On 25 Dec 97 08:50am, Mike Bilow wrote to William Hargrave:
 MB> William Hargrave wrote in a message to Mike Bilow:
 WH> Is there such a thing as twisted pair Arcnet? I've got a
 WH> card here that Win95 ID's as SMC Arcnet - it has a BNC and
 WH> two US-type phone jacks (RJ-11?), plus a red and green LED
 WH> and back of DIP switches.
 WH> Has jumpers inside for IRQ's and BNC/Twist selection.
 WH> Any ideas?
 MB> Yes, there are such cards.  The PC370E was a common example.
 MB> You don't actually even need twisted pair, and these will work
 MB> with ordinary flat telephone extension cords.  You can connect
 MB> them either in a star topology through an ARCnet hub, or you
 MB> can simply daisy-chain the cards to each other using patch
 MB> cords.  If you don't connect cable to both RJ-11 jacks, then
 MB> you need to place a 100-ohm terminating resistor across the
 MB> center two pins (which are the only ones used) of the unused
 MB> jack.
 MB> The DIP switch block on the card usually selects the card ID,
 MB> not base address or IRQ.  Most ARCnet cards have a very limited
 MB> range for address and IRQ.
CNET made various models of ArcNet RJ-11-style cards.  This
gentleman, if looking for such, might want to attempt to find:
        120SBT
        160SBT
        190SBT
The first card is an 8-bit variety.  The other two are 16-Bit.  The
SBT-model cards give you all three topology connectors, Coax, AUI and
RJ11 connectors.  There are variations to these cards providing just one
or two of the three types of connectors but the models mentioned above
were the most popular.
George
... Don't worry if you're a kleptomaniac, you can always take something for 
it.
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