Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 25 12/24/2010
2.2.9 ATI Display Product Identification Information
ATI Display Product Identification Information
Execution
Command
ATI
Response
TA issues product information text
Example:
SIM900 R11.0
OK
Reference
V.25ter
Note
2.2.10 ATL Set Monitor speaker loudness
ATL Set Monitor speaker loudness
Response
OK
Execution
Command
ATL<value>
Parameter
<value> 0..9 volume
Reference
V.25ter
Note
No effect in GSM
2.2.11 ATM Set Monitor Speaker Mode
ATM Set Monitor Speaker Mode
Response
OK
Execution
Command
ATM<value>
Parameter
<value> 0..9 mode
Reference
V.25ter
Note
No effect in GSM
2.2.12 +++ Switch from Data Mode or PPP Online Mode to Command Mode
+++ Switch from Data Mode or PPP Online Mode to Command Mode
Execution
Command
+++
Response
The +++ character sequence causes the TA to cancel the data flow over the
AT interface and switch to Command mode. This allows you to enter AT
Command while maintaining the data connection to the remote server.
OK
To prevent the +++ escape sequence from being misinterpreted as data, it
should comply to following sequence: