Single CAT5E cable for Phone and LAN?

Phil99

Phil99

Phil99

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29 Oct 2004
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Is it possible to run these 2 signals down a single cable? I think I read in the past there is an unused pair in a CAT5E core so it would be possible for me to use this to send a (filtered) phone line through it?

Reason I ask is because since setting up the router downstairs I've gained about 1500kbps and CRCs are greatly reduced, but I'd prefer it if we only had 1 cable going up the stairs rather than 2 (Phone and LAN)

I've found wiring diagrams for RJ45 but not what each pair is used for.
 
As long as you're not planning on running GigE over the Cat 5E then yeah, it'll work fine. The orange and green pairs will be used for 100Mbit if you're using 568B.
 
Reason I ask is because since setting up the router downstairs I've gained about 1500kbps and CRCs are greatly reduced, but I'd prefer it if we only had 1 cable going up the stairs rather than 2 (Phone and LAN)
Click to expand...

You could use wireless, that would reduce it to 1. Or get a phone with multiple basestations which would remove the need to have a phoneline upstairs (both solutions are cheap)

Obviously having both would mean 0 lines running upstairs, which would be even better.
 
It looks like the blue pair isn't used (4 & 5) so I assume it'd simply be a case of connecting up 4 -> 2 and 5 -> 5 going from RJ45 -> BT Phone type plugs?

I've got a 15m CAT5E cable arriving soon along with a BT phone extension (for the plugs.)

Plan is to cut off the plugs on the extension to the required length (+ a bit for error), strip away a bit of the insulation on the RJ45 cable, cut the blue pair, strip them down, solder to plug from phone extension, tidy everything up with insulation tape and job done?

RJ45Phone.PNG


I know the diagram is a bit poor, but each colour is meant to represent a pair.

From the link provided by basmic I'm using 568-B Wiring.
 


The NIC transmits on pins 1 and 2, and recieves on pins 3 and 6. This is assuming half duplex none Gigaspeeds. It leaves you with pins 4, 5, 7, 8 to play with :)

You can use any of the either models, but if you use T568A on one end, you have to use it on the other end. You can't use both T568A/B at the same time :) Using either standards will not give performance drops/gains, just different ways of wiring up.
 
Got the CAT5E cable and 5m phone extension today, had it up and running in about 20min :)

Was very simple, I just sliced open the CAT5 about a meter away from the plug, cut & stripped down the blue pair, cut the 5m phone extension in half, soldered the correct wires together, tidied up with electrical tape and it's working perfectly :D

Thanks for the help
 
Phil99 said:
Got the CAT5E cable and 5m phone extension today, had it up and running in about 20min :)

Was very simple, I just sliced open the CAT5 about a meter away from the plug, cut & stripped down the blue pair, cut the 5m phone extension in half, soldered the correct wires together, tidied up with electrical tape and it's working perfectly :D

Thanks for the help
Click to expand...

Did my diagram come in help then? :)
 
Hi

Been reading about this myself but not had the balls to do it just yet.

Im replacing my master socket with an XTE 2005 soon:
http://www.adslnation.com/phpapps/catalog/product_info.php?cPath=24&products_id=105

From what my friends have told me.

I simply stick that on my main master socket.

Then i have a telephone cable going upstairs to my pc.


From what i have read then, i could actually just run a cat5 cable instead of the telephone cable?


This might sound dumb but what do you do to get it plugged into your router (with the different shaped connector).


I think im confusing too many things with this.
Is it even worth it?

Reason i got interested was because the telephone extension we use was quite old and recently got 8meg broadband so hoping to get the max 8 or near to so wanted to replace all cables.

Thanks!
Mike
 
My setup now goes:

Master socket -> Microfilter

Then from the phone side of the Microfilter I have a 2x BT Phone adapter, one port goes to the downstairs phone, the other to the upstairs phone

On the ADSL side of the Microfilter I have the Router plugged direct.

I then take the network side of the modem to a switch upstairs via the RJ45 cable, and also run the second phone output through a spair pair in the RJ45 cable.

This means I can have a phone and use the internet upstairs without having to run the Router on an extension cable or use wireless.

A filtered faceplate would do just the same as my microfilter but probably higher quality.

Where are your phones & pc(s) in relation to the master socket?
 
Right ok.
(Sorry for the thread hijack btw)

Master socket.
This has a microfilter plugged in.
However i plan to replace with this:
http://www.adslnation.com/phpapps/catalog/product_info.php?cPath=24&products_id=105
Which should just get rid of the need for that microfilter.

Anyway.
From that micro filter one part goes to the downstairs phone.
The other goes all through the garage and upstairs to the PC room (straight into the router)

The master socket also has a part hard wired, which goes to an upstairs telephone.


The main bit of worry for me is that long one going through the garage to the pc room. I only want to change that one really is possible?


Hope that makes sense!

The pc one has to travel quite a distance, i remember we struggled to buy the cable ages ago as it was above the standard lengths.
 
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