[PLUG] RJ45 to Coax adapter?

[AthlonRob]

On Thu, 2004-05-06 at 21:58, Paul Johnson wrote:

> > Cat 5 has to do with the number of twists per foot.
> 
> Not exclusively.  Number of wires also factors in.  Category 3 cable
> is 4-strand wire, and commonly uses RJ-11 connectors (aka a phone
> cord).  As opposed to Catagory 5's 8-strand cord, commonly used with
> RJ-45 connectors (aka an Ethernet cable)

Actually, yes, exclusively.

Cat-3 may normally only be two pair that you've seen, but I have at
least two or three cat-3 patch cables floating around for use with old
10BaseT NICs.  I can assure you, they have an RJ-45 connector at each
end with four pairs of wires.

Cat-5 that *you* have seen may have all been 4-pair... but if you look
for it, you can find even 50 or 100 pair cat-5 cable out there.  Beyond
100 pair, it becomes difficult to maintain the quality, as I understand
it, so most cable over 100 pair is only rated at cat-3.

The category of cable is based upon the number of twists per foot.  The
number of twists is what allows it to function at the various levels...
16Mbps for cat 3, 100Mbps for cat 5.  

Saying cat-5 is always 4-pair and cat-3 is always 2-pair is like saying
all vehicles on the road have four wheels...

Rob