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)?

An RJ11 plug will fit and work correctly in an RJ14 jack.
--
Peace,
BobJ

"rb" wrote in message
.. .
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)?

In article ,
"rb" wrote:

Are RJ11 and RJ14 modular plugs the same size?

Yes.

Do they physically fit the same jack?

Yes.

The RJ14 jack can accommodate six conductors.

So can the RJ11 jack.

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?

Yes. That assumes the wiring is correct.

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)?

Yes.
--

JR

Mean Evil Bell System
Historical Society

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.
--
0 days until the winter solstice celebration

Mark Lloyd
http://notstupid.laughingsquid.com

"The government of the United States is not, in
any sense, founded on the Christian religion."
-- George Washington

On Mon, 25 Dec 2006 09:34:58 -0600, Jim Redelfs
wrote:

In article ,
"rb" wrote:

Are RJ11 and RJ14 modular plugs the same size?

Yes.

Do they physically fit the same jack?

Yes.

The RJ14 jack can accommodate six conductors.

So can the RJ11 jack.


It will accept the PLUG but will not make contact with the extra 2
wires.

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?

Yes. That assumes the wiring is correct.

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)?

Yes.
--
0 days until the winter solstice celebration

Mark Lloyd
http://notstupid.laughingsquid.com

"The government of the United States is not, in
any sense, founded on the Christian religion."
-- George Washington

OK. Many thanks.

Seems like the determining factor is how the device jacks are wired and
configured. My sense of how this stuff works is that the jacks ignore
wires that are not there or that are not used by the devices they're in,
assuming the wall jacks are wired right to start with.

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)?

In article ,
Mark Lloyd wrote:
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.


None of the modular plugs have an RJ designation until they are wired
for a specific telephone application.

All 6 position jacks are the same physical size, the number of contacts
determine which applications it can be wired for.

For RJ11, the minimum is 2 contacts.
For RJ12, RJ13, and RJ14, the minimum is 4 contacts.
For RJ25, the minimum is 6 contacts.

RJ11 is used for a single line, pins 3/4.
RJ14 is used for two lines, pins 3/4, and 2/5.
RJ25 is used for three lines, pins 3/4, 2/5, and 1/6.

RJ12 and RJ13 are used for a single line, pins 3/4, with A-lead control
pins 2/5.

RJ12 and RJ13 are not commonly seen, as the 1A2 key systems that they
were used with are largely extinct. Both RJ12 and RJ13 use the second pair
(pins 2/5) for the A lead control, which conflicts with RJ14, which
uses that pair for the second line. A device wired for RJ12 or RJ13 will
short the second line when plugged into a jack wired RJ14.

The difference between RJ12 and RJ13 is that RJ12 bridges the line before
the key system, and RJ13 bridges the line after the key system.


--
-- Welcome My Son, Welcome To The Machine --
Bob Vaughan | techie @ tantivy.net |
| P.O. Box 19792, Stanford, Ca 94309 |
-- I am Me, I am only Me, And no one else is Me, What could be simpler? --

On Mon, 25 Dec 2006 14:42:20 -0600, "rb" wrote:

OK. Many thanks.

Seems like the determining factor is how the device jacks are wired and
configured. My sense of how this stuff works is that the jacks ignore
wires that are not there or that are not used by the devices they're in,
assuming the wall jacks are wired right to start with.


Also, the jacks will accept smaller plugs. The shape of the jack and
plug cause the plug to be centered within the jack, making contact
with the central wires.

I noticed that Lowe's only sells 6P6C phone plugs (all 6 connections
present). These work fine with existing 6P4C (most RJ11) or 6P2C (one
pair only) jacks.
Mark Lloyd
http://notstupid.laughingsquid.com

"The government of the United States is not, in
any sense, founded on the Christian religion."
-- George Washington

On Mon, 25 Dec 2006 19:19:44 -0500, Gary KW4Z
wrote:

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,

True, although the jacks used for telephones are really 6-wire size
with the outer 2 wires missing. These accept 6-wire plugs fine,
connecting to wires 2-5.

4-wire plugs and jacks are smaller, and are used for wired telephone
handsets.

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.


You can probably disconnect the wires outside while working on the
connections.





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)?


Mark Lloyd
http://notstupid.laughingsquid.com

"The government of the United States is not, in
any sense, founded on the Christian religion."
-- George Washington