RE: cable testing?
Most of the electrical wholesalers stock satelite, audio, network gear now days Maurice > -Original Message- > From: Hadley Rich [mailto:h...@nice.net.nz] > Sent: Thursday, 4 March 2010 8:48 p.m. > To: linux-users@it.canterbury.ac.nz > Subject: Re: cable testing? > > > On Thu, 2010-03-04 at 19:43 +1300, Ryan McCoskrie wrote: > > Dad (who has been doing this as a living since I was born) says to > > talk to Shane at Rexel. > > Yeah, I buy all that sort of stuff off Rexel too. > > hads > > -- > http://nicegear.co.nz > New Zealand's Open Source Hardware Supplier >
Re: cable testing?
On Thu, 2010-03-04 at 19:43 +1300, Ryan McCoskrie wrote: > Dad (who has been doing this as a living since I was born) says to > talk to Shane at Rexel. Yeah, I buy all that sort of stuff off Rexel too. hads -- http://nicegear.co.nz New Zealand's Open Source Hardware Supplier
Re: cable testing?
On Thursday 04 March 2010 02:28:11 pm you wrote: > On Thu, Mar 4, 2010 at 10:01 AM, Ryan McCoskrie > > wrote: > > On Tuesday 02 March 2010 09:49:26 pm Nick Rout wrote: > >> I have run a couple of cat5e cables and I am trying to terminate them, > >> unsuccessfully at present. > > > > ... What is your terminating process like? I've done a little for my Dad > > and it's dead easy (about half of a room at Lincoln High). Has anyone > > shown you how to do it in person? Are you using good parts? > > Thanks for all the replies. I am running single cored cat5e and > terminating with RJ45 plugs supplied by DSE with a crimp tool also > supplied by DSE, (similar to the T2923 in their current stock.) I have > used the same cable, plugs and tool before and got good results. > Dad (who has been doing this as a living since I was born) says to talk to Shane at Rexel.
Re: cable testing?
On Thu, Mar 4, 2010 at 4:13 PM, Craig Falconer wrote: > Christopher Sawtell wrote, On 04/03/10 14:42: >> >> > Stop - first check you have plugs that match your cable. RJ45 plugs >> for >> > solid do not work well on stranded and vice versa. >> How do you tell the difference? > > Without trying to be funny - you read the label. Someone should tell DSE to label theirs properly then! > > The actual physical difference is the shape of the cutting/gripping edge on > each metal spade, and the cost is almost 1/3 more for stranded plugs. > > > EG > http://www.cdlnz.com/index.html?do=viewproduct&code=RJ-45%20R%20LD&ID=2689410 > DYNAMIX RJ-45 8P8C Modular Plug (Round, Stranded) - 50 micron Latch Down > Clip > 40 cents each ++ > > > http://www.cdlnz.com/index.html?do=viewproduct&code=RJ-45%20SR&ID=2689415 > DYNAMIX RJ-45 8P8C Modular Plug (Round, Solid) - 50 micron > 25 cents each ++ > > > > > -- > Craig Falconer > >
Re: cable testing?
Christopher Sawtell wrote, On 04/03/10 14:42: > Stop - first check you have plugs that match your cable. RJ45 plugs for > solid do not work well on stranded and vice versa. How do you tell the difference? Without trying to be funny - you read the label. The actual physical difference is the shape of the cutting/gripping edge on each metal spade, and the cost is almost 1/3 more for stranded plugs. EG http://www.cdlnz.com/index.html?do=viewproduct&code=RJ-45%20R%20LD&ID=2689410 DYNAMIX RJ-45 8P8C Modular Plug (Round, Stranded) - 50 micron Latch Down Clip 40 cents each ++ http://www.cdlnz.com/index.html?do=viewproduct&code=RJ-45%20SR&ID=2689415 DYNAMIX RJ-45 8P8C Modular Plug (Round, Solid) - 50 micron 25 cents each ++ -- Craig Falconer
Re: cable testing?
> I know I should be terminating with a socket and then running a short > cable to the equipment at each end, but I wanted a quick and dirty > until I have time to do it right. It has worked that way before. This could (maybe) be your problem. The cable used for permanent wiring is single core as opposed to the multistranded "flex" used for patch cables. The single strands can easily break at the plug. The plugs are different also for solid or stranded and some suppliers (especially DSE shop assistants) do not have a clue about it. If you don't believe me try asking a reputable data cabling firm. Rob
Re: OT: Telecom Proxy servers?
Telstra subject their cable customers to a transparent proxy as well. Their proxy behaves when told to get the uncached version of an object thankfully. - neil On Thu, Mar 04, 2010 at 01:00:40PM +1300, Craig Falconer wrote: > CABLE CABLE CABLE! >
Re: cable testing?
