Data Set Ready (&Sn) - US Robotics COURIER User Manual

COURIER HIGH SPEED MODEMS
The options are as follows. Rates above 9600 bps are
valid only for V.32
bis and HST operations, not V.32
operations.
&N1
&N3
&NS
&N7
&N9
Data Set Ready (&Sn)
300 bps &N2 1200 bps
2400 bps &N4 4800 bps
7200 bps &N 6 9600 bps
12.K bps &NS 14.4K bps
16.SK bps (HST-to-HST only)
The modem sends the DTE a Data Set Ready (DSR) signal via the
RS-232 interface. (Data Set is industry jargon for modem.) Few,
if any, commercial communications programs require the
modem to control DSR, &S1. Leave the modem set for DSR
overridden, &SO, unless you know that your installation requires
a different setting.
&SO DSR is always ON (override). Default.
&S1 In Originate mode, the modem sends DSR after it dials,
when it detects the remote modem's answer tone. In
Answer mode, the modem sends 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 CTS following CD.
4-16 Interface Controls
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