Hi all,
I am having troubles in my task and need help.
I googled and tested thoroughly but have still no success.
I need to answer a call using a standard analog modem connected through
a serial port. But I don't answer to a dialing modem but to a special
automated phone device that is waiting for the digit tones 1 and #. Then
it considers the call answered OK. Otherwise it stops calling and needs
to be manually restarted by a technician that must travel there from a
distant location. The devices I want to respond to are used by lifts to
supervise them in a lift-making company.
Normally it is done well by picking up the phone, pressing the '1' and
'#' buttons (and hanging up the phone).
I need to simulate the using the modem (in Delphi). Now I communicate
with the modem using a component sending it AT commands over the serial
port:
...RING...
ATH1<crlf> (pick up) -- OK
ATDT,1,#;<crlf> (dial '1' and '#') --
-- it doesn't return OK;
-- when I press a second <crlf> and repeat the same command,
it succeeds. Why not the first time ??
-- isn't the line already hanged up after the second <crlf>??
ATH0 (hang up)
This is what I tried. I would be much appreciated by any help.
Pavel Reznicek
