We have a customer who wants Dynatrace SaaS to send problem notification to their SMS Center. They do not use PagerDuty or OpsGenie. Since we do not support SMPP for SMS, they have another gateway, called SMSGW. The SMSGW supports web call back. If Dynatrace SaaS supports web call back, then the process flows will be
1. Dynatrace raises web call back to the SMSGW;
2. SMSGW reads the web call back, and then sends message to SMS Center.