>Unless they have redesigned the modems yet again (and why not, eh?) you
>may be able to put the modem into a known reset state by dropping DTR
>for a short time.

Moreover, many modems have a ATSxx=xx command that sets the behavior on
reset so you can evade doing this with the PIC (you just send ATZ). As to
DTR dropping, it's best to use no handshake (!) to save pins on the PIC,
and deliberately select a low data rate so you don't have timing problems,
and use simplex only. As to reset, the best way is to cycle the modem
power (using a PIC pin). Never seen a modem that failed to reset on that
;-). And I reset the modem after every callout (it was callout not
callin) because the modem was not powered when not needed. Experiments
with dialing worked with this setup so it can be used. I used a PIC16C54
(not 54A ;-).

hope this helps,

Peter

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