25 Aug
2010
25 Aug
'10
9:02 p.m.
On Tue, 24 Aug 2010, Brent Hilpert wrote:
If both modems in a given connection are older
('80s), lower-speed
(300-1200/2400) it will likely work by simply connecting them together
and commanding one off-hook in answer mode (ATA ?), then the other
off-hook in originate mode (ATD ? ATH1 ?). I have successfully done
this with particular modems up to 14.4Kbps but might be forgetting the
commands.
Many of my older modems are from BEFORE "Hayes Compatible" became the
standard for giving commands to the modem.
BTW, Joe Campbell ("RS232 Solution", "C Programmer's Guide to Serial
Communication", etc.) got hired later by Hayes to document just what the
Hayes "standard" consisted of, because there were numerous variation in
commands between Hayes' own modems!
--
Grumpy Ol' Fred cisin at xenosoft.com