US Robotics COURIER HST User'smanual page 22

TESTING
COURIER HST
To verify that your modem is working properly, follow
these steps:
I. Tum on your computer or terminal and clear the screen.
Then turn the Courier's power switch ON. These front
indicator LEDs will light up:
HS High speed: 9600 bits per second
CD Carrier Detect (if you haven't changed the
factory setting of DIP switch
6)
TR Data Terminal Ready (if you haven't changed
the factory setting of DIP switch
I)
MR Modem Ready/Power
RS Request to Send, if your computer/terminal
supports RTS on the RS-232C interface
CS Clear to Send
2. If you're using a personal computer, load your tele-
communications software and put your computer in Ter-
minal Mode. This causes the computer to function as a
terminal rather than a processor: everything you type at
the keyboard goes directly to the modem.
If
necessary,
refer to your communications software documentation
for instructions.
3. Next, check to see if your machine and modem are com-
municating with each other by entering the command
to get the modem's "attention." (Type either upper or
lower case letters, not a combination. In this manual,
the Carriage Return or Enter key required to issue com-
mands is represented by the symbol <er>. Don't type
the angle brackets.)
Type the following:
AT <er>
If everything is correct, the modem responds as follows:
OK
NOTE: The AT command is used alone to check the
modem/terminal interface. AT is also the mandatory
prefix for all other commands except A/ and A>, used to
repeat execution of the command in the command buffer,
and
+ + +,
the escape code. These exceptions are
explained in Chapter 6.
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