SOAP is an XML schema.
It usually runs over HTTP (port 80), however.
Use the search: What port number does SOAP use?
Also mentioned in the thread: it uses port no.8084 To the firewall,
The URL http://www.mobilywebservices.com:86/SMSWebService/SMSIntegration.asmx?wsdl
you are trying to connect to has :86
behind it so it uses port 86
try this
Check if SOAP is installed with <?php phpinfo() ?>