I want to split one network cable into two

[lokiju]

Is there any cheap solution that'll enable me to do this?

EDIT:

Basically, I have in my living room a cat 5e jack with my standard rj11 jack for phone pulled to basically behind where the couch sits, the issue is that it's on the opposite side of the room that I need it.

The home is pre-wired to a few rooms but what I want to do is get a cat 5 cable down the wall on the other side to come out by my coax since I need a wired connection for my media center.

All the cat 5 for the house runs through the attic and then down the walls to each room and all comes back to a patch panel in the garage. I was just trying to see if there was an easy way to jump off of one of those cables so I don't have to do a full home run pull for the additional connection I want and since it'd be in the attic that I would have wanted to do that split, I wouldn't have had access to a power outlet for a switch.


But I've come up with an easier solution of just pulling up the cat 5 from the master bed room and then dropping down the wall I need it for in the living room since I have the home covered in wi-fi and have no need for a wired connection in the master bedroom.

 

[KLin]

http://forums.anandtech.com/ca...tid=36&flcache=8509608

 

[pstylesss]

Nope, there isn't. Not to my knowledge at least.

 

[Pepsi90919]

what, with cat5? the orange and green pair are one network and the blue and brown are another.

 

[pstylesss]

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

Does he mean cut a 50ft in half for 2x25 or use a splitter like line 1 + 2 with a phone cord?

 

[akshatp]

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

I dont think that is correct. IIRC you need all 4 pairs to make a network connection work

 

[Kadarin]

If you take a pair of wire cutters to a cat5, then crimp new RJ45's on the two new ends, you'll have two network cables.

 

[fh99]

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

 

[Zim Hosein]

Originally posted by: lokiju

Topic Title: I want to split one network cable into two
Topic Summary: with something that doesn't require power.

Is there any cheap solution that'll enable me to do this?

I'm as to what lokiju is asking

 

[Anubis]

he wants a router or hub that isnt powered

IDK why no one understood that


and AFAIK no you cant do it

 

[Pepsi90919]

Originally posted by: akshatp

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

I dont think that is correct. IIRC you need all 4 pairs to make a network connection work

i know it is correct.

 

[Pepsi90919]

Originally posted by: Anubis
he wants a router or hub that isnt powered

IDK why no one understood that


and AFAIK no you cant do it

no, that would be read as "i want to split one network into two" not "i want to split one network cable into two" as my solution provides for

 

[Crucial]

There's got to be some sort of switch thats powered over ethernet. I've never seen one but I would think somebody's made one.

What are you trying to run where there is no power? and why can't you run 2 cables?

 

[jersiq]

Originally posted by: Pepsi90919

Originally posted by: akshatp

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

I dont think that is correct. IIRC you need all 4 pairs to make a network connection work

i know it is correct.

I don't know if I am misreading you, or you have no clue about cabling.
How exactly do you split the two wires from the jacketing without failing to conform to the EIA/TIA published standards. (There is a lot more literature out there saying you need all the pairs terminated in the same sleeve, but this standard will suffice)

If I'm misreading then have a :beer: on me

:edit: Oh Yeah OP, there are some devices out there that conform to 803.3af (Power over Ethernet) however, your powered side has to be compliant with 802.3af also.

 

[Aves]

You want a passive hub. They're pretty cheap if you can find one.

Actually if it's just one connection you could probably just get an RJ-45 splitter.

 

[TruePaige]

Originally posted by: jersiq

Originally posted by: Pepsi90919

Originally posted by: akshatp

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

I dont think that is correct. IIRC you need all 4 pairs to make a network connection work

i know it is correct.

I don't know if I am misreading you, or you have no clue about cabling.
How exactly do you split the two wires from the jacketing without failing to conform to the EIA/TIA published standards. (There is a lot more literature out there saying you need all the pairs terminated in the same sleeve, but this standard will suffice)

If I'm misreading then have a :beer: on me

It'd be a cable-y mess, and you'd need to resleeve, but only half the pairs are needed to carry the signal, the rest are there to counteract interference / act as redundancy.

