So im building a wireless network inbetween a couple of apartments near me.

I have all the AP hardware and antennas, have tested the links. All is good.

All i need to find is some way to get a UTP cable, carrying POE aswell as data, through a sliding door and out to the AP.

I have seen this item on slashdot, but have been unable to find anywhere that sells it.

Flatwire have a solution that is due to be released in the American Fall of this year, but it appears to only use a pair of twisted pairs, so is unsuitable for POE use.

Anyone know anywhere that stocks this kind of stuff, or an alternative solution?

Drilling/making holes or trying to squeeze the cable through isn't a viable option.

Power Over Ethernet

So i can power the AP via the ethernet so only one cable needs to be ran to it.

^^ Limted to 14mbps on average tho with POE.

You be better off with Wireless. 54/110MB/s

last edited by 0z at 16:24:29 17/Jun/05

I guess if you can't find that stuff here then you can cut the outside insulator away from normal CAT5 around the area where it has to go through the door and sorta try to make the wires flat and use some superglue to glue the wires together. Superglue might make it a bit hard though, you still want it to be soft I guess. Maybe some other glue??

EDIT: Maybe some silicone instead of the glue.

last edited by Dysard at 16:24:21 17/Jun/05

http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/grc7077/$FILE/power tools - drill.jpg

Flattening / untwisting cat5 will adversly affect it's ability to transmit data. It's twisted for a reason.

er, stinky... got some proof to back up your clames?

Learnt something new, but had a quick read and it shouldn't be a problem if you only do it for a small amount, like to clear a sliding door.

Also saw something (and it's common sense) that UTP is an extreme lightning hazard when outside, so make sure it isn't going to get lit up :)

YAWN

http://www.auspcmarket.com.au/index.php?redir=http://www.auspcmarket.com.au/show_product_info.php?input[product_code]=CS-RC-RET-LAN&input[category_id]=147

http://www.auspcmarket.com.au/index.php?redir=http://www.auspcmarket.com.au/show_product_info.php?input[product_code]=CS-RC-RET-LAN&input[category_id]=147

Aust Pc cat 5 retractable Cable

Fixed.

er, stinky... got some proof to back up your clames?

The cables are entwined to counter signal disruption from external electromagnetic forces. Sifn't know that.

Always make sure to back up your "clames"

we sell those retractable cables at work, but they're crap, they only have 6 wires and somehow do the job of 8...

er, stinky... got some proof to back up your clames?

hahahaha you're not serious are you? Aren't you an electrician or something?

http://en.wikipedia.org/wiki/Twisted_pair

Although for a short distance it would be okay ... just use a cat5 joiner to join either end of a short flat to real cat5 cable. Check Ideal electrical or similar to see if they have flat 4pair cable and just crimp it up yourself.

b2 had some of that flat UTP in Japan, first time I'd seen it. Its frickign awesome.

that was the only thing i could think of. emf being produced by a fluctuating magnetic field. but i fail to see how twisting wires around eachother would help? unless its the hardware that works out whats signle and whats interferance?

b2 had some of that flat UTP in Japan, first time I'd seen it. Its frickign awesome.

awesome, need to get him to post me some back or something.

trent: I could beat u in a fight

Dude cutting the blue plastic and untwisting the cable inside should be fine aslong as its not untwisted for longer than 1/2 inch, or it'll create probs at high bitrates.

Because of limited insulation(they are basicly unshielded), twisting prevents jumps/wierdness/changing of value between wires.
another words electrons can jump/change value between wires if travelling parallel to each other.

so twist so they arnt travelling parallel to each other

we sell those retractable cables at work, but they're crap, they only have 6 wires and somehow do the job of 8...

only 2 of the 4 twisted pairs are used for cat5 dude. still they should still need to be terminated, unless they bounce the 'link signal' back within the head??

Anyone who crimps cat5 should know the importance of the length and which wires should be twisted.
Simply put do as little untwisting of the wire as possible when hooking up heads to cable and shiz.

keep the twisted pairs twisted and no longer than 1/2 inch of untwistedness for high bitrate networks.(100mbit)

last edited by Fuknukle at 19:55:23 17/Jun/05

trent is from NSW he must be a cainer

so twist so they arnt travelling parallel to each other

no, they are now coiled together, which would, if anything, increase the webers produced by the current, which would lead more too "jumps/wierdness/changing" than anything.. unless you have a link that could prove me wrong?