On Thu, Mar 4, 2010 at 2:42 PM, Christopher Sawtell wrote: >> Stop - first check you have plugs that match your cable. RJ45 plugs for >> solid do not work well on stranded and vice versa. > > How do you tell the difference? Dunno, the dse page doesn't say what they are for, but they are the same sort as worked previously...
Re: cable testing?
> Stop - first check you have plugs that match your cable. RJ45 plugs for > solid do not work well on stranded and vice versa. How do you tell the difference? -- Sincerely etc. Christopher Sawtell
Re: cable testing?
On Thu, Mar 4, 2010 at 2:30 PM, Craig Falconer wrote: > Nick Rout wrote, On 04/03/10 14:28: >> >> Having now cross-examined the cable layer (she who must be skinny >> enough to crawl under the house) I suspect the cable may have been >> damaged going around some brick work and needing a damn good tug at >> some points. She has "volunteered" to try again [1], luckily we have >> plenty of cable. I will report back in due course. > > > Stop - first check you have plugs that match your cable. RJ45 plugs for > solid do not work well on stranded and vice versa. As I say, same kit that worked before, but worth knowing. > > Secondly - if you fasten the new wire to the old wire and pull it through, > then there's no need to go under the house again. Yes but it is going to get caught on the same brickwork... > > > -- > Craig Falconer > >
Re: cable testing?
Nick Rout wrote, On 04/03/10 14:28: Having now cross-examined the cable layer (she who must be skinny enough to crawl under the house) I suspect the cable may have been damaged going around some brick work and needing a damn good tug at some points. She has "volunteered" to try again [1], luckily we have plenty of cable. I will report back in due course. Stop - first check you have plugs that match your cable. RJ45 plugs for solid do not work well on stranded and vice versa. Secondly - if you fasten the new wire to the old wire and pull it through, then there's no need to go under the house again. -- Craig Falconer
Re: cable testing?
On Thu, Mar 4, 2010 at 10:01 AM, Ryan McCoskrie wrote: > On Tuesday 02 March 2010 09:49:26 pm Nick Rout wrote: >> I have run a couple of cat5e cables and I am trying to terminate them, >> unsuccessfully at present. >> > > ... What is your terminating process like? I've done a little for my Dad and > it's dead easy (about half of a room at Lincoln High). Has anyone shown you > how to do it in person? Are you using good parts? > Thanks for all the replies. I am running single cored cat5e and terminating with RJ45 plugs supplied by DSE with a crimp tool also supplied by DSE, (similar to the T2923 in their current stock.) I have used the same cable, plugs and tool before and got good results. I have now sorted which cable is which via a simple short out a pair and test with ohmmeter at the other end. I know I should be terminating with a socket and then running a short cable to the equipment at each end, but I wanted a quick and dirty until I have time to do it right. It has worked that way before. I have now crimped about 6 plugs on each end of the cable and it simply does not work when plugged into the router at one end and a computer at the other. I bought a cheap pair of reading glasses at the warehouse so I could see what I was doing. Yes I am using the same pattern (T568B) on each end and I can almost recite the order of the colours in my sleep. (ow,o,gw,b,bw,g,bw,b), http://www.swhowto.com/CAT5_Ch1.htm Having now cross-examined the cable layer (she who must be skinny enough to crawl under the house) I suspect the cable may have been damaged going around some brick work and needing a damn good tug at some points. She has "volunteered" to try again [1], luckily we have plenty of cable. I will report back in due course. [1] partially, I suspect, because the cable across the living room floor has low aesthetic quality.
Re: OT: Telecom Proxy servers?
CABLE CABLE CABLE! Or if you live in an internet-ghetto^Wnon-cabled area then you're pretty stuck with telecom DSL, whether it be xtra or wholesaled through another ISP. Some areas (mostly city) allow telstraclear DSL, but thats PPPoE and only in places they have their own copper but not coax. I've heard excellent stuff about netspeed wireless, and they have provided a decent pipe in Hoon Hay, at a location where DSL was under 2 Mbit. http://www.netspeed.net.nz/ http://www.f1.co.nz/Christchurch franchise Paul Swafford wrote, On 04/03/10 12:14: Thanks Craig .. Well there is an opt out .. its called find another provider .. I guess the next question is who? Craig Falconer wrote: Paul Swafford wrote, On 04/03/10 11:50: I've started working more from home lately .. sadly I'm on Telecom DSL I've noticed a lot of caching going on .. particularly (but not only) when I update pages on a US server. I'm constantly fed old version of these pages rather than the new page I just uploaded. .. even demanding an uncached version fails to work. Has anyone else noticed this? I guess I first noticed it about 2 or 3 months ago. Yes - domestic DSL are now being transparently proxied since August last year. There's no opt-out. http://list.waikato.ac.nz/pipermail/nznog/2009-August/015729.html -- Craig Falconer
Re: OT: Telecom Proxy servers?
