On Sun, 24 Dec 2006 22:23:08 -0600, "rb" wrote:

Are RJ11 and RJ14 modular plugs the same size?

Do they physically fit the same jack?

The RJ14 jack can accommodate six conductors. If you use a single line,
four conductor phone cord (assumes a four conductor plug) into an RJ14 jack,
does it work OK (assumes the device the jack is in is a single line phone?

Will a two line, four conductor phone cord (assumes a four conductor plug)
work OK in an RJ14 jack (assumes the device the jack is in is a two line
phone)?


Probably.

I see the 6P6C (6-conductor) jacks called RJ12. Those are the same
size as 6P4C ones (RJ11). A RJ11 plug will fit into a RJ12 jack, with
the 4 conductors automatically making contact with pins 2-5. An RJ12
plug will work, except than pins 1 & 6 will not be connected. An RJ12
crimping tool will work on RJ11 plugs (I think) but an RJ11 crimping
tool will NOT work on RJ12 plugs.
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