AT Commands
H-4
This command controls whether or not the characters entered
from your computer keyboard are displayed on your monitor
(echoed) while the modem is in command mode.
E0
Disables echo to the computer.
E1
Enables echo to the computer (default).
Result Codes:
n = 0, 1
OK
Otherwise
ERROR
S
This command instructs the modem to go on-hook to
disconnect a call, or off-hook to make the phone line busy.
H0
Modem goes on-hook (default).
H1
Modem goes off-hook.
Result Codes:
n = 0, 1
OK
Otherwise
ERROR
Portégé 3500