This is an old revision of the document!
http://www.14core.com/wiring-the-neoway-industrial-type-m590-m590e-gsmgprs-sms-notification/
http://www.simcom.eu/index.php?m=termekek&prime=1&sub=40&id=0000000246
http://forums.netduino.com/index.php?/topic/8637-need-for-a-good-gsmsmsgprs-library/
