User Guide

Chapter 1 – AT Commands, S-Registers and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 9
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 Redial last number. (Must be placed immediately after ATD.)
P Pulse-dial following numbers in command.
T Tone-dial following numbers in command (default).
V Switch to speakerphone mode and dial the following number. Use ATH
command to hang up.
W 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
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 Do not echo keyboard input to the terminal.
E1 Do echo keyboard input to the terminal.
Command: Fn Echo Online Data Characters
Values: n = 1
Default: 1
F0 Enable online data character echo. (Not supported.)
F1 Disable online data character echo (included for backward compatibility with
some software).
Command: Hn Hook Control
Values: n = 0 or 1
Default: 0
Description: H0 Go on-hook (hang up).
H1 Go off-hook (make the phone line busy).