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-   -   Any cabling experts about? (https://www.cableforum.uk/board/showthread.php?t=33645440)

brundles 07-02-2009 20:18

Any cabling experts about?
 
I'm pretty sure I've missed the blinding obvious so this should give someone a good laugh at my expense but it's driving me round the bend...

Spent the day shifting the router, switch and a bunch of other stuff and placing cat 5e cabling around that's connected to the switch and wall plates (again, cat5e standard).

I'm happy with the cable terminations as the other cables done are all working fine (between router/switch and VM modem and router), but I'm pretty sure I'm missing something on the wall plates as it's not working.

The switch (GS608) picks up the cable connection and detects power over the link, but nothing happens beyond that. PC can't get an IP address and the router swears blind there's nothing there. I've also hooked the same cable direct to the router - same thing - the router can physically see it but nothing happens beyond that.

The cables have been terminated to T568A and the jacks on the wall plate have been connected up according to the T568A markings too.

Can anyone spot the (presumably blinding obvious!) mistake?

CHiLL 07-02-2009 23:58

Re: Any cabling experts about?
 
Could the cables inside the cat5 cable be snapped?

brundles 08-02-2009 01:02

Re: Any cabling experts about?
 
Thanks for the response CHILL

It's possible I guess, but I'm getting consistent behaviour across 4 connections so far so I'm not too keen on the idea. If it was one or even two I could see it.

I've been pretty careful throughout to make sure there's been no excessive bends on the cable while placing it so if that is the case I'll be a little bit cheesed off!

I'm going to try a couple of things tomorrow but replacing the cabling is another option to rule it out.

Dai 08-02-2009 07:44

Re: Any cabling experts about?
 
Do you have a tester?
Something like this can make snagging a lot easier.

brundles 08-02-2009 09:57

Re: Any cabling experts about?
 
Not just yet, but will do in about half an hour...

LSainsbury 08-02-2009 10:39

Re: Any cabling experts about?
 
Did you say you have faceplates on the wall? You said above that you:
Quote:

The cables have been terminated to T568A and the jacks on the wall plate have been connected up according to the T568A markings too.
So are they terminated on RJ45's on on a faceplate???

brundles 08-02-2009 11:42

Re: Any cabling experts about?
 
Quote:

Originally Posted by LSainsbury (Post 34729686)
Did you say you have faceplates on the wall? You said above that you:


So are they terminated on RJ45's on on a faceplate???

Not sure I understand what you're saying (bit slow sometimes!)

One end of the cable has an RJ45 connector to go into the netgear switch and the other is connected to the RJ45 jack in the faceplate. Is that what you meant?

I'm working through the connections with a tester not and seem to be making progress (slowly!).

Dai 08-02-2009 11:54

Re: Any cabling experts about?
 
Quote:

Originally Posted by brundles (Post 34729719)
Not sure I understand what you're saying (bit slow sometimes!)

One end of the cable has an RJ45 connector to go into the netgear switch and the other is connected to the RJ45 jack in the faceplate. Is that what you meant?

If I understand correctly, the workstation end terminates in a faceplate with socket. Presumably at the back of the plate you make the connection into push-down contacts?

That's a likely area to find a problem. If it's solid cable it's prone to break if moved too much or it may not be a good contact in one of the clippy things..

brundles 08-02-2009 11:57

Re: Any cabling experts about?
 
Quote:

Originally Posted by DaiNasty (Post 34729732)
If I understand correctly, the workstation end terminates in a faceplate with socket. Presumably at the back of the plate you make the connection into push-down contacts?

That's a likely area to find a problem. If it's solid cable it's prone to break if moved too much or it may not be a good contact in one of the clippy things..

Just looking at that now.

Those testers are worth their weight in gold. Must have spent too long on the thing yesterday and swappig too many cables around - what I thought was endemic in the whole job is looking suspiciously like 1 dodgy cable. A much happier thought than having to redo the whole lot.

MovedGoalPosts 08-02-2009 12:00

Re: Any cabling experts about?
 
When I've done this type of cabling, to either a patch panel at one end or face panel RJ45 socket at the other end, I've found the cable tester, like that linked to above, invaluable. Inevitably I find I've not punched down one cable end properly, or crossed one over.

brundles 08-02-2009 12:58

Re: Any cabling experts about?
 
Quote:

Originally Posted by DaiNasty (Post 34729732)
If I understand correctly, the workstation end terminates in a faceplate with socket. Presumably at the back of the plate you make the connection into push-down contacts?

That's a likely area to find a problem. If it's solid cable it's prone to break if moved too much or it may not be a good contact in one of the clippy things..

Todays prize for remote diagnostics goes to DaiNasty - seems the "clippy things" for 3/6 in the problem jack aren't that great.

All sorted now though - thanks to everyone for the help.

LSainsbury 08-02-2009 15:26

Re: Any cabling experts about?
 
Glad you got it fixed...

When you say the clippy things - you mean these?

http://www.screwfix.com/sfd/i/cat/74/p1830774_x.jpg

brundles 08-02-2009 15:41

Re: Any cabling experts about?
 
Those'd be the ones - curtesy of Screw Fix.

Dai 08-02-2009 16:58

Re: Any cabling experts about?
 
I really need to focus on my terminology...

:dunce:

LSainsbury 08-02-2009 17:30

Re: Any cabling experts about?
 
Quote:

Originally Posted by DaiNasty (Post 34729901)
I really need to focus on my terminology...

:dunce:

I think we knew what you meant!

I normaly use a punch-down tool for those - it makes sure the wire is in contact with the metal contact.


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