Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 31 12/24/2010
<n> 1-15-254 Number of tenths seconds of delay
Reference
V.25ter
Note
2.2.24 ATT Select Tone Dialing
ATT Select Tone Dialing
Execution
Command
ATT
Response
OK
Reference
V.25ter
Note
No effect in GSM
2.2.25 ATV TA Response Format
ATV TA Response Format
Response
This parameter setting determines the contents of the header and trailer
transmitted with result codes and information responses.
When <value>=0
0
When <value>=1
OK
Execution
Command
ATV<value>
Parameter
<value> 0 Information response: <text><CR><LF>
Short result code format: <numeric code><CR>
1 Information response: <CR><LF><text><CR><LF>
Long result code format: <CR><LF><verbose code>
<CR><LF>
The result codes, their numeric equivalents and brief descriptions of the use
of each are listed in the following table.
Reference
V.25ter
Note
ATV1 ATV0 Description
OK 0 Acknowledges execution of a Command
CONNECT 1 A connection has been established; the DCE is moving
from Command state to online data state
RING 2 The DCE has detected an incoming call signal from
network
NO CARRIER 3 The connection has been terminated or the attempt to
establish a connection failed
ERROR 4 Command not recognized, Command line maximum