Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 32 15.01.2010
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
length exceeded, parameter value invalid, or other
problem with processing the Command line
NO DIALTONE 6 No dial tone detected
BUSY 7 Engaged (busy) signal detected
NO ANSWER 8 "@" (Wait for Quiet Answer) dial modifier was used,
but remote ringing followed by five seconds of silence
was not detected before expiration of the connection
timer (S7)
PROCEEDING 9 An AT command is being processed
CONNECT
<text>
Manufacturer-
specific
Same as CONNECT, but includes
manufacturer-specific text that may specify DTE speed,
line speed, error control, data compression, or other
status
2.2.24 ATX Set CONNECT Result Code Format And Monitor Call Progress
ATX Set CONNECT Result Code Format And Monitor Call Progress