I was playing around and I found this excellent Document about how to send SMS from SAP, from Dinesh Singh,
I found another nice blog that have all the steps for the configuration.
My idea is help you in test this funcionality
You need to open an account in http://www.smsglobal.com/ and then go to the API Keys
Now you can go to SCOT and Update the URL connection using the following.
Now you are able to send SMS from SAP :-))