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Cat 5 Cable problems...

By darren ·
Am new here so apologies if this is the wrong place to ask this question.

We have three floors at our main premises, the top floor contains around 30 PCs on their own network (local range of 10.0.0.x) Vigor Draytek 2600 ADSL router acting as the DHCP server. Connecting to two 8 port hubs and 1 16 port switch.

The middle floor has about 7 PCs using the range 192.168.1.x again Draytek Vigor 2600 acting as an ADSL router/DHCP server connected to a 16 port Switch

Lowest floor just one PC, which currently has a cable going out of the window to the middle floor's switch.

I have one cable running from the middle floor to the ground floor and one to the upper floor. Both cables were recently tested and were OK.

My problem is that when I try to connect the two cables up they refuse to work. I've tried connecting them to a hub on the lower floor and also directly into the PC, and on the upper floor I tried to the switch and also to a PC.

XP Home detects the cable as being connected and kindly tells me it has connected at 100mbps. The problem is that the ethernet port on the back of the PC flickers like mad, and there is no connection to the network. I've recently tried using new connection plugs on the one cable, but it made no difference. The cable going out of the window works perfectly and when connected it gives a steady green light, and a perfect connection.

I'm at my wits end, had the cable test shown defective cables I'd have been happy, now I have no idea how to rememdy the situation and I can't replace both cables myself sue to the distance and walls/ceilings etc.. being in the way.

If anyone can offer any help I'd be most appreciative!

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by maddiuex In reply to Cat 5 Cable problems...

Okay, Try this, You have to use cross over from one to the other, So from the top story plug your cable into the Cross link, or Uplink port. This cable would then go into a regular port on the second floor. Then the cable from the secon floor to the third floor would go into a regular port to the cross over or uplink port in the third floor.

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by jbanksnwmls In reply to Cat 5 Cable problems...

Something else to try as a test is changing the nic from auto to 10Mbps/Half duplex. If the cable going to the other floors have rj45 Plugs on them instead of RJ45 Cat-5 Data Jack the cables don't meet Cat-5 requierment.

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