USRobotics V.34 - Manual (Page 170)

COURIER HIGH SPEED MODEMS
Synchronous Operations F-5
Offline Host/Modem Clock Speed
The second phase involves the data rate between the host
computer or terminal and its modem during offline mode. The
%N command is used to set the clock speed between the
modem and host, but this speed is only during offline mode,
before the synchronous connection is made.
The %N n command works in conjunction with &Xn. If the
modem is set so that it is the source of the Transmit clock timing
signals (&X0
 default), the %N n commands set the computer or
terminal-to-modem V.25 bis clock speed. If the modem is set to
&X1, the computer is the source of the Transmit clock signals.
If %N n is set to 0 or 1, you will receive an error message, since
they are not valid values. The %N n rates are as follows:
%N0 Reserved %N6 9600 bps (default)
%N1 Reserved %N7 12.K bps
%N2 1200 bps %N8 14.4K bps
%N3 2400 bps %N9 16.8K bps
%N4 4800 bps %N10 19.2K bps
%N5 7200 bps
Online Connection Rate
The &N command sets the data rate during the synchronous
connection.
If &N n is set for 2 − 10, the modem ignores the %N n rate and
follows the &N n rate to set the Online connection rate. The
&N n rates are as follows:
&N0 Variable (default) &N6 9600 bps
&N1 Reserved &N7 12K bps
&N2 1200 bps &N8 14.4K bps
&N3 2400 bps &N9 16.8K bps
&N4 4800 bps ( terbo − to − terbo only)
&N5 7200 bps &N10 19.2K bps
( terbo − to − terbo only)