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Dn - Dial
This command instructs the modem to go off-hook and dial the number specified by the dial string
supplied as a command parameter. The execution of this command is affected by +FCLASS command
settings.
If +FCLASS=0 is selected, The modem will try to establish data connection with the remote modem after
the dialing is completed. If dial string is empty the modem will try to establish data connection
immediately. If remote modem is not detected within the time specified by S6 register, or if connection is
not established within a time specified by S7 register The modem will go on-hook return NO CARRIER
result code. Any character sent to The modem after the command but before CONNECT result code will
abort the connection.
If +FCLASS=1 is selected, The modem will go into fax V.21 receive mode after dialing. Any character sent
to the modem after the command but before modem finished dialing will abort the connection.
Dial Modifiers:
0123456789 - Phone number digits.
ABCD*# - Special DTMF digits (tone dialing only).
P Use pulse dialing
T Use tone dialing
B'oth 'P' & 'T' modifiers can be anywhere inside the dialing string.
The dialing after such modifier will be made using the method specified.
L Dial the last number. This modifier is valid only if it is the first symbol of the dial string.
All consecutive characters are discarded.
S=n Dial the number stored in the directory (n = 0 to 3).
! Hook flash. The modem will go on hook for .5 seconds then go back off hook.
W Wait for dial tone. The modem will wait for dial tone before dialing the following digits. If dial
tone is not detected within the time specified by S6 register the modem will go on-hook and
return NO DIAL TONE result code.
@ Wait for silence. The modem will wait for 5 seconds of silence before dialing the following
digits.
& or $ Wait for calling card prompt. If the calling card prompt signal is not detected within the time
specified by S6 register the modem will go off-hook and return NO DIAL TONE result code.
The prompt signal is also known as the "Bong" tone.
, or < Dial pause. The modem will wait a time specified by S8 before continue dialing.
; Return to command state. This modifier has to be the last on the dial string. This modifier
instructs the modem to return to command mode after finishing dialing.
The characters ( ) - and a space are ignored and can be used for dial string formatting.
En - Command Echo
This command controls the echoing of the characters in the command mode.
E0 Disables command echo
E1 Enables command echo. (default)