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3 AT Commands, Result Codes, and S-Registers
MT5634ZPX-PCI 35
Command: Bn Communication Standard Setting
Values: n = 03, 15, 16
Default: 1 and 16
Description: B0 Select ITU-T V.22 mode when modem is at 1200 bps.
B1 Select Bell 212A when modem is at 1200 bps.
B2 Deselect V.23 reverse channel (same as B3).
B3 Deselect V.23 reverse channel (same as B2).
B15 Select V.21 when the modem is at 300 bps.
B16 Select Bell 103J when the modem is at 300 bps.
Command: Cn Carrier Control
Values: n = 1
Default: 1
Description: C0 Transmit carrier always off. (Not supported.)
C1 Normal transmit carrier switching (included for backward
compatibility with some software).
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 09, *, #, A, 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.)
S Dial a telephone number previously stored using the
&Zn=x command (see &Zn=x command for further
information). The range of n is 0-3.
, 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.