Chapter 4 - Command Mode
COMMAND 
+++AT
MODE
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HANG |
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| Dial (D or A) command, | ||
UP |
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| or incoming phone call | ||
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| WAIT FOR |
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| CARRIER |
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| No carrier |
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| Carrier detected | |||
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Carrier lost 
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| AT0 Command | |
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MODE |
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Figure 41. Functional Modes
4.2Summary of AT Commands
A wide variety of autodial operations and modem options can be controlled when the modem is in Command Mode. Remember, nearly all commands begin with AT.
These commands are organized into several functional groups. An alphabetical summary of commands is provided in Appendix D.
HOW TO | COMMANDS | |
DIAL | D | Dial |
| A: or : Continuous Redial | |
| $D | DTR Dialing |
| $VD | Voice/Data Dialing |
| N | Dial a Stored Number |
MODIFY DIALING | P/T | Pulse/Tone Dialing |
PROCEDURES | &P | Set Pulse Dial Ratios |
| , | Automatic Pauses in dialing |
| Y | Long Space Disconnect |
| W | Wait for New Dial Tone |
| ; | Return to Command Mode After Dial |
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| R | Reverse Mode of Operation |
| ! | Flash On Hook |
| $ | AT&T "Calling Card" Tones |
| @ | Quiet Answer |
MEMORIZE PHONE |
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NUMBERS | D...N | Store Phone Numbers |
| NN | Number Linking |
| L | List Numbers Stored in Memory |
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