Starting with HyperCard 2.1, a new global property named "dialingTime" controls the amount of time the serial port will be kept open after a dial command. By default, this is set to 3 seconds. You can increase the time, as shown in the following sample script:
on mouseUp
set the dialingTime to 600 -- (600 ticks = 10 seconds)
dial "2551212" with modem "ATS0=0DT"
end mouseUp
For more information about the AT modem commands which can be used with your modem, consult your modem documentation.
This article was published in the 19 March 1997 "Information Alley."