all the way down the block. ==Related== *[[Ethernet RJ45 Wiring Reference]] *[[Telephone RJ11 Wiring Reference]] *[[Telephone System]] *[[Telecommunication Jack]]