Home network issues

I work for an electrical firm and have been roped in to install and connect the structured cabling throughout a very large house.

All the cables (69 of them) have been tested using a cable tester which comes up like this:

1-1-1
2-2-2
3-3-3
4-4-4
5-5-5
6-6-6
7-7-7
8-8-8

Obviously this is all good, as it shows a 0 when the connection is not terminated properly, or the numbers are crossed over when they are terminated wrong.

My problem is that when trying to connect to the internet via the ethernet ports, most of them are not working.

I've tried connected the port directly to the router instead of the switch, does not work

I've tried all the ports on the switch and these are fine.

I don't get why some are working but most are not.

HELP!

How good is the cable tester? Is it a decent model? If it is a cheap model it may be it isn't recognising issues with the cables. The fact some work and some don't suggests there is something wrong with the termination.

Are you terminating at sockets? If so are they screw terminals or punch down IDCs? I had problems with some sockets I had bought as no matter how well they were punched down they didn't work - swapping out the socket fixed the issue.

One presumes a PC directly into the router with a patch cable works?

The cable tester is decent, it's my CCTV tester with this function built in. I use it for when testing IP cameras and it hasn't failed me yet. Cost me £100.

I've checked some of the punch down terminations and they all look good, so I can't rule out faulty sockets. But just seems unlikely given the amount.

Yes plugged directly into the router or switch works like a dream.

No auto-crossover (at both ends)? Unlikely these days, I know, but still possible.

No auto-crossover.

Worth getting a few of these to see if that's the problem on the links that don't work?

As a first port of call i would try setting your test laptop to manual 10mbit (assuming it is trying to negotiate at 1gbit) Then step it to 100mbit and re-test.

Perhaps the cables are too long and its failing to negotiate?

I have to assume the same kit is being used to test all the cables - hopefully plugging in to a switch at one end and a laptop at the other. If we can rule out differences in kit then it is only the cable and sockets being tested.

For testing I would use the same switch port, the same patch cables, the same network drop lead and the same laptop. That leaves the only difference being the actual structured cabling.