RJ11 v. RJ12

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 Question by Ben Whorton posted 21 Jan 2003
 RJ11 v. RJ12
What is the difference between RJ11 and RJ12 and can you use one in place of the other, ie: are they interchangeable as long as it's consistent throughout the wiring? Thanks in advance!
 Answer by Dmitri Abaimov posted 28 Jan 2003
Dear Ben,

These are essentially the same jack. RJ11, however, has only 4 positions connected while RJ12 has all 6. As long as your system does not use 6 wires to operate, you should be fine with either one of those.
Usually, analog phone takes a center pair of pins, which works with both connectors.

Dmitri Abaimov, RCDD

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