Thanks Craig .. Well there is an opt out .. its called find another provider .. I guess the next question is who? Craig Falconer wrote: Paul Swafford wrote, On 04/03/10 11:50: I've started working more from home lately .. sadly I'm on Telecom DSL I've noticed a lot of caching going on .. particularly (but not only) when I update pages on a US server. I'm constantly fed old version of these pages rather than the new page I just uploaded. .. even demanding an uncached version fails to work. Has anyone else noticed this? I guess I first noticed it about 2 or 3 months ago. Yes - domestic DSL are now being transparently proxied since August last year. There's no opt-out. http://list.waikato.ac.nz/pipermail/nznog/2009-August/015729.html
Re: OT: Telecom Proxy servers?
On Thu, 2010-03-04 at 11:50 +1300, Paul Swafford wrote: > I've started working more from home lately .. sadly I'm on Telecom DSL It's not that sad. I had to switch to Telecom since there aren't really any alternatives with decent International bandwidth. > I've noticed a lot of caching going on .. particularly (but not only) > when I update pages on a US server. > I'm constantly fed old version of these pages rather than the new page I > just uploaded. > .. even demanding an uncached version fails to work. > > Has anyone else noticed this? > I guess I first noticed it about 2 or 3 months ago. > > I have noticed some caching but nothing too nasty. I did find that refreshing in Chrome doesn't work but doing a force refresh in Firefox worked without a problem. hads -- http://nicegear.co.nz New Zealand's Open Source Hardware Supplier
Re: OT: Telecom Proxy servers?
Paul Swafford wrote, On 04/03/10 11:50: I've started working more from home lately .. sadly I'm on Telecom DSL I've noticed a lot of caching going on .. particularly (but not only) when I update pages on a US server. I'm constantly fed old version of these pages rather than the new page I just uploaded. .. even demanding an uncached version fails to work. Has anyone else noticed this? I guess I first noticed it about 2 or 3 months ago. Yes - domestic DSL are now being transparently proxied since August last year. There's no opt-out. http://list.waikato.ac.nz/pipermail/nznog/2009-August/015729.html -- Craig Falconer
OT: Telecom Proxy servers?
I've started working more from home lately .. sadly I'm on Telecom DSL I've noticed a lot of caching going on .. particularly (but not only) when I update pages on a US server. I'm constantly fed old version of these pages rather than the new page I just uploaded. .. even demanding an uncached version fails to work. Has anyone else noticed this? I guess I first noticed it about 2 or 3 months ago.
Re: cable testing?
On Tuesday 02 March 2010 09:49:26 pm Nick Rout wrote: > I have run a couple of cat5e cables and I am trying to terminate them, > unsuccessfully at present. > ... What is your terminating process like? I've done a little for my Dad and it's dead easy (about half of a room at Lincoln High). Has anyone shown you how to do it in person? Are you using good parts?
Re: cable testing?
> More expensive boxes are called scanners and cost thousands - they can do > things like testing all OSI layers (ie speak a full smtp session with a > remote host) as well as testing actual voltages, cable lengths, noise > factors, etc. There's a Dynatel subscriber loop analyser in my work van that can, among other things, test longitudinal balance, insulation resistance, cable length. If everything is within spec then you'll know the cable's OK. I guess you might want to test SNR at frequencies used by 100baseT and 1000baseT, but I don't think the Dynatel does that (not the model I have). Yuri
RE: cable testing?
Check that you are wiring both ends to the same standard - A or B not one of each - It does pays to check the obvious somes times(says he who spend 2 hours fault finding a blown fuse) Maurice > -Original Message- > From: Nick Rout [mailto:nick.r...@gmail.com] > Sent: Tuesday, 2 March 2010 9:49 p.m. > To: linux-users@it.canterbury.ac.nz > Subject: cable testing? > > > I have run a couple of cat5e cables and I am trying to terminate them, > unsuccessfully at present. > > Will a cable tester help me? I suspect that each time I put a plug on > the end one or more of the wires is in the wrong place, or not quite > long enough to make the connection. Coupled with this I am only 90% > sure which cable end is which at the switch end (ie the centre of the > star), having failed to mark them. > > Is there some sort of cable tester that can, eg, tell me what wires > are right and what are wrong, and which end of the cable is wired > wrong? > > And, heres the hit, can someone in ChCh lend me one? > > Desperate and frustrated in Linwood. > > N
