Toshiba V.90 - Manual (Page 35)

AT Commands
AT command formats
16
En Echo command
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.
.
Result Codes:
Hn Hook control
This command instructs the modem to go on-hook to disconnect a
call, or off-hook to make the phone line busy.
@ Wait for quiet answer. Wait for five seconds of silence
after dialing the number. If silence is not detected, the
modem sends a NO ANSWER result code back to the
caller.
! Hook flash. Causes the modem to go on-hook for 0.5
seconds and then return to off-hook.
; Return to command mode. Causes the modem to return
to command mode after dialing a number, without
disconnecting the call.
L Redials last number. Should be the first character
following ATD; ignored otherwise.
$ Bong tone detection
E0 Disables echo to the computer.
E1 Enables echo to the computer (default).
OK n=0,1
ERROR Otherwise
H0 Modem goes on-hook (default).
H1 Modem goes off-hook.