9 Feb
2002
9 Feb
'02
7:11 a.m.
On Feb 9, 8:20, Robert Schaefer wrote:
What are all the different fiber dialects of 10Mbit
ethernet? 10bFL,
10bFOILR, any others?
FOIRL (it's not called 10baseFOIRL) is Fibre Optic Inter-Repeater Link, and
as the name implies was originally used to links hubs (repeaters) or
bridges. One of it's chief advantages was length, FOIRL lines can be up to
1km, whereas 10base2 is limited to 185m and 10base5 to 500m. The
transceivers (with AUI connectors) came a little later, and can also be
used on individual machines, of course, though they're not strictly part of
the standard.
10baseFL is the successor, same speed, completely backwards compatible, but
enhanced range (2km).
There are two other 10baseF standards. 10baseFB is for backbones, and
allows more than the usual number of repeaters. It uses different
signaling protocols, isn't compatible with anything else, and I've never
seen any, so I assume it wasn't common. 10baseFP is mentioned in the
standard as a passive method of interconnecting computers without repeaters
(hubs) but I never even heard of anyone implementing it.
--
Pete Peter Turnbull
Network Manager
University of York