30 meters cat5 already link problems 1

[coldascold]

I am running cat6 cable over 30 meters with no problem however I ran some Cat5 (no diff really just thiner wire)over the same distance and could not even get a link!
Is there anything I should know about doing this?

 

[coldascold]

All I can come up with is flashing lights on the hub/switch when the cable is linked to the netcard(probly dose this whenever the connection is unavailable)
Cat5e cable has been tested with multimeter over and over with full success.
The Cat6 works perfect at arround 3gig transfer per 8 mins over 30 meters
???????????

 

[daronwilson]

The wire gauge is slightly larger for Cat6 (23 gauge) but that was done to provide the needed headroom for the overall performance. You should have no problem going 30 meters, however, here is what I have seen that makes the cables NOT work:

1. Most common error - improper termination, mainly a split pair. Sorry to harp on this one, but it is the most common problem I've seen. Pins 1 and 2 MUST be use a twisted pair, and pins 3 and 6 MUST use a pair. If you don't have it wired this way, this is quite likely your problem.

2. Too much untwist when terminating. If you are putting jacks on the end, be sure the minimum untwist of 1/2" is observed. If you are putting modular plugs on the end, it is even harder. In the early networking days, 10 mbs was pretty forgiving. However, to make it fly at 100 mbs or higher you really have to play by the rules. Be sure you maintain the twist as close to the termination point as possible.

3. Bad hardware - be sure the modular plugs you are using are designed for the type of wire (if you are terminating on plugs). There are plugs for solid wire, plugs for stranded wire, plugs for flat wire, plugs for round wire, and plugs that do solid AND stranded, etc. The wrong plug can give you DC continuity but still not provide solid connectivity.

4. Wire - I've seen stranded wire used in the field for cabling with poor success. Keep in mind that stranded wire has much greater attenuation per foot, the wire is used only for patch cables, which are limited by standards to relatively short lengths (I think the longest allowed is around 70 feet, but I'd have to look that up).

SO, if you are terminating with the correct pairs, using solid wire, using the correct good quality jacks or plugs and keeping the twist to a minimum, AND still it doesnt work, I suspect you have a NIC or hub problem.

Hope this helps, please keep us up to date with what you find for a solution, I'm always curious what finally worked for people.

Good Luck It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com

 

[coldascold]

Quote daronwilson
(1.Most common error - improper termination, mainly a split pair. Sorry to harp on this one, but it is the most common problem I've seen. Pins 1 and 2 MUST be use a twisted pair, and pins 3 and 6 MUST use a pair)

-Dose this mean that the cable is Color Senstive in a sense as in 1 twisted pair would be twisted against each other in the cable(green twisted around green)(brown twisted around brown ect.)Am I looking too Hard?

Quote 2.(Too much untwist when terminating.If you are putting jacks on the end, be sure the minimum untwist of 1/2" is observed-----Be sure you maintain the twist as close to the termination point as possible.)
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As the link is to a hub I have the wires Identical on each RJ plug ie.Symetical in apperence regardless of anything else

 

[coldascold]

I have read daronwilson's post thread575-352680 it has answered my conclusion which tends to conclude right

Thanks for your input and knowledge on this.

Any further comments are respected

 

[coldascold]

An update with my findings for this solution;

Solution = Quote daronwilson 1.-------.-------.Pins 1 and 2 MUST be use a twisted pair, and pins 3 and 6 MUST use a pair-------.
Synopsis = Quote If you don't have it wired this way, this is quite likely your problem.

Practical = 30 meters Cat5e coiled in shape,connection 100mbs to 10/100mbs Swtich