Re: SIA, Contact ID, 4/2, 3/1

["JohnO" <johno@@&%heathkit##.com>]

> I'll let Mark Leuck answer about SIA, but I can tell you about 4X2 3X2
> and CID.

(I've been out of town a few days...) I appreciate the SIA code list, but
that doesn't give me much in the way of the SIA Big Picture. Help me out,
Mark...

After a bit of googling, I found some posts from 2002 that say SIA is a
modem-based approach, where SIA has defined the signaling protocols and
alarm codes.

Questions: Is SIA widely used? Why or why not? Still 110 and 300 baud? ---Is
the idea that 110/300 is plenty fast enough for a pile of codes, and more
reliable than V.42bis and all that new fast stuff? These modems, are they
typically standard external boxes with serial cables, or built into the
panel or mainboard?

Thanks!

-John O