ethernet cable - Page 1
Forum section: electronics / beginners

author: christos10
author_rank: Contributor
timestamp: December 05, 2014, 04:24:34 pm
content: i have a 50 meter phone cable,,,,twisted and shelded,,,i know that in ethernet cables we use only 4 wires (2 for tx and 2 for rx)my cable have 6 cables in it (3 pairs of 2 twisted)...can i use it for ethernet cable?

author: dr.diesel
author_rank: Super Contributor
timestamp: December 05, 2014, 04:53:14 pm
content: 100BT only uses two pairs, gigE uses all 4.If this cable is already in a wall or something and you'd like to use it, give it a shot.

author: christos10
author_rank: Contributor
timestamp: December 05, 2014, 04:57:54 pm
content: its not on a walli have a lab 30 m away from my router,,,,im using wifi but its to slow + theres a wall between my router and the lab

author: dr.diesel
author_rank: Super Contributor
timestamp: December 05, 2014, 05:00:52 pm
content: Only way your gonna know for-sure, is to try it.

author: christos10
author_rank: Contributor
timestamp: December 05, 2014, 05:05:07 pm
content: in theory should it work?

author: dr.diesel
author_rank: Super Contributor
timestamp: December 05, 2014, 05:07:00 pm
content: Likely will work yes.

author: christos10
author_rank: Contributor
timestamp: December 05, 2014, 05:12:40 pm
content: ok thx will try and respond the results

author: SeanB
author_rank: Super Contributor
timestamp: December 05, 2014, 05:15:23 pm
content: 3 pairs of 600R twisted pair. It will most likely work at 10M, but at 100M it will be very dicey. You would have to lock one end to 10M to get it to work reliably. Can you not just use it to act as a pull through to get some CAT5 ethernet cabling through?

author: madires
author_rank: Super Contributor
timestamp: December 05, 2014, 05:17:08 pm
content: For telephone wire you could assume Cat3, i.e. 10BaseT. For more throughput use a pair of DSL modems (master and slave).

author: Howardlong
author_rank: Super Contributor
timestamp: December 05, 2014, 05:31:06 pm
content: Male sure you put it the right way around, it makes a huge difference you knowhttp://www.chord.co.uk/blog/new-chord-ethernet-cables/

author: dfmischler
author_rank: Frequent Contributor
timestamp: December 05, 2014, 05:42:29 pm
content: Quote from: madires on December 05, 2014, 05:17:08 pmYes, but you might be surprised at what will actually work. I have a 50m or so run of direct burial shielded category 3 (3 pair, no less) between my house and barn that runs 100baseTX just fine.

author: christos10
author_rank: Contributor
timestamp: December 05, 2014, 06:09:18 pm
content: Quote from: dfmischler on December 05, 2014, 05:42:29 pmso you have done it?

author: madires
author_rank: Super Contributor
timestamp: December 05, 2014, 06:17:30 pm
content: Quote from: dfmischler on December 05, 2014, 05:42:29 pmYou're luckyHave you checked the error counters, especially FCS?

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 05, 2014, 06:35:40 pm
content: Quote from: Howardlong on December 05, 2014, 05:31:06 pmWe must assume you are joking. Which "direction" should you deploy a cable which BY DEFINITION carries data in BOTH directions?Besides, they don't even know how to spell "cord". Save us from yet another snake-oil vendor of boutique "magic" cable. These people have no ethics.

author: dfmischler
author_rank: Frequent Contributor
timestamp: December 05, 2014, 07:25:11 pm
content: Quote from: madires on December 05, 2014, 06:17:30 pmNaw, what for? I'm not depending on it for anything important. It runs good enough for file transfers and checking the environmental controls in the kennel. I'm sure it's not as good as cat5e would be. When it was time to run power and water to the barn I told the contractor to "throw some phone wire in the hole". So I was thrilled that it ran ethernet at all.

author: dfmischler
author_rank: Frequent Contributor
timestamp: December 05, 2014, 07:35:19 pm
content: Quote from: christos10 on December 05, 2014, 06:09:18 pmYes, but that does not provide any guarantee that your cable will work. Mine has a jacket made for direct burial, it is gel-filled to prevent water damage, and it has a copper clad steel gopher shield. I can't remember who made it, but it was installed around 1999.

author: christos10
author_rank: Contributor
timestamp: December 05, 2014, 07:59:13 pm
content: its this cablelets say i use this,,,will i lose speed? get more ping?

author: Monkeh
author_rank: Super Contributor
timestamp: December 05, 2014, 08:01:27 pm
content: Either try it or go buy some appropriate cable.

author: dr.diesel
author_rank: Super Contributor
timestamp: December 05, 2014, 08:02:02 pm
content: Takes < 5 min to test, give it a go and see what happens!

author: christos10
author_rank: Contributor
timestamp: December 06, 2014, 04:39:42 pm
content: thx,,its working with no ping....

