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[GroovyG]

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Where's the output from the spur, or is it bunched in with the T&E's

Indeed, it's in with the T&Es. As suggested above, "fancy junction box". Cautionary tale: always do the safe isolation thing and test everything.

 

[DPG]

Where's the output from the spur, or is it bunched in with the T&E's

I think they've wired it in with the feeds, hence nicebutdim's comment.

 

[Simon47]

One worked to the A standard and the other the B standard.

More fun than that - mixing A and B would swap pairs butvstill leave 4 pairs connected. In this case, only 2 pairs were connected between any patch panel socket and wall socket.
Thise who've worked with network cabling for a while will know that the panels have different terminal layouts. This may or may not work ...
Some have the terminals like this :
45 12 36 78
Bl Or Gr Br
01
02
Bl Or Gr Br
45 12 36 78
i.e. all the terminals for port 1 are in a line on the top, with those for port 2 in a line at the bottom.
Some have tbe terminals like :
45 12 45 12
Bl Or Bl Or
1 2
Gr Br Gr Br
36 78 36 78

Needless to say, the clueless idiot didn't bother looking at the markings and used the wrong layout. So socket 1 had 2 pairs from port 1 and 2 pairs from port 2. Then socket 2 had the other 2 pairs from ports 1&2 ! And so it went, with the added bonus that none of the cables were numbered and he'd mixed a few of those up as well.
Basically had to pull all the cables off the panel, work out which was which (give the tone set an outing), and reterminate them.

On another occasion, the tenant took their cabinet and were supposed to leave the cabling. Something got lost in translation, as their lecky just chopped the bundle of cables - fortunately, leaving just enough length to re-use them (again, tone set job to work out which was which).

 

[Other_Tucker]

One worked to the A standard and the other the B standard.

American and British, it doesn't stand for those specifically but it's a good rule of thumb. Everyone use B for British across the board in the UK so there's never any major ---- ups.

 

[brianmoooore]

American and British, it doesn't stand for those specifically but it's a good rule of thumb. Everyone use B for British across the board.

I'll remember that - didn't realise it was that simple.
Bought my first RJ45 crimper back in the summer to make up half a dozen cables. All worked first time, except one 40m cable, so I invested in a cheap cable tester recommended in a thread on here. Soon found the problem using that. Master was sequencing 1,2,3...8, while the slave was sequencing 8,7,6...1 - I'd crimped one of the plugs on upside down. Could make out which is was through the translucent plastic of the plug, so five minutes later and one scrap plug, all was good.

 

[mainline]

I'll remember that - didn't realise it was that simple.
Bought my first RJ45 crimper back in the summer to make up half a dozen cables. All worked first time, except one 40m cable, so I invested in a cheap cable tester recommended in a thread on here. Soon found the problem using that. Master was sequencing 1,2,3...8, while the slave was sequencing 8,7,6...1 - I'd crimped one of the plugs on upside down. Could make out which is was through the translucent plastic of the plug, so five minutes later and one scrap plug, all was good.

I find this to be a decent tester for the price.

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Also using through hole wiring plugs makes life easier

 

[brianmoooore]

Also using through hole wiring plugs makes life easier

Is that where you trim the cores to length after the plug is fitted?

 

[DPG]

Is that where you trim the cores to length after the plug is fitted?

Yes. Much easier.

 

[Simon47]

... I'd crimped one of the plugs on upside down. Could make out which is was through the translucent plastic of the plug, so five minutes later and one scrap plug, all was good.

You've reminded me of an "incident" from a good few years ago. My employer at the time managed a campus WAN for a science park - each office/unit was pre-wired with a couple of network points, and one was cabled back to a switch port. We could remotely provision internet access just by configuring the port and allocating them an IP address or range.
Unfortunately, wherever you put these sockets, it's going to be in the wrong place for someone - and sure enough, a business moved in but needed the internet connection to their server room the other side of the unit. So one 40m cable and a few lifted floor tiles later, internet provided where it was needed. Only it "didn't work".
We ended up on a 4 way call - me, the people who at the time managed the network for us, the customer's IT guy, and their external IT support. It turned out, the guy "knew" he needed a crossover cable so cut the plug off and fitted a new one wired as a crossover. - neither our switch, nor his firewall had auto MDI (most devices will automatically switch modes as needed these days so crossover cables are rarely needed, this was some time ago).
The customer's IT guy talked him through finding another crossover cable and an inline coupler. The customer said he'd found one and "it's yellow, is that OK ?" His IT guy responded as I'd have loved to ... "I don't f***in care what colour it is as long as it's crossover".
Needless to say, with the extra crossover in line, our "it's not working" service sprang into life. I managed to refrain from "I told you so" (or something to that effect).

 

[Mikegh]

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