Asterisks and SMS Gateway

I want to setup my asterisk machine to be able to send and receive sms through mobile app application. This is the recommendation from the mobile app vendor: "I understand you want to send and receive SMS from our softphone. According to 3gpp standard we support SMS using SIP MESSAGES. The flow is as follows, the SIP MESSAGE to given TEL URI is sent to the SIP server. from the sip server the message should be passed further to termination gsm provider. If the provider does not support SIP the messages should be converted to proper protocol on the server side. Another option which we support is sending SMS over https"