NETWORK EXPERTS... networking problem?

Question

I have a DL 524 router, 40 Meter UTP 10/100 lan card and PC running on winxp pro sp2. I have checked the router with another PC and its working. Checked the RJ 45 connector of the 40 Meters UTP with a tester and all 8 small crimped wires are OK. The PC is also working. THE PROBEM IS....the PC cannot connect using the 40 meters UTP cable but can connect with a 10 meter UTP cable. There is also a pulsating icon every second....it pulsates like this. 3/4 seconds a network cable is unplugged then ...1/4 of a second...aquiring IP...does it mean that the signal of the router from the other end of the house is weak....or there maybe just something wrong with the crimping or devices. what are the limits of a wired connection as with its lenght. Hope you can help me. thanks

Answer 1

Ethernet has a length spec of like 300 feet at which point you'd need a repeater to keep it going.

It sounds like you have a bad cable. Bad cables are the most common problem.

I would recommend that you not use DHCP but simply assign the machines static IP addresses, and then use a ping test to determine connectivity. Ping should drop no packets and have a high speed (low latency) in ms.

Using static IP addresses with a known working network configuration means that you can avoid issues related to ip acquisition and focus on connectivity.

Is this a homemade cable? Or commercially purchased one?

Answer 2

What kind of tester did you use? If it's a simple pair test/cable mapper, then it didn't do a full test of the cable. All those can check is pin-to-pin connectivity. They can't check for things like split pairs, etc.

Hold one of your RJ45 connectors with the tab away from you, with the cable coming out the bottom. From left to right you should have-

White/Orange
Orange
White/Green
Blue
White/Blue
Green
White/Brown
Brown

The orange and green pairs are the two you need to be most concerned with... In this situation, Ethernet will use pins 1,2,3 and 6. Pins 1 and 2 are one pair, pins 3 and 6 are the other. If this is not maintained, when you start getting into the longer cables, like you are, you'll see symptoms like this.

Answer 3

Well Long cables are subject to interference from other things. Like an AC line or fluorescent light. Check the cable to see how it runs, If it parallels an AC line move it! If you have to run near other wiring use shielded cable. Long runs can indeed drop signal.

You might also have a weak ethernet card at one end or the other, not common but possible. The fact that it drops.connects.drops makes me think of AC line interference!

Answer 4

the long cable gives intermittant network cable unplugged.

It works on the other comp?????

Get a new cable or replace the ends if you have the tools,
Get a new cable- You are pretty long -so do you need one that long? I would go wireless before trying to route one that far, just cause it is easier and lasts longer.

Homemeade 40 metres is just not good enough to be reliable.

AAS Comp Networking

Answer 5

The LAN you're on could be set as a public community with community discovery disabled. you are able to enable this with the aid of community and Sharing Centre. yet another excuse this might happen is probably you're utilising a twisted community cable to connect with the router. you will possibly be able to desire to apply a on the instant community cable to connect with routers/community hubs.