US Robotics COURIER - Reversing Originate;Answer Frequencies (R); Dialing a Stored Number (Dsn); Redialing

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COURIER HIGH SPEED MODEMS
would (after 60 seconds). It then sends the message NO
ANSWER to the screen and aborts the command.
Reversing Originate/Answer Frequencies (R)
This command allows calls to an originate-only modem. It
reverses
the modem's originate/ answer frequencies, forcing the
Courier to dial out at the answer frequency. The command fol-
lows the Dial command, before or after the phone number:
AT D1234567R <Enter>
AT DR1234567 <Enter>
Dialing a Stored Number (DSn)
Chapter 5 includes instructions for storing up to four telephone
numbers in nonvolatile random access memory (NVRAM). To
have the modem dial a stored number use the DSn command,
where n is the number's position, 0-3, in NVRAM. In the first of
the next two examples, the phone number is stored at position 0,
assumed by the modem if there is no numeric parameter:
ATOS <Enter>
ATDS3 <Enter>
You can store a partial dial sequence, for example, the phone
number of a system, to which you might want to add different
codes for different extensions. Store
the phone number so that
you don't have to type it each time. Use the DSn command to
dial the number; then have the modem dial whichever code you
want, as in the following example. The phone number is stored
at position 1. Spaces in the command string are included here
only for readability.
AT OS 1 05678 <Enter>
REDIALING
The most frequent reason for redialing is receipt of a busy signal.
The
Courier provides three ways to redial, as follows.
Asynchronous Operations 6-7