3.1.4.1.3.2 tSupportedService

The tSupportedService complex type contains the type of message delivery service this server supports.

 <xs:complexType name="tSupportedService">
     <xs:sequence minOccurs="1" maxOccurs="2">
         <xs:element name="SMS_SENDER" type="tns:tSMS_SENDER" minOccurs="0" />
         <xs:element name="MMS_SENDER" type="tns:tMMS_SENDER" minOccurs="0" />
     </xs:sequence>
 </xs:complexType>

SMS_SENDER: Indicates that this server supports text message delivery. It MUST conform to the XML schema of the tSMS_SENDER complex type specified in section 3.1.4.1.3.3.

MMS_SENDER: Indicates that this server supports multimedia message delivery. It MUST conform to the XML schema of the tMMS_SENDER complex type specified in section 3.1.4.1.3.5.

Both elements here are optional, but at least one of them MUST be supported.