----- Original Message -----
From: "Pete Turnbull" <pete_at_dunnington.u-net.com>
To: <classiccmp_at_classiccmp.org>
Sent: Saturday, February 09, 2002 01:11 PM
Subject: Re: 10Base-FL
> 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.
Interesting. I don't know too much about the kit I have (I would
desperately love info on the raylan fiber concentrator &| it's SNMP card)
but from what I did see it's pretty standard 10bFL. The tranceivers are
`ORnet FIBER OPTIC TRANCEIVER' by chipcom. Model 9301T-ST, about 4" x 4" x
2", and every bit of a pound and a half. when I connected the tranceiver to
the concentrator, the diag led on the tranceiver indicated `invalid data'.
That was just the carrier-- nothing else was plugged into the concentrator.
Perhaps I didn't test it enough-- there are three DIP switches on the end.
>
> --
> Pete Peter Turnbull
Bob
Received on Sat Feb 09 2002 - 15:29:15 GMT