network disconnected

Ive got a cat5 cross over cable about 40ft long but when connected it says it isn't but i am certain the cable is ok. Could it be the cable is to long or is it likley to be something else, pinging don't work. when i put a short cable on it works ok and it used to work but never at full speed (100meg)

[Beta Spanky]

Can you be a little more specific about what and how you are using the cross-over cable?

Such as what it is connected to at both ends and such.

Beta Spanky, this is my brother

He has a Win2k machine upstairs, and he has run a self made cat5 cross-over cable about 40ft to RJ45 socket outlet.

But he cannot get a connection with his down stairs PC. (He has before though).

He has tested the cable with a multi-meter and checked he has wired up the RJ45s up correctly for a cross-over cable.

A multi-meter does not lie you know

I took a guess that the signal degrades before it can the reach the other end of the cable.

Maybe a network hub would boost the signal.

Dunno...

I configured windows networking my-self, but I can't even ping the PC upstairs.

Yet when we take the machine upstairs and use a shorter cross-over cable it works
.

Go figure ah!

[ August 11, 2001 04:10 PM: Last edited by dazlink ]

[Beta Spanky]

What you need to check is Ohms.

Tell me what you get on the meter when you check this. If they are high, then you are probably degrading the signal to nothing by the time it gets to the other end. I am using well over 25 feet of cat5 cable and have no problems. Of course I am using a 5 port linksys hub and not using a crossover cable. I can't say for sure, but maybe my hub is boosting the signal.

I'm geting less than 0.1 of an ohm on all of the wires, (linking the wires there and back)
one card is a genius gxr 2 the other is a
netvin 501 notebook card

[BearCat]

category 5: transmission characteristics are specified up to 100 MHz;
data rates up to 100Mbps; four twists per inch;better performance; more expensive;
max recommended distance: 90m

This will give a reccomended max of 295.29 feet ( 90*3.281 ).

Then the lenght is NOT the problem...

[ August 12, 2001 07:34 PM: Last edited by Saskias BearCat ]

Yo Bro, I see that you are hanging about.

I have you got that?

Look's like the damn cable is to long!!!

Back to the drawing board... DOH

[adams]

I've got 50ft. of cat5 crossover cable hooking my two comps without a hub, just two cards in host and on card in the guest.

The whole thing is doing my head in now.

I hate it when something simple turns into a complete bloody nightmare.

Nevermind, we have plenty more CAT5 cable to play around with.

We may re-lay another run of cable this next weekend.

Thanks everyone for the feedback though.

As long as the cable being used is actually rated as Cat5, your maximum cable length would be approx. 330 feet. If you are positive the cable is wired properly for crossover, my only thoughts are either it's not a CAT5 cable, or there is a break in the cable somewhere.