author: Howardlong
author_rank: Super Contributor
timestamp: December 06, 2014, 05:11:08 pm
content: Quote from: Richard Crowley on December 05, 2014, 06:35:40 pmBut there's more data flowing one way that the other, so the end which sends more data should always be physically located higher than the other end. You save money on your electricity bill doing that, letting gravity take the strain.If there is a an impedance bump caused by putting the cable over a wall or something, you can help the data flow by sucking on the downstream end RJ45* before plugging it into the receiving device. Using siphon technology you can fix no end of cabling problems. Another way to do this is to blow on the upstream end immediately before plugging it in.* this is not to be done on PoE equipped network cabling.

author: mrflibble
author_rank: Super Contributor
timestamp: December 06, 2014, 05:20:53 pm
content: What does no ping mean? Zero latency for the icmp response packet? Awesome, where do I get me some of that?Anyways, as has already been suggested: 10 Mbit ... probably, 100 Mbit ... maybe. If you can get it to negotiate a stable link, then run a test for a few days and see how many dropped packets you get. If you get low packet drop at 100 MBit, then congrats!

author: Zero999
author_rank: Super Contributor
timestamp: December 06, 2014, 05:32:08 pm
content: Quote from: Howardlong on December 06, 2014, 05:11:08 pmLol.

author: madires
author_rank: Super Contributor
timestamp: December 06, 2014, 07:14:22 pm
content: Quote from: christos10 on December 06, 2014, 04:39:42 pmSome computers/devices filter echo requests by default.

author: extide
author_rank: Regular Contributor
timestamp: December 07, 2014, 05:40:03 am
content: Quote from: Richard Crowley on December 05, 2014, 06:35:40 pmI am sure he meant to use the pairs correctly, as in make sure pins 1 and 2 are one pair, and 3 and 6 are another pair, and not some other way around.

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 07, 2014, 05:44:22 am
content: Quote from: extide on December 07, 2014, 05:40:03 amYou don't have to buy "premium" network cable to get the wiring right.

author: extide
author_rank: Regular Contributor
timestamp: December 07, 2014, 05:46:17 am
content: Quote from: Richard Crowley on December 07, 2014, 05:44:22 amWell, looking at the link now, yeah, that is pure bs.

author: Zero999
author_rank: Super Contributor
timestamp: December 07, 2014, 06:26:09 pm
content: Quote from: Richard Crowley on December 05, 2014, 06:35:40 pmThey mean chord as in music, which is totally different to a length of cord.Quote from: Howardlong on December 06, 2014, 05:11:08 pmShit, I just realised, it looks like you were serious. Of course, the earth's gravity has no effect on the propagation of a signal down a length of cable. Please keep the audiophool stuff off here!

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 07, 2014, 06:40:43 pm
content: Quote from: Hero999 on December 07, 2014, 06:26:09 pmYes, we all know that. And that has something to do with digital cabling how, exactly?QuoteEven audiophools aren't that phoolish, are they?

author: IanB
author_rank: Super Contributor
timestamp: December 07, 2014, 07:26:25 pm
content: Quote from: Hero999 on December 07, 2014, 06:26:09 pmLook, there's satire, and perhaps there can be meta-satire. But when it comes to meta-meta-satire it's going too far. Stop it please.

author: Zero999
author_rank: Super Contributor
timestamp: December 08, 2014, 02:28:10 pm
content: Quote from: IanB on December 07, 2014, 07:26:25 pmThe trouble is it can often be difficult to distinguish between satire and an article which may be intended to be serious but is so false it's absurd.

author: christos
author_rank: Regular Contributor
timestamp: December 08, 2014, 06:46:22 pm
content: well ,,im in greece and i have a 8mbps internet,,,,if i test the speed with Speedtest.net with a standard 1m ethernet cable im getting 7.1 mbps and 39 ping,,,with the phone cable in 50m im geting 6.8mbps and 44 ping,,,so im happy with that,,for me its no loss with 10 euro cable

author: Howardlong
author_rank: Super Contributor
timestamp: December 08, 2014, 07:21:06 pm
content: Quote from: Richard Crowley on December 07, 2014, 06:40:43 pmI'm not a betting man, but I'd hazard a guess that anyone who'd burn £3,200 (~$5,000 US) on a 3 metre patch cable might have a bit of a problem, and it won't be because they've plugged it in the wrong way around.

author: rob77
author_rank: Super Contributor
timestamp: December 08, 2014, 08:55:28 pm
content: actually the phone twisted pair , or cat3 cables (they're marked as SYKFY in my country) are good enough for short ethernet conncetions but ONLY If THERE IS DEFINITELY NO OTHER OPTIONthe cost of a 4 x 2 x 0.5 Cat3 is the same as for the Cat5 ethernet cable, so there is really no reason to use cat3. and of course 100Mbit is troublesome (in other words.. almost unusable) on longer Cat3 cables.

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 08, 2014, 10:15:05 pm
content: They can't spell "cord" and apparently they have problems with "array" as well. A prime exhibit of audiophoolishness!