Hi Mike,
You wrote to me:
MB>MB> CA> And while you are at it is there any CAT 1, 2, 3, 4 or 5 for
MB>MB> CA> Shielded Twisted Pair (STP) cable?
MB>MB>No, STP cable is usually specified by reference to IBM SNA.
MB>MB>Let's step back a moment: what exactly are you trying to find out?
MB> GW> Belden list a number of STP cables related to categories in
MB> GW> their master catalogue (the one I've got is copyright 1993):
MB>* * *
MB> GW> Both Farnell and RS (the two major broad line Electronic
MB> GW> distributors in the UK) list screened Category 5 cable from
MB> GW> other vendors.
MB>I assume "screened" is British for "shielded?"
It's the English equivalent of the American "Shielded".
btw, there is no such language as "British", there are two legally
useable languages in Great Britain (which is England, Scotland and
Wales): "English" in all af Great Britain and "Welsh" in Wales. Gaelic
is also making a comeback in Scotland but it currently has no legal
standing I'm aware of.
MB>As far as I know, "Category 5" cable is required to be unshielded.  "Type 
5"
MB>cable certainly can be shielded, although I don't remember the Type codes 
of
MB>the top of my head.  "Level 5" cable can probably be shielded or 
unshielded.
The catalogues I referenced all specifically listed it as screened
or shielded (depending on entry ) cable meeting Category 4 or 5
specifications. They have an overall aluminised polyester screen (or
shield ).
They also list IBM data Cables Type 1, 6 and 9 (all double screened
twisted pairs) and IBM Media Cable Type 3 (UTP)
MB>There has been a concerted attempt in the U.S. to get rid of the vendor
MB>specific cable terminology, especially "Type," in favor of the vendor
MB>independent specifiers.  However, some cable which is used in specialized
MB>environments, such as IBM Twinax, doesn't have any corresponding vendor
MB>independent designation.
The catalogues I refer to generally list twisted pair data cables as
either meeting "Category x" (some Category 4, but mainly Category 5) or
specify particular manufacturers specs (usually the IBM "Types").
We don't see the telephone standard "Category" cables over here
as the telephone cabling is to BT specifications.
BT is British Telecom, the privatised telephone company who used to be
the state owned monopoly company.
George
 * SLMR 2.1a * My software doesn't have bugs it develops random features
--- Maximus/2 3.01
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