Never mind. it was explained to me.

ok, my understanding (i worked it out myself. im hopeing im right)

http://concyted.ausgamers.com/whitewolf/step1.jpg
http://concyted.ausgamers.com/whitewolf/step2.jpg
http://concyted.ausgamers.com/whitewolf/step3.jpg
http://concyted.ausgamers.com/whitewolf/step4.jpg
http://concyted.ausgamers.com/whitewolf/step5.jpg
http://concyted.ausgamers.com/whitewolf/step6.jpg

just a note. teh "big f***ing field" flow should be in reverse, otherwise the oppisite effect happens..

um, am i right? or did i miss something?

you're an idiot ^^

why is that suhaib?

It's called Unshielded Twisted Pair for a reason.

i need all eight wires and it is going into a sliding door. A door that may or may not be opened multiple times a day.

Untwisted flat solid core UTP isn't going to cut it. It would quickly break and then i am going to have to deal with the possibility of the power from the POE lines touching the data carrying lines and therefore damaging my equipment.

guys, and girls, im not after a dodgey home made fix. Im after something like what i linked to in my original post. If you don't know where to find something like that, don't post in this thread. It is that easy.

drill a hole in the wall. feed it through then?

your dumb

why can't you have another wireless access point and bridge the 2?

why can't you have another wireless access point and bridge the 2?

did you even read the thread?

the cable has to carry POWER! you know, the stuff that makes the AP work.

I.E. IT NEEDS POWER TO WORK, EVEN IF YOU HAVE 2 OF THEM BRIDGED.

f*** you guys are so wrong.

Drill hole through wall if you are renting drill a small neat hole. Just make it so you can hide it when you move out like if it is brick drill through the morter.

Twisted pair is twised for a reason the only differance between cat 3 and cat 7 is the no if twists per m. If you bent the cable too sharply it will permantly damage the simatary of the cable which can greatly reduce the amount of data you can put through it. Which is why it need to be terminated in the correct order otherwise the cable will work at a greatly reduced capacity.

It has 8 wire but only uses 4 wires one pair for tx and one for rx the other 4 are grounded. At my old house there were cat five points arround the house but I wanted a phone point, I was lazy and just took out one of the pairs and ran a the phone through the same cable as the data.

Some facts about twisted pair.

1. The signal sent down the white wire in each pair is not earth (zero), it is a mirror image of the signal sent down the coloured wire. That is, a '1' results in say a +5V signal being sent down the coloured wire, and it also results in a -5V signal being sent down the white wire. Similarly a '0' results in say a -5V signal being sent down the colour wire, and a +5V signal being sent down the white wire.

2. When current flows through a wire that is formed into a coil, it results in a magnetic field in the direction of the axis around which the wire is coiled, that is along the length of the wire. If the current flows in the opposite direction the direction of the magnetic field is still along the wire but in the opposite direction.

Put these two things together and it seems to me that, with opposite currents flowing in each conductor, the magnetic field they produce would be equal but opposite in direction, so the magnetic field from each conductor cancels out the magnetic field from the other conductor.

Another point is that twisted pairs ensure that each conductor is exposed to exactly the same external noise. This is important because the reciever at each end works by taking the value on the coloured wire and subtracting the value on the white wire. So if '1' sent with no noise, the reciever gets +5V on the colour and -5V on the white, so it calculates +5V - -5V = 10V, ie a '1'. If a '0' sent with no noise, the reciever gets -5V on the colour and +5V on the white, so it calculates -5V - +5V = -10V, ie a '0'. However if '1' is sent with +17V noise for example, the reciever gets +22V on the colour, and +12V on the white, so it calculates +22V - +12V = +10V. This is exactly the same result as for no noise, in other words it simply ignores the noise provided it is exactly the same on both conductors.

That is my understanding of why they twist the pairs. If I am wrong let me know.

talkign specificaly in hardware, what device do you know that can subtract 1 voltage from another? although i suppose they have diodes connected to logic gates that give a fairly accurate number, then some sort of logic array would work out the answer. yeah, it makes sense... aww.. i guess i was wrong.. but my explination is better cause it has diagrams! i thought hardware for a while, but i asked someone and they kinda laughed at me. :(

hUON, I'd have to say that is probably the best explanation I have heard in a long time since I was first taught about twisted pair.

Big props mate.

its basically a form of 180 degree phase cancelation of noise in a digital relam, if that helps (or makes sence)

I have cables like these:
http://freetissues.org/hi/cable.jpg

Not sure how these things work, but am using them at 100mbps, and havent had any troubles. If anyone wants to give me money, Ill send you some ..