Hi Aryanos, for this you need an SMS gateway, I have used
http://www.clickatell.com/products/sms_gateway.php in the past
it can do one way and two way so you could send a sms and receive a response, ie """""alarm set off in datacentre... reply with '1' to raise support ticket, '2' to alert on call staff, '3' suppress alarm."""""
as I say ive used this service before its not free however its very good...
Hope this helps.
Jon