AT commands

hello All,,

Quick question, what does (AT +CNMI = 2,2) mean for SIM900?

regards

See starting at the bottom of page 108:
[http://elecfreaks.com/store/download/datasheet/rf/SIM900/SIM900_AT%20Command%20Manual_V1.03.pdf](http://“http://elecfreaks.com/store/download/datasheet/rf/SIM900/SIM900_AT Command Manual_V1.03.pdf”)