Is there an adapter or wire that can split an 8 wire RJ45 connection into two rj11?

[High_Jumbllama]

Is there an adapter or wire that can split an 8 wire RJ45 connection into two rj11 4 wire connections?

Reason:
THere are two rj45 connections running through the wall at work from the server room to the front desk. One has been used for network and one for voice.

Now we need/want two phones up front but we do not want to have to run another rj45 wire through the walls and celing if possible.

The idea would be to use one in the server room and one at the connection at the front desk so that one rj45 connection through the wall could act as two rj11 connections.

[Marshmallowman]

I always thought they were and "off the shelf item", but I guess I am wrong the best I could find was

http://search.kelkoo.co.uk/b/a/ss_rj45_to_rj11_convertor.html

Seems the easiest thing to do is just to make yourself rj45 to a 2xrj11 cable

[Helevitia]

My suggestion is to do it yourself. It is fairly easy to do and as long as you don't have to buy the crimping tool(borrow it), then it shouldn't cost too much either.

Dave

[Wombat]

Shouldn't even need a crimping tool. You can get RJ11 self-crimping heads.

[KvHagedorn]

I make these things all the time. The crimping tool is about $35.. is that really a lot? Charge it to your workplace.

Any excuse to get a cool new tool!

[KvHagedorn]

I have the one on top.

http://www.mytoolstore.com/ideal/ide08-01.html

[KvHagedorn]

One thing I use this for is making custom cables for people with dialup modems or fax machines. Swap the wires around when crimping the end on and the device calls out on line 2 or 3 as desired.

[Kurt]

If $35 is too much, there are 5$ RJ-11 plastic crimping tools. If you're a pro you'll absolutely hate them, but for a one in a lifetme job...

[Tjalfe]

Home depot sells female ends which are more or less self crimping.. then just get a regular cable to plug into it

[Dilitante1]

a cheap and easy solution

1. you are already running one cat 5/6 line as a phone, SO take a pair from that line and get one of these:

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=279-411

mount it just below the wallplate you have and you'll be fine. 2 phone lines AND it looks professional

[spadnos]

My $0.02:

Take a short patch cable - like 3 feet or so, and cut it in half. (remember - you need two of these, one in the server room and one in the office)

Buy two of the jacks pointed out by Dilitante1.

On each of the halves of your cable, attach one pair (how about Blue) from the cable to the Red/Green posts on the RJ11 jack , and another pair (say, Orange) to the Yellow/Black posts in the jack. On the second RJ11 jack, use the green pair on R/G, and the blue pair on Y/B. (of course, the actual pairs don't matter much - as long as they're the same on both ends)

Voila - two sets of two-pair RJ11 jacks from one RJ45 jack. If that person changes offices, just move the adapters.

The only tools you need are a pair of wire cutters and a screwdriver (sorry - no new spiffy tools to buy)

Sorry if this was too simplistic of an explanation - I haven't had my coffee yet .

- Steve

edit: removed the second copy of my name, added tool list

[KvHagedorn]

These are the standards to follow. It is best not to deviate from them unless you are forced to.

<table border="1" cellspacing="2" cellpadding="1">
<caption>
Colored pair order in cat5 and 4-wire telco cables.
</caption>
<tr align="center">
<td rowspan="2">
1st pair
</td>
<td>
tip
</td>
<td class="green">
green
</td>
<td class="white">
white/blue
</td>
</tr>
<tr align="center">
<td>
ring
</td>
<td class="red">
red
</td>
<td class="blue">
blue/white
</td>
</tr>
<tr align="center">
<td rowspan="2">
2nd pair
</td>
<td>
tip
</td>
<td class="black">
black
</td>
<td class="white">
white/orange
</td>
</tr>
<tr align="center">
<td>
ring
</td>
<td class="yellow">
yellow
</td>
<td class="orange">
orange/white
</td>
</tr>
<tr align="center">
<td rowspan="2">
3rd pair
</td>
<td>
tip
</td>
<td>
<br />
</td>
<td class="white">
white/green
</td>
</tr>
<tr align="center">
<td>
ring
</td>
<td>
<br />
</td>
<td class="green">
green/white
</td>
</tr>
<tr align="center">
<td rowspan="2">
4th pair
</td>
<td>
tip
</td>
<td>
<br />
</td>
<td class="white">
white/brown
</td>
</tr>
<tr align="center">
<td>
ring
</td>
<td>
<br />
</td>
<td class="brown">
brown/white
</td>
</tr>
</table>

[High_Jumbllama]

I've already got the idea down. I already took one of the CAT 5E patch cables we have way too many of and cut it in half to use for the two rj45 ends. I am then going to wire the other ends into two two port surface mount rj11 boxes. Therefore. I can easilly plug in any length phone cords at either end as needed. Due to having a patch panel to deal with I realized I will have to use phone lines in the server room as well as the other location. I am either exactly right or exactly wrong in which case I would just use the normal patch cables.

[Kurt]

Make sure your cables match. Don't forget about the "twisted pair" thingy.

[High_Jumbllama]

Got it right the first time! I ended up using the RJ45 ends and two rj11 two port surface mount boxes. Then I can plug in any length rj11 for however long the phones have to reach.

Adapter1 Jack1:
Black - Blue
Red - Blue White
Green - Green
Yellow - Green White
Adapter1 Jack2:
Black - Brown White
Red - Brown
Green - Orange White
Yellow - Orange

Adapter2 Jack1:
Black - Green White
Red - Green
Green - Blue White
Yellow - Blue
Adapter2 Jack2:
Black - Orange
Red - Orange White
Green - Brown
Yellow - Brown White