
COURIER HIGH SPEED MODEMS
at$
HELP, Command Quick Reference 
&$  | HELP, Ampersand Commands  | Kn  | n=0 Call Duration Mode  | 
%$  | HELP, Percent Commands  | 
  | n=1 Real Time Clock Mode  | 
A/  | Repeat Last Command  | Mn  | n=0 Speaker Off  | 
A>  | Continuously Repeat Command  | 
  | n=1 Speaker On Until CD  | 
AT  | Command Mode Prefix  | 
  | n=2 Speaker Always On  | 
A  | Answer Call  | 
  | n=3 Speaker Off During Dial  | 
Bn  | n=0 V.32 originate mode  | On  | n=0 Return Online  | 
  | n=1 HST originate mode  | 
  | n=1 Return Online & Retrain  | 
Cn  | n=0 Transmitter Off  | 
  | n=2 Return Online & Speed Shift  | 
  | n=1 Transmitter On  | P  | Pulse Dial  | 
Dn  | Dial a Telephone Number  | Qn  | n=0 Result Codes Sent  | 
  | n=0..9#*TPR,;"W@!()-  | 
  | n=1 Quiet (No Result Codes)  | 
DL  | Dial Last Phone Number  | 
  | n=2 Verbose/Quiet On Answer  | 
DSn  | Dial Stored Phone Number  | Sr=n  | Sets Register "r" to "n"  | 
D$  | HELP, Dial Commands  | Sr?  | Query Register "r"  | 
En  | n=0 No Command Echo  | S$  | HELP, S Registers  | 
  | n=1 Echo Command Chars  | T  | Tone Dial  | 
Fn  | n=0 Online Echo  | Vn  | n=0 Numeric Responses  | 
  | n=1 No Online Echo  | 
  | n=1 Verbal Responses  | 
Strike a key when ready . .
Figure 6.5⎯Sample Basic Commands HELP Screen
Extended Command Set (&$)
At AT&$, the Courier displays a screen that shows a partial summary of the extended ampersand command set. A second screen, activated by pressing any key, shows the remaining command set. The first screen is shown in Figure 6.6.
at&$
HELP, Ampersand Commands 
&An  | n=0 Disable /ARQ Result Codes  | &Nn  | n=0 Highest Link Speed  | 
  | n=1 Enable /ARQ Result Codes  | 
  | n=1 300 bps  | 
  | n=2 Enable /Modulation Codes  | 
  | n=2 1200 bps  | 
  | n=3 Enable /Extra Result Codes  | 
  | n=3 2400 bps  | 
&Bn  | n=0 Floating DTE Speed  | 
  | n=4 4800 bps  | 
  | n=1 Fixed DTE Speed  | 
  | n=5 7200 bps  | 
  | n=2 DTE Speed Fixed When ARQ  | 
  | n=6 9600 bps  | 
&Cn  | n=0 CD Always On  | 
  | n=7 12000 bps  | 
  | n=1 Modem Controls CD  | 
  | n=8 14400 bps  | 
&Dn  | n=0 Ignore DTR  | 
  | n=9 16800 bps  | 
  | n=1   | 
  | n=10 19200 bps  | 
  | n=2 DTE Controls DTR  | &Pn  | n=0 N.American Pulse Dial  | 
&Fn  | n=0 Load Factory Configuration  | 
  | n=1 UK Pulse Dial  | 
  | n=1 Hardware Flow Control Cnfg.  | &Rn  | n=0 CTS Follows RTS  | 
  | n=2 Software Flow Control Cnfg.  | 
  | n=1 Ignore RTS  | 
  | n=3 HST/Cellular w/ HW FC Cnfg.  | 
  | n=2 RX to DTE/RTS high  | 
&Gn  | n=0 No Guard Tone  | &Sn  | n=0 DSR Always On  | 
  | n=1 550 Hz Guard Tone  | 
  | n=1 Modem Controls DSR  | 
  | n=2 1800 Hz Guard Tone  | 
  | n=2 Pulse DSR, CTS=CD  | 
Strike any key when ready . . .
Figure 6.6⎯Sample Ampersand Commands HELP Screen
Queries and Help Screens