AT Commands
F-10 AT Commands
Example
Pulse dial a local telephone number and tone dial an access code and telephone number
by typing: ATD P5551234 T33 56789
W
(Wait for Dial Tone Before Dialing) Inserted between digits in a dial string, causes the
modem to wait for a second dial tone up to the register S7 time delay before dialing the
number. If the modem receives a dial tone before the register S7 delay expires, it
continues dialing. If it does not receive a dial tone, it displays NO DIALTONE and
hangs up.
Example
ATD 5551234 W 5556789
^A
(Link Negotiation) Perform link negotiation at 4800 bps for the current connection
only. (This dial modifier is equivalent to the *H2 command.)
,
(Pause During Dial) Inserted in a dial string, causes the modem to pause for the register
S8 delay before dialing the next digit. The default is 2 seconds. Use more than one
comma for a longer pause.
Example
When you need to dial {9} and pause for another dial tone before dialing an outside
line, do the following: ATD 9,,5551234
@
(Wait for Quiet Answer Before Dialing) Inserted between characters in a dial string
and causes the modem to wait for the register S7 time delay, for at least one ring
followed by five seconds of silence, before acting on the next character in the dial
string. If the modem does not detect this sequence, it displays NO ANSWER and hangs
up. Use this modifier when the system you are calling does not provide a dial tone.
Example
ATD 5551234 @ 43210
!
(Flash) Inserted between characters in a dial string, causes the modem to go on hook
for 1/2-second and then go back off hook, as though you depressed the switch-hook
button on your telephone.
;
(Return to Command State After Dialing) Added to the end of a dial string, tells the
modem to remain in command state after it dials the digits preceding the semicolon.
This lets you enter dial strings longer than 98 characters. After the final Dial command,
the modem tries to establish a connection. To abort dialing before you attempt to make
a connection, type ATH. Each Dial command except the last one must end with a
semicolon.
Example
ATD 9,5551234;
OK
ATD 5556789 @ 55512345678 W 344
+n
(Force Logon Sequence) Dial, connect, and perform the logon sequence n (where n=1-
9).
Example
To perform sequence 1, type: ATD1
