3 AT Commands, Result Codes, and S-Registers

Command:

Bn

Communication Standard Setting

Values:

 

n = 0–3, 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 0–9, *, #, 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.

MT5634ZPX-PCI

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Multi-Tech Systems MT5634ZPX-PCI AT Commands, Result Codes, and S-Registers, Communication Standard Setting, Dial, Atd