8 Mar
2002
8 Mar
'02
4:42 a.m.
--- Doc <doc(a)mdrconsult.com> wrote:
On Fri, 8 Mar 2002, Dave McGuire wrote:
> > "Synchronous communications controller" sounds like it requires a
> > DMV11 on the other end as well.
>
> It's a sync serial interface...you'd connect it to a CSU/DSU and a
> leased line, or something similar.
I have at least one dial-up sync modem (from my HASP/3780/SNA days). ISTR
it's 2400 bps. Also, for in-room use, we used to use sync modem
eliminators - think of a null-modem for an async port, but add some
electronics to squirt out a baud rate clock on both ports on pin 15
and 17. We used to use COMBOARDs off the test bench to make our own
point-to-point HASP network for moving files from box to box. Beat
paying DEC for their DDCMP cards (we didn't have a single scrap of
Ethernet, even up through 1994).
-ethan
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