So I suppose you could split a cable into half pairs to carry an identical signal, though you'd have a laundry list of problems with that in practice unless you live in an interference free area =p

 

[jersiq]

Originally posted by: TruePaige

Originally posted by: jersiq

Originally posted by: Pepsi90919

Originally posted by: akshatp

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

I dont think that is correct. IIRC you need all 4 pairs to make a network connection work

i know it is correct.

I don't know if I am misreading you, or you have no clue about cabling.
How exactly do you split the two wires from the jacketing without failing to conform to the EIA/TIA published standards. (There is a lot more literature out there saying you need all the pairs terminated in the same sleeve, but this standard will suffice)

If I'm misreading then have a :beer: on me

It'd be a cable-y mess, and you'd need to resleeve, but only half the pairs are needed to carry the signal, the rest are there to counteract interference / act as redundancy.

So I suppose you could split a cable into half pairs to carry an identical signal, though you'd have a laundry list of problems with that in practice unless you live in an interference free area =p

No one even knows if he is using cat 6 for GigE or not, in which case you need all 4.

 

[ppdes]

The Google results are interesting at least:
http://www.zen22142.zen.co.uk/.../Interface/pethhub.htm

A lot of them talk about running in half duplex mode instead of full.

 

[Mutilator]

You can split a single Cat5 cable into 2 cables - like has already been said you can use 2 pairs for one, 2 pairs for the other and recrimp ends on them. You could also make 4 phone cords if you wanted to. It gets messy, and isn't really recommended... but it can be done.

But unless you already have RJ45 ends, a good cable crimper, and possibly a cable tester you'd come out cheaper just buying a switch.

 

[ScottMac]

Well, so far, a couple people *ALMOST* have it right.

First, there are no "passive hubs (or switches)" for Ethernet so forget that crap. Codenoll once made a passive OPTICAL Ethernet hub, which was pretty clever, and used in the Navy shipboard.

There are four pair in the average Cat{anything}-rated UTP cable (UTP: = Unshielded Twisted Pair). The Pair are colored Orange, Green, Blue and Brown.

10BASE-T, 100BASE-Tx and generally any 10/100 port uses two pair, the Green and the Orange (in EIA/TIA 568a pinouts, pair two is Orange, Pair three is Green ... for EIA/TIA 568b, it's the opposite, but it's always the Orange and Green Pair)

It is possible to run two seperate network connections over th esame cable (for 10/100) BUT IT NOT RECOMMENDED because, up to and including CAT5, the Blue/Brown pairs are not "qualified" for the high speed data. The individual conductors, and the discreet pair will interfere with each other and cause you to post another message asking why your performance sucks.

You cannot connect two hosts to the same two pair (i.e., two hosts in parallel on the same connection) ... well, you can, but it won't work (you can jump off a three story building naked too, but you usually regret it if you live ... )

The whole idea for UTP networking (these days) is one connection, one host (or a trunk to another ACTIVE component with one connection / one host)

Next, Gigabit Ethernet uses all four pair, going both ways (transmit & receive), at the same time. It's magic.

Although the original GigE was built to work over plain old Cat5 (only two qualified high-speed pair), Cat5e was introduced .... it has all four pair qualified for high-speed data in both directions. Cat6 improves on the performance and will work OK for short runs of 10GigE. Cat6a, when it's ratified will "probably" handle full-length runs (~ 90 Meters) of 10GigE.

So, the one, true, standards, guidelines, and recommendations-compliant answer to the OP is No (Not really just no, but "F*ck No").

If you run two 10Mb or 100Mb connections through the same cable (assuming you do it right), will "work" ... performance will suck mightily, but in a pinch, it's do-able.

If you connect two things onto the same single connection, it won't work at all, and you may damage some chips (i.e., screw the whole system and you'll need to buy something).

