Extend phone line with CAT5 cable

A phone line isn't long enough to the conference cable.  So I would like to extend it with a cat 5 cable.  

However, there is some type of module connected to the end and the wires are colors I am not familiar with.  When I take the module off I'll have five colors: Green, Brown, White, Red, Blue, and Black.  It looks like the white and green are used primarily.

Which wire colors would I use on a normal cat5 cable, to connect with this legacy cable?  

A picture is attached so you can see what I am working with.  
At the end of the cat 5 I need it crimped to a RJ11 since it is a POTS line.
add cat 5 cable to this end and a rj11 at the other.
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RED / GREEN is tip and ring for line 1  Yellow / Blk tip and ring for Line 2.  So you can use any of the 8 wires in a CAT V cable for the 4 wires on the phone just make sure the ends match up should not need to cross any wires.  Note some Telco hardware is sensitive to the tip / ring orientation but most aren't
It does not matter what colors you are using as long as it is consistent (the same wire color on both sides).
JohnBusiness Consultant (Owner)Commented:
It does not matter what colors you are using as long as it is consistent

Yes, and I think you are better off to get standard telephone twisted pair made for the job. It is solid conductor and easy to strip and connect.
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Steven CarnahanNetwork ManagerCommented:
Based on the picture this is a standard analog phone that uses only 2 wires.  The pop-up description says that you need an RJ11 on the other (unseen) end that I guess is the physical phone?  If that is the case then it looks like a standard CAT3 telephone wire will do the trick with an RJ11 on both ends. You can plug an RJ11 in to a CAT5 jack

Usually an analog connection uses 2 wires but there are 4. The purpose is explained in the first comment by tmoore1962 above.

The flat ribbon cable that is in the picture is actually a 4 wire phone cable (CAT3) with an RJ45 crimped on.
If using RJ11 (2 wire standard) use RED/GREEN pair...

If using RJ14 (4 wire standard) use RED/GREEN pair in the MIDDLE connectors (LINE 1), and YELLOW/BLACK on the OUTER connectors (LINE 2).

See: http://www.ehow.com/how_10013113_convert-rj45-rj11.html

(RJ45 is the 8 wire standard for Ethernet with Cat-5 or 6 wire)
Fred MarshallPrincipalCommented:
It is typical in construction to use solid copper CAT5E for everything, including telephones.
Good practice makes sure that the cables for network and telephone are separate and, one would hope, different jacket colors.  
Blue (for Red) / Blue-White (for Green) are connected to the center-most pins on an RJ-45 and the same convention can be used (and is used) for telephones going into the center-most pins on an RJ-11.

Now, I am partial to EIA 568B so the next centermost pins on an RJ-45 are Green / Green-White.
This corresponds to Green (for Yellow) and Green-White (for Black) on an RJ-11.

But gosh, the pin numbers are crazy-making if you try to keep it all straight.
1 2 3 4 5 6 7 8
x x 1 2 3 4 x x
RJ11 (I don't know another number for this one):
x 1 2 3 4 5 6 x
So, the primary telephone line might be wired to:
45 on RJ45
23 on RJ11 (4pin)
34 on RJ11 (6pin)

The only reason any of this might be important is if you were using a cable that's already terminated with a plug on one end.  Otherwise, I'd use any twisted pair for each telephone line and keep the wires matches as expected.

Pages like this one can be useful:
Steven CarnahanNetwork ManagerCommented:
Looking closer at the wiring in the biscuit jack it clearly is using the red/green pair only. The standard I have usually seen/used is the red/green pair is the center 2 pins and the black/yellow are the next pin pair out.  This picture makes it look like it may be reversed.

In either case, using a standard telephone cable with RJ11 on both ends should allow the phone to function properly.
miketech99Author Commented:
I had no idea this cable can be used for two lines.  Which wires in the cable can be connected to one jack and other wires connected to another jack for two separate lines? Image showing each side of the jack.
Steven CarnahanNetwork ManagerCommented:
That looks like a Leviton 41106-RW6 jack.  The numbers on the sides represent the pin locations. So if the biscuit jack is wired properly then you would have the single line currently wired going to pins 3 and 4. (The red/green) which would match in the Leviton on pins 3 and 4. If you look at the colors above the numbers on the Leviton they should match up as well with red above 3 and green above 4.

So basically, if you had the second line hooked up (it isn't in the biscuit jack currently) they would be the Black/Yellow pair or pins 2 and 5.

Does that help?

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Fred MarshallPrincipalCommented:
The jack is a 6-pin jack so it can support 3 lines (2 wires each).
By convention or standard, the lines are connected at pins 3-4, 2-5,1-6.

A "2-line" jack with 4 pins will have "Line 1" on pins 2-3 and "Line 2" on pins 1-4.

So, 4-pin or 6-pin, the idea is the same but the pin numbers are different.

If you have a 2-line telephone with a 4-pin plug, it will hook right up to either a 4-pin or 6-pin jack if the jacks are wired as above.  The standard is very common.  Probably has a name or a number......  :-)
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