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COURIER HIGH SPEED MODEMS
4-6 Data Mode Operations
R Reverse frequencies. 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 follows the
Dial command, before or after the phone number:
AT D1234567R <Enter>
X2-X7 Adaptive dialing. When any of the X2 through X7 options is in
effect and you do not issue a dialing type in the Dial string, the
Courier uses tone dialing, which is faster than the default pulse
type. However, if the phone company's central office does not
have tone detection equipment, the modem cannot break dial
and continues to detect the dial tone. If this occurs, the modem
automatically reverts to pulse dialing.
DL Dial the last-dialed number. The modem stores each Dial
command until it receives the next Dial command. Use DL
instead of A/, described on the next page, if you wish to send
the modem non-Dial commands before dialing again.
DSn Dial the number stored in nonvolatile random access memory at
position n, where n = 0−9.
Cancel Dialing
To cancel Dial-command execution, press any key. If you
inadvertently hit a key on the keyboard while the modem is
dialing, the call is canceled. If this occurs, type the A/
command explained under Automated Redialing below.
When the modem receives a command, it stores the instruction
in its command buffer until it receives the next AT command.
Note that if you've sent the modem an additional command
since the Dial command, A/ re-executes that command instead
of redialing.