Table 1: AT and AT& Commands
Command | Option | Description |
|
|
|
| &D2 | Disconnect call when DTR transitions from asserted to de- |
|
| asserted |
| &D3 | Reset modem parameters to default configuration when |
|
| DTR transitions from |
|
|
|
&F |
| Initialize modem to default factory configuration. |
|
|
|
&F90 |
| Initialize modem to V.90 configuration. |
|
|
|
&F92 |
| Initialize modem to V.92 configuration. |
|
|
|
&G |
| Guard Tone |
|
|
|
| &G0 | Off |
|
|
|
| &G1 | 550 Hz Guard Tone |
|
|
|
| &G2 | 1800 Hz Guard Tone |
|
|
|
&I |
| Dial TX Level |
|
|
|
| &In | Level n; n = 0 to 15. Default = 12 |
|
| Note: the default value is 15 for Japan country setting. |
|
|
|
| &I99 | Automatic Level |
|
|
|
&P |
| Pulse Cycle |
|
| Used when the modem is instructed to pulse dial. |
|
|
|
| &P0 | 40/60 Make/Break Ratio |
|
|
|
| &P1 | 33/67 Make/Break Ratio |
|
| Note: The default value is &P1 for Japan country setting. |
|
|
|
| &P2 | 38/62 Make/Break Ratio |
|
|
|
&R |
| CTS Control |
|
|
|
| &R0 | Normal |
|
|
|
| &R1 | Always On |
|
|
|
&S |
| DSR Control |
|
|
|
| &S0 | Always On |
|
|
|
| &S1 | On When Modem Recognizes Remote |
|
|
|
&T |
| Test |
|
|
|
| &T0 | Terminate Test |
|
|
|
| &T1 | Initiate Local Analog Loopback Test |
|
| Disconnect the telephone line from the modem line input |
|
| connector before using this command. |
|
| Set |
|
|
|
&V |
| Modem Status |
|
|
|
| &V0 | Short Form Report |
|
|
|
| &V1 | Current or Last Connection Report |
|
|
|
| &V2 | Long Form Report |
|
|
|
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