3B2 Boards

[Kevin Darcy]

In article <1991Jan25.121030.22669 at cbnews.att.com> mvadh at cbnews.att.com (andrew.d.hay) writes:
>pnelson at amriver.uucp (Paul Nelson) writes:
>
>
>"   I received a 3B2/310 and have been able to identify all
>"the boards except 2.
>"   One board has a 37 hole socket facing outward, on the
>"left side of the board, with a little LED just to the left
>"of it. The stamp on this board says KS-23267-L2-M.
>
>i think this is an x.25 card.  i don't know the details of the
>interface, but 2 rs232(v.35?) synchronous cables attach to it and
>terminate in db25s.

Close! Have a cigar.

It's an ISC card. _I_ntelligent _S_erial _C_ontroller. X.25 is -one- of the 
things which can be run on it, but on this continent, it's more likely to be
used for SNA/sdlc/bisync/RJE/LU6.2 (i.e. Big Blue protocols). Supposedly, it
handles speeds up to 56K, but we have buffering problems even at 9.6, and we 
only use -one- of the two cables!!!

Not exactly a good trade for an EPORTS boards if you're short on I/O slots...

Bon appetit!!

Drop me a line if you have any questions about these suckers.

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