Command | Options | Function & Description |
Sr? |
| Display value stored in |
T |
| Ton dial |
Vn |
| Sets display type for Result Codes |
| V0 | Display result code in numeric form. (See the result code table of 'ATXn') |
| V1 * | Display result code in verbose form. |
Xn | Result code options, see the Options Table | |
| 5 * |
|
Zn | Reset modem and set | |
| n=2 | Reset modem and load factory settings. |
$ or ? |
| Basic command summary help |
&$ or &? |
| Extended ‘AT&’ command summary help |
*$ or *? |
| Extended ‘AT*’ command summary help |
Extended AT& Command Set
Command | Options | Function & Description |
&Bn |
| Data rate, |
| &B0 | DTE rate follows connection rate. (See also S44.6) |
| &B1 * | DTE/DCE rate fixed at DTE setting (See also S18, S20, and S44.6) |
&Cn |
| Carrier Detect (CD) options |
| &C0 | CD always ON |
| &C1 * | CD tracks presence of carrier |
&Dn |
| Data Terminal Ready (DTR) options |
| &D0 | Ignore DTR signal, assume DTR is always ON. |
| &D1 | 108.1, DTR |
| &D2 * | 108.2, Data Terminal Ready, DTR OFF causes the modem to hang up. |
| &D3 | Same as &D2 but DTR OFF causes the modem to hang up and reset from |
|
| profile 0. |
&F |
| Load factory settings to RAM as active configuration. |
&Gn |
| Guard tone options |
| &G0 * | No guard tone (within USA, Canada). |
| &G1 | 550 Hz guard tone. |
| &G2 | 1800 Hz guard tone. |
&Hn |
| Data flow control, DTE/DCE. |
| &H0 | Flow control disabled. |
| &H3 * | Hardware (CTS/RTS) flow control |
| &H4 | Software (XON/XOFF) flow control. |
&Kn |
| Modem error control and data compression. |
| &K0 | No error control. |
| &K1 | MNP4 |
| &K2 | MNP4+MNP5 |
| &K3 | V.42+MNP4. |
| &K4 * | V.42+V.42bis, compatible with &K2 |
&Mn |
| Synchronous/asynchronous mode selection |
| &M0 * | Asynchronous mode with data buffering |
| &M1 | Hayes AutoSync mode |
| &M2 | Direct asynchronous mode, no data buffering |
&Nn |
| Modem link mode options (DCE/DCE). |
| &N0 * | |
|
| V.32bis, V.32, V.22bis, V.22 and Bell 212A. |
