sim900a module issues

[sp2012]

Hi to all,
I am using sim900a for my projetcs.After i given power to module the module status led always 300ms on and 600ms off.can anybody send reference schematics for SIM900a please.

 

[TiagoRibeiro]

Hello, check this out, maybe it's what you want.
ftp://imall.iteadstudio.com/Modules/IM120525010_SIM900_module/SCH_IM120525010_GPRS_Module.pdf
ftp://imall.iteadstudio.com/Modules/IM120525010_SIM900_module/DS_IM120525010_GPRS_Module.pdf