| Modem Command Reference |
Examples |
|
AT&Q0 | Selects asynchronous operation in the Direct mode. |
| In this mode, the communications software speed |
| must match the telco line speed. |
AT&Q4 | Selects AutoSync operation. Is used in conjunction |
| with communications software that is compatible |
| with the Hayes Synchronous Interface (HSI). |
AT&Q5 | Selects error correction mode. Modem negotiates |
| an |
| configured to either disconnect or fallback to a |
| normal asynchronous connection if the link cannot |
| be negotiated (refer to register S36). |
| &Q5 and S36=0 Same as \N2 command (no |
| fallback) |
| &Q5 and S36=1 Same as \N3 command (fallback) |
AT&Q6 | Selects asynchronous operation in Normal mode |
| (Speed Buffering). In this mode, the communications |
| software speed can differ from the telco line speed. |
&Rn — RTS/CTS Option | |
Parameters | 0 or 1 |
Default | 0 |
Controls the state of the Clear To Send (/CTS) signal operation, this can be altered if hardware flow control is enabled. (see &K command).
Examples
AT&R0 | CTS acts according to V.25bis handshake (i.e. /CTS |
| tracks /RTS [Request To Send]) |
AT&R1 | The modem ignores /RTS;/CTS is always ON |
&Sn — DSR Option | |
Parameters | 0 or 1 |
Default | 0 |
Determines whether Data Set Ready (/DSR) operates in accordance with
Examples
AT&S0 | DSR is always ON |
AT&S1 | DSR is turned ON at start of handshaking and OFF |
| when carrier is lost |
User’s Guide and Reference | 4 - 23 |
