Network Interference from Phoneline?

[phantom]

I have a 20 meter cat 5e cable going 5.2 meters up one wall between the bricks and frame, 10 meters accross the ceiling in free air and 3 meters down another wall to an upstairs area.

If I run a 60 meter (45 meters still in a coil) cable up the stairs all is ok but my 20 meter connection in the walls and accross the ceiling is not working at full speed and invariably stalls or freezes. A message appears that the website is found but the system freezes before my homepage has a chance to download whilst with the internal cable the homepage appears within a blink.

The 5.2 meter length of cable runs parallel with the phone line and I suspect this may be ineterfering.

Is this a possibility and would sheilded UTP fix it?

I ran 2 cables through the walls as it's just as easy as installing one and gives me options for the future but both parrallel lines have the same problem.

Any hints or tips before I embark on a wastefull rewiring?

[holomatrix]

shouldn't be... intereference is more likely from an electromagnetic source (such as close unshielded proximity to the white power cable that runs through the cavity walls) or a break in the cable. Length should be fine. Cable should be rated to about 150 metres.. (I saw one cable at a site owned by AgVic that ran 230metres from one building to another... still worked fine)

[3cakes]

the telephone line would not be interfering with your data connection, as holomatrix said, it is far more likely that it will be EMI-related (a power source etc). A 48-volt phone line would not generate the emi to cause this sort of problem.

a data cable can intersect a power cable if it crosses perpendicular but you can't run it parallel to a power cable.

in this case switching to STP (shielded TP) might solve the problem but there's no guarantee.

have you checked the cable integrity (not really concerned with whether it's an honest cable but check the end points and check the filaments in the ethernet ports into which the cable connects).

UTP cables can be tied together into massive bundles (look at any corporate structured cabling cabinet) so a single phone line is very unlikely to cause interference.

can you try a different cable path?

[ForumTest]

Sounds like the 20m cat5 is maybe wired wrong.
If a pair is incorrectly wired you may get dc connectivity but end up cross paired. Yes commercial cables have been known to have this problem.
Check the colors.

[Silverman]

Spoke to my friend about your problem, he reckons that it is most likely due to 'el cheapo' connectors. Get yourself some quality sockets (chrome) and the problem will go away. Try it, it's better than ripping out and replacing what you already have.

[phantom]

Thanks to all for the tips. After reading that it most likely wasn't the phone line, and knowing that there were no power supply lines running parallel (a couple were perpendicular) with my cat5 cable I homed in on my AMP isulation displacement wall sockets. Having chopped these off and crimping on RJ45 plugs, problem was solved. Now to find some reliable RJ45 wall sockets to get rid of the unsightly cable coming directly out of the wall socket facia.

Thanks again for the tips - they saved alot of trial and error.

PS - the NB1300+4 is a real neat peace of kit! Everything you need for a few PC's to share the internet and form the backbone of a small home network.

[phantom]

All is now 100% fixed. For anyone contemplating using AMP's CAT 5E RJ45 JACK 406372-1, don't use more than 1 a line! The resistance of 1 jack is OK but as soon as there are 2 the system falls over.

I need 2 wall jacks because my router is in the office and therefore the wiring in the walls must come out in my office and in the kids room upstairs.

After about 3 reassemblies using all the right tools, I gave up on the insulation displacement technology, disassembled the jacks removing the plastic housing around the terminals and directly soldered the wires to the insulation displacement terminals. I did this on both ends of the cable and all is now 100% reliable and quick.

Thanks again for the tips.

:) :) :cool: :cool: ;) ;)

[Silverman]

Thanks again for the tips.

Glad everything worked out OK for you, my friend was quite adamant that this would be your problem. Apparantly it is something he is faced with on a regular basis, hence the reference to 'el cheapo' connectors.

Thanks for letting us know the successful end to the saga.

Silver.

[MadMick]

Originally posted by phantom
All is now 100% fixed. For anyone contemplating using AMP's CAT 5E RJ45 JACK 406372-1, don't use more than 1 a line! The resistance of 1 jack is OK but as soon as there are 2 the system falls over.

I need 2 wall jacks because my router is in the office and therefore the wiring in the walls must come out in my office and in the kids room upstairs.

After about 3 reassemblies using all the right tools, I gave up on the insulation displacement technology, disassembled the jacks removing the plastic housing around the terminals and directly soldered the wires to the insulation displacement terminals. I did this on both ends of the cable and all is now 100% reliable and quick.

Thanks again for the tips.

:) :) :cool: :cool: ;) ;)

Glad to hear your problem is sorted, in future, use either Krone or the Clipsal jacks, I have installed thousands of those with very few failures.