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Appendix F – Modem AT Commands
Command:
Ds
Dial
Values:
s = dial string (phone number and dial modifiers)
Default:
none
Description:
Dial telephone number s, where s may up to 40 characters long and include the 0–9, *, #, ,
B, C, and D characters, and the L, P, T, V, W, S, comma (,), semicolon (;), !, @, ^ and $ dial
string modifiers.
Dial string modifiers:
L
P
T
V
W
,
;
!
@
^
$
Command:
DS=y
Dial Stored Telephone Number
Values:
n = 0–2 (0–1 for SMI-Parallel {internal})
Default:
none
Description:
Dial a number previously stored in directory number y by the &Zy=x command. Example:
ATDS=2
Command:
En
Echo Command Mode Characters
Values:
n = 0 or 1
Default:
1
Description:
E0
E1
Command:
Fn
Echo Online Data Characters
Values:
n = 1
Default:
1
F0
F1
Command:
Hn
Hook Control
Values:
n = 0 or 1
Default:
0
Description:
H0
H1
54
Redial last number. (Must be placed immediately after ATD.)
Pulse-dial following numbers in command.
Tone-dial following numbers in command (default).
Switch to speakerphone mode and dial the following number. Use ATH command to
hang up.
Wait for a new dial tone before continuing to dial. (X2, X4, X5, X6, or X7 must be
selected.)
Pause during dialing for time set in register S8.
Return to command mode after dialing. (Place at end of dial string.)
Hook flash. Causes the modem to go on-hook for one-half second, then off-hook
again.
Wait for quiet answer. Causes modem to wait for a ringback, then 5 seconds of
silence, before processing next part of command. If silence is not detected, the modem
returns a NO ANSWER code.
Disable data calling tone transmission.
Detect AT&T call card "bong" tone. The character should follow the phone number and
precede the user's call card number: ATDT1028806127853500$123456789
Do not echo keyboard input to the terminal.
Do echo keyboard input to the terminal.
Enable online data character echo. (Not supported.)
Disable online data character echo (included for backward compatibility with some
software).
Go on-hook (hang up).
Go off-hook (make the phone line busy).
Multi-Tech Systems, Inc. MultiAccess User Guide
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