Good Luck

Scott

 

[Kelemvor]

Must not be that important since the OP hasn't come back to post since starting the thread to say why it can't have power and such. I'd go for power over the LAN connection. You can either get a switch that supports or or get an adapter that splices the power onto the LAN line and then another at the far end to splice it back out and then plug into the switch.

http://www.amazon.com/Linksys-...-Adapter/dp/B0000Y7W98

 

[RadiclDreamer]

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

Dead wrong

 

[Kelemvor]

Originally posted by: RadiclDreamer

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

Dead wrong

Wrong but you could make them into that if you wanted to. You could take a cable apart and crimp two ends on it as long as you get the cables in the right places. Then do the same on the other end and plug it into two ports of a switch and it'd work.

Wouldn't be the best connection and might have interference and such but it's possible.

 

[Zim Hosein]

Originally posted by: ScottMac
Well, so far, a couple people *ALMOST* have it right.

First, there are no "passive hubs (or switches)" for Ethernet so forget that crap. Codenoll once made a passive OPTICAL Ethernet hub, which was pretty clever, and used in the Navy shipboard.

There are four pair in the average Cat{anything}-rated UTP cable (UTP: = Unshielded Twisted Pair). The Pair are colored Orange, Green, Blue and Brown.

10BASE-T, 100BASE-Tx and generally any 10/100 port uses two pair, the Green and the Orange (in EIA/TIA 568a pinouts, pair two is Orange, Pair three is Green ... for EIA/TIA 568b, it's the opposite, but it's always the Orange and Green Pair)

It is possible to run two seperate network connections over th esame cable (for 10/100) BUT IT NOT RECOMMENDED because, up to and including CAT5, the Blue/Brown pairs are not "qualified" for the high speed data. The individual conductors, and the discreet pair will interfere with each other and cause you to post another message asking why your performance sucks.

You cannot connect two hosts to the same two pair (i.e., two hosts in parallel on the same connection) ... well, you can, but it won't work (you can jump off a three story building naked too, but you usually regret it if you live ... )

The whole idea for UTP networking (these days) is one connection, one host (or a trunk to another ACTIVE component with one connection / one host)

Next, Gigabit Ethernet uses all four pair, going both ways (transmit & receive), at the same time. It's magic.

Although the original GigE was built to work over plain old Cat5 (only two qualified high-speed pair), Cat5e was introduced .... it has all four pair qualified for high-speed data in both directions. Cat6 improves on the performance and will work OK for short runs of 10GigE. Cat6a, when it's ratified will "probably" handle full-length runs (~ 90 Meters) of 10GigE.

So, the one, true, standards, guidelines, and recommendations-compliant answer to the OP is No (Not really just no, but "F*ck No").

If you run two 10Mb or 100Mb connections through the same cable (assuming you do it right), will "work" ... performance will suck mightily, but in a pinch, it's do-able.

If you connect two things onto the same single connection, it won't work at all, and you may damage some chips (i.e., screw the whole system and you'll need to buy something).

Good Luck

Scott

That's a lot of info I must say, including the "magic" of GigE!

Cheers Scott :beer:

 

[Pepsi90919]

Originally posted by: jersiq

Originally posted by: TruePaige

Originally posted by: jersiq

Originally posted by: Pepsi90919

Originally posted by: akshatp

Originally posted by: Pepsi90919
what, with cat5? the orange and green pair are one network and the blue and brown are another.

I dont think that is correct. IIRC you need all 4 pairs to make a network connection work

i know it is correct.

I don't know if I am misreading you, or you have no clue about cabling.
How exactly do you split the two wires from the jacketing without failing to conform to the EIA/TIA published standards. (There is a lot more literature out there saying you need all the pairs terminated in the same sleeve, but this standard will suffice)

If I'm misreading then have a :beer: on me

It'd be a cable-y mess, and you'd need to resleeve, but only half the pairs are needed to carry the signal, the rest are there to counteract interference / act as redundancy.

So I suppose you could split a cable into half pairs to carry an identical signal, though you'd have a laundry list of problems with that in practice unless you live in an interference free area =p

No one even knows if he is using cat 6 for GigE or not, in which case you need all 4.

he didn't even say anything about ethernet, or even if 'he' is really a 'he'. i was assuming all sorts of things.