5. When the other person hears the
high-pitched tone, he/she should
set the
Modem II
POWER
Switch
to ON.
6. When the other person hears a
low-pitch tone, he/she
should hang-up the phone.
You can then begin communicating
with each other by typing
on your computer's keyboards.
AUTO/ORIGinate Mode
Operation
Automatic dialing requires that you use programs
that have
drivers
and
receivers
or write your
own program to dial a phone number. Programs
that successfully fulfill your needs can
sometimes become quite complicated. If you
want
to
write AUTO/ORIGinate programs,
carefully read the section of this manual entitled
Technical and Programming Information and
refer
to
the Appendixes.
To use the Modem II in
AUTO/ORIGinate Mode under
VIDTEX:
1
.
Set the Modem's FORCE DTR
Switch
to
ON.
2. Enter programming mode (send an
*).
The TR
Light
will
illuminate and the
*
will echo on the
Screen,
3
.
Type a Modem command and phone
number. Press X to dial
the number.
4.
Begin
communications when the CD Light
comes ON.
The Modem II
remembers program data until
you change modes or turn
the POWER OFF.
Hints and Tips on Automatic
Operation . . .
•
The Modem II always checks the front
panel switch settings on
power-up and after a
disconnect.
•
Test Mode
(when the TEST Switch is set to
either LOCal or
REMote) has priority
over
all
other
switches. That is if you set the MODE
Switches and then the
TEST Switch, the Modem
II
will always run the Test.
•
If you program
the Modem in Automatic Mode,
the software
commands will
"override"
the
front
panel switches only once. After that
first override, the
action of the Modem
will
be
based on the
switch settings. To
override
again,
you must go into
programming mode and
re-execute the Modem II program.
9
You can change the
switch settings during
communications without
interruption.
However,
if
you set the TEST
Switch to REMote, the Modem
will simulate
half-duplex and (if the Host
isn't using half-duplex)
your Video Screen will display
double-characters. If you
are
communicating
with another person and both of you
set the TEST
Switch
to REM,
communication
will
end.
See Technical and Programming
Information and
Appendix B for details on
"unattended
use" of the Modem II.
Simulating Half-Duplex
To simulate half-duplex
mode, set the Test
Switch
to
REM after
making contact with another
computer. If your
display shows two characters
for every character
you type, you should
not be
simulating half
duplex
—
set your TEST
Switch
to
OFF and
proceed as usual.
13
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