cat 6 network cable broken

[tony_park]

Hi

Anyone know much about network cables?

We've just moved our media pc into our dining room as our lounge is being damp proofed. We have a cat6 network installed throughout our house, however on one of the ports, pins 7 & 8 don't seem to work/broken cable, and the other port pin 3.

Does anyone know which are the required pins, in hoping not all.

I've just been up in our loft to check the connections at the patch panel, and they're the same as at the network socket on the room

Sent from my Lumia 800 using Board Express

[tony_park]

Ie both look fine.

Next task is to put a connector on each end of the cable, just to make sure its not the patch panel or socket.
Anyone any other thoughts?

Thx
Tony

Sent from my Lumia 800 using Board Express

[STC]

Gigabit Ethernet uses all four pairs. 100MBit use two pairs.

Termination can be done to one of two standards, where green and orange reverse.

Can you define a bit better as to the problem? Is the broken area a RJ45 socket or is it just a cable with an RJ45 end on? How do you know pins 7 and 8 are suss?

[tony_park]

Hi,

thanks for the update - we're getting 100mb signal recognised on the network adaptor. I'm having to use a usb network adaptor, as the onboard network doesn't seem to want to connect. The usb adaptor takes a long time to recognise the network, and get an ip address - much longer than other ports.

I have a network tester - where we have a little unit with a battery, that connects one end, and sends a small elec current down, and a termination unit that flashes the relevant cable being tested. Like this one. For the port we're using, lights 7 and 8 don't light on the receiver.

Thanks
Tony

[STC]

Okay, so these are terminated to sockets in the wall? If so unscrew the wall plates and carefully inspect the termination. Hopefully the breaks/poor connections are at the termination points either end of the cable and not somewhere along the run.

[barnabas1969]

Or... if you're OK with connecting at 100Mbps (instead of gigabit), then set your network adapter to connect at 100Mbps, full-duplex. The reason your network adapters are having trouble connecting is because they see a non-standard circuit and can't decide what to do. If you set it at a fixed 100Mbps (instead of auto-negotiate), it will work fine at 100Mbps.

EDIT: I see that you said that pin 3 is broken. If that's the case, then neither 100Mbps nor gigabit should work.

[STC]

^^ Only if it's a good 100Mbit link and the cable is not damaged somewhere, not just one where autoneg has given up and is spoofing a working 100Mbit link.

[tony_park]

Hi guys

in our dining room, we have 2 network feeds - one has a problem with pins 7 & 8, and the other with pin 3. The port with pin 3 problems won't connect at all. The other one takes about 50 seconds to get an address and connection.

Thanks
Tony

[barnabas1969]

Hi guys

in our dining room, we have 2 network feeds - one has a problem with pins 7 & 8, and the other with pin 3. The port with pin 3 problems won't connect at all. The other one takes about 50 seconds to get an address and connection.

Thanks
Tony

You must fix the pin 3 problem. As suggested earlier, take a look at the connections to make sure they are punched down correctly. You may need to cut the ends off the cables and punch them down again.

If you can fix the problem with pins 7 & 8, that would be great. If not (or if you don't care to try), you can change the NIC to connect only at 100Mbps, and it will connect faster.

[tony_park]

Hi guys,

problem solved - chopped the ends off both ends of the cables, and re-inserted them, now we have gigabit back on both lines.


Thanks
Tony

[STC]

Nice!
I can only surmise that 're-inserted' means re-terminated

Glad to hear it anyway.