Place customSMSProvider.groovy here for LINUX =
/var/lib/tomcat7/webapps/sysaid/WEB-INF/conf/customSMSProvider.groovy

Place customSMSProvider.groovy here for WINDOWS =
C:\Program Files\SysAidServer\root\WEB-INF\conf\customSMSProvider.groovy

SysAid -> Settings -> Integration -> Text message
Provider Class = com.ilient.util.