AT\N Asynchronous Operating Mode
The \N command allows you to select any of your modem’s four asynchronous operating modes. AT\N0 selects constant speed mode, enabling the modem to use different terminal and line speeds.
Your modem supports constant terminal speeds from 300 bps to 460,400 bps. For example, with constant speed selected the modem could connect with a remote system using V.22 (1200 bps) while communicating with your computer at 115,200 bps. Selecting constant speed mode also means the modem will not modify its terminal speed when answering incoming calls.
☞It is necessary to select flow control (&K command) between the modem and your computer when you use constant speed mode.
AT\N1 selects variable speed mode. With variable speed mode selected, the modem adjusts its terminal speed to match line speed. If the terminal speed is higher than the modem’s maximum line speed, the modem will attempt to connect using its highest speed.
☞Flow control will be ignored when your modem is configured for variable speed mode or is in local command state. Flow control is only available when the modem is configured for constant speed mode or reliable or
When answering, the modem automatically adjusts its terminal speed to match the standard used by the calling modem.
☞With variable speed mode selected, your modem’s terminal speed should not be changed once connected to another modem.
Changes to \N when
Options
AT\N0 | Constant speed mode |
AT\N1 | Variable speed mode |
AT\N2 | MNP Reliable mode |
AT\N3 ■ | V.42/MNP |
AT\N4 | V.42 reliable mode |
AT\N5 | V.42 |
AT\N6 | V.42/MNP reliable mode with fallback to MNP reliable mode, disconnect if |
| MNP not supported by remote modem. |
AT\N7 | MNP |
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