USRobotics V.34 - Manual (Page 60)

COURIER HIGH SPEED MODEMS
Data Mode Operations 4-23
The options are as follows.
&N1 300 bps &N9 16.8K bps (HST, terbo,
&N2 1200 bps V.FC, and V.34 only)
&N3 2400 bps &N10 19.2K bps ( terbo, V.FC,
&N4 4800 bps and V.34 only)
&N5 7200 bps &N11 21.6K bps ( terbo, V.FC,
&N6 9600 bps and V.34 only)
&N7 12K bps &N12 24K bps (V.FC and V.34 only)
&N8 14.4K bps &N13 26.4K bps (V.FC and V.34 only)
&N14 28.8K bps (V.FC and V.34 only)
RS-232 Signal Operations
&C n Carrier Detect operations. At power-on and reset, the modem
operates according to the setting of DIP switch 6. This
command is not stored in nonvolatile memory as a power-
on/reset default.
&C0 CD override, CD always ON.
&C1 Normal CD operations. The Courier sends a CD signal
when it connects with another modem and drops the CD
when it disconnects.
&D n Data Terminal Ready (DTR) operations. At power-on and reset,
the modem operates according to the setting of DIP switch 1.
This command is not stored in nonvolatile memory as a power-
on/reset default.
&D0 DTR override. The modem operates as though the DTR
is always ON.
&D1 Advance usage: If issued before connecting with another
modem, the modem can enter online command mode
during a call by toggling DTR. (Most communications
software packages have a method for toggling DTR.)
&D1 functions similarly to the escape code (+++), except
that this setting is independent of DIP switch 9.
If DIP Switch 1 is ON (DTR override) when you issue the
&D1 command, the DTR override is automatically turned
off. However, if you change the setting of DIP switch 1
after issuing &D1, the DIP switch setting takes
precedence.