CHAPTER 4: AT Commands, S-Registers, and Result Codes

Command:

Qn

Result Codes Enable/Disable

Values:

 

n=0 or 1

Default:

 

0

Description:

Q0

Enable result codes.

 

Q1

Disable result codes.

 

Q2

Returns an OK for backward compatibility with

 

 

some software.

Command:

Sr=n

Set Register Value

Values:

 

r=S-register number; n varies

Default:

 

None

Description:

 

Set value of register Sr to value of n, where n is

 

 

entered in decimal format. For example, S0=1.

Command:

Sr?

Read Register Value

Values:

 

r=S-register number

Default:

 

None

Description:

 

Read value of register Sr and display it in 3-digit

 

 

decimal form. For example, S2? gives the response

 

 

043.

Command:

T

Tone Dialing

Values:

 

P, T

Default:

 

T

Description:

 

Configures the modem for DTMF (touchtone)

 

 

dialing. Dialed digits are tone dialed until a

 

 

P command or dial modifier is received.

Command:

Vn

Result Code Format

Values:

 

n=0 or 1

Default:

 

1

Description:

V0

Displays result codes as digits (terse response).

 

V1

Displays result codes as words (verbose response).

Command:

Wn

Result Code Options

Values:

 

n=0, 1, or 2

Default:

 

2

Description:

W0

CONNECT result code reports serial port speed,

 

 

disables protocol result codes.

 

W1

CONNECT result code reports serial port speed,

 

 

enables protocol result codes.

 

W2

CONNECT result code reports line speed, enables

 

 

protocol result codes.

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Black Box MD403A user manual Result Codes Enable/Disable, Sr=n Set Register Value, Sr? Read Register Value, Tone Dialing

MD403A specifications

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