COURIER HIGH SPEED MODEMS
Return online with the On command, or hang up with the Hn command.
&D2 Normal DTR operations. The terminal or computer must send a DTR signal for the modem to accept commands. Dropping DTR terminates a call.
&Sn The modem sends the computer or terminal a Data Set Ready (DSR) signal via the
&S0 | DSR is always ON (override). Default. |
&S1 | In Originate mode, the modem sends the DSR after it |
| dials, when it detects the remote modem's answer tone. |
| In Answer mode, the modem sends the DSR after it |
| sends an answer tone. |
&S2 | This option is for specialized equipment such as |
| automatic callback units. On loss of carrier, the modem |
| sends a pulsed DSR signal with Clear to Send (CTS) |
| following Carrier Detect (CD). |
&S3 | This is the same as &S2, but without the CTS following |
| CD. |
&S4 | The modem sends the computer a DSR signal at the same |
| time that it sends the Carrier Detect (CD) signal. |
Flow Control
Flow control allows the modem to monitor the amount of data coming from the computer or the remote modem, and notify either end if its buffers are too full, so that they stop sending data for a moment.
The modem uses either hardware or software flow control. Your software and machine must support whichever type you select.
