Siebel Communications Server Administration Guide > Using Wireless Messaging > Configuring Wireless Messaging >
Connecting Directly to Wireless Network Operators
For outbound wireless messaging, you must connect to all the operators required to reach the entire population of wireless message recipients. You can use outbound wireless messaging only if the network operators make public a connection to an SMTP server. This SMTP server receives a message in email format from the Siebel application, converts it to SMS format, and forwards it to the wireless message recipient specified by the Siebel application.