Not to worry, assuming that the wiring up of the jack was correct. The
two, innermost, copper connections is what is making for Line 1 so whether
it's a four conductor plug or a six, or eight, as long as the middle two
make you have a phone. The jack can be 2, 4, 6, or 8 copper pins and your
single line phone plug work. You can't reverse that though and try and put
a 6 wire or 8 wire plug in a RJ11 Jack, but then you knew that already.
Polarity today isn't much an issue either but the line one colors are red &
green wires.

Remember though that each phone jack has 46 - 52 Volts DC on it when the
line is off hook and even more stimulating if you happen to get a call then
there is from 90-105 Volts AC pulsating through those connectors at around
20Hz to ring your phone. Been there and tasted it .. .not a good taste
so if you wire up your own jacks or mess around with them take care that no
one calls during the time you are touching the connectors.





On 12/24/06 11:23 PM, in article
, "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)?