Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 20 23.06.2010
Response
This Command can be used to dial a phone number from current phonebook
memory.
Note: This Command may be aborted generally by receiving an ATH
Command or a character during execution. The aborting is not possible
during some states of connection establishment such as handshaking.
If error is related to ME functionality
+CME ERROR: <err>
If no dial tone and (parameter setting ATX2 or ATX4)
NO DIALTONE
If busy and (parameter setting ATX3 or ATX4)
BUSY
If a connection cannot be established
NO CARRIER
If the remote station does not answer
NO ANSWER
If connection successful and non-voice call.
CONNECT<text> TA switches to data mode.
Note: <text> output only if ATX<value> parameter setting with the
<value> >0
When TA returns to Command mode after call release
OK
If successfully connected and voice call
OK
Execution
Command
ATD><n>[<clir>
][ <cug>][;]
Parameters
<n> Integer type memory location should be in the range of
locations available in the memory used
<mgsm> string of GSM modifiers:
<clir>
I Override the CLIR supplementary service subscription
default value for this call
Invocation (restrict CLI presentation)
i Override the CLIR supplementary service subscription
default value for this call