US Robotics 56K Series Manual page 66

W Waits for second dial
tone (X2 or X4); linked
to S6 register
@ (At Symbol) Dials, waits
for quiet answer, and
continues (X3 or higher)
$ (Dollar Sign) Displays a
list of Dial commands
En Sets local echo
E0 Echo OFF
E1 Modem displays
keyboard commands
60
Fn Sets online local echo of
transmitted data
ON/OFF
F0 Local echo ON;
modem sends a copy of
data, it sends to the
remote system to your
screen
F1 Local echo OFF;
receiving system may
send a remote echo of
data it receives
Hn Controls ON/OFF hook
H0 Hangs up (goes on
hook)
H1 Goes off hook