The result value can be displayed during communication. Generally, the result will be OK. According to the ATV command, the result can be displayed as Words or numeral letters. (ATV0 : Display as numeral letters, ATV1: Display as English words)

Basic AT Commands

A/

Repeats the previous command in the buffer

ATA

Responds manually to incoming RING signals

+++Switches from on-line mode to command mode

ATO

Switches from command mode to on-line mode

ATEn

Echo control

 

E0

Disables echoing of the commands to the screen

E1

Enables echoing of the commands to the screen

ATDT phone number

Touch tone dial

ATDP phone number

Pulse dial

ATHn

Hook control

 

H0

On-Hook (same as hang-up)

H1

Off-Hook (same as hold-on)

ATLn

Modem speaker loudness control

L0~1

Low volume

 

L2

Medium volume

L3

High volume

 

ATMn

Modem speaker control

M0

Disables modem speaker

M1

Enables only when in connection procedure

M2

Enables always

 

M3

Enables until carrier has been detected after connection

ATS0=n

Sets S0 register value (n range : 0~255). Sets the number of incoming

 

ring signals before answering. Modem responds after ringing as many

Using the Modem 47