15 Oct
2001
15 Oct
'01
9:07 a.m.
On Oct 15, 11:18, Ethan Dicks wrote:
Cat3
Just not at the same time as you're running 100baseTX up the same cable :-)
--
Pete Peter Turnbull
Network Manager
University of York
--- "Eric J. Korpela"
<korpela(a)ssl.berkeley.edu> wrote:
Just wired the
house with Cat-5 this week. 10bT has the advantage that
it's also 100bT with a change of equipment.
I know you probably know what you meant, but to me, that statement is
misleading, or rather, to someone who knows little about networking,
taking the second sentence out of context could lead trouble.
phone wire - 2 pair or more, good for analog telephones
CAT-3 - will pass 10mbps traffic (or analog telephone traffic)
CAT-4 - good for token ring
CAT-5 - good for most inexpensive networking technologies
CAT-5e - needed for transmission technologies that put > 100mbps on
a single pair.
10BaseT can use CAT-3 or better. 16mbps Token Ring needs CAT-5 or
better. 100Base-TX needs CAT-5 (including CAT-5 jacks!) Don't recall
what 100Base-T4 needs Lotsa little fiddly details about the physical layer
are covered up by
robust layer 2 and layer 3 protocols. Without expensive sniffer hardware
(Time Domain Reflectometer, anyone?), a lot of this stuff gets swept
under
the rug until you are having fits when it doesn't
work.
I couldn't agree more. Don't try to build a whole network (or long runs)
with stranded patch cord, for example.
(ISTR that you
can use the
unused pair in the cable for LocalTalk, but I haven't yet tried it).
Should be able to.