All ethernet interfaces are isolated from any voltage on the copper up to a couple thousand volts, either by a transformer or (ISTR) pairs of LED diodes and sensors, but the latter may have been in the 10Mb era. I can't see a cheap 100Mb optical sensor.
A long time ago I remember seeing sheilded cat 5. There is one big problem with sheilded. You can only ground 1 end not both. I've also seen cable that is sheilded and looks like cat 5. The problem with this stuff is the impedance of the cable is out of spec and will cause all sorts of problems.
If it runs from each jack to a central terminal you can replace the terminal with a switch. If it's daisy-chained you can't.
Quoting what your replying to is nice. It gives context to your question.
How's the latency? My cable often has less than 100mS.
I found having 3&6 together (same pair) essential for 100Mbps ethernet.
You might if you made a long cable, connecting one end to the ethernet card and the other to the high-voltage lines along the street (maybe thinking you could get free internet that way*).
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It is probably 3 pair screened CAT5, this is pretty common in newer residentlial installations (for telephone).
The last place you want to save a few bucks by buying mickey mouse stuff is on a network.
How do you define "Mickey Mouse" stuff? By price? Just because a vendor decides to sell at reasonable prices rather than take the full markup on the stuff doesn't mean it's any worse. By all means know what you're buying but don't equate price only to quality.
From:George snipped-for-privacy@nospam.invalid
Well it wasn't actually labeled 'cat5cableguy' on the product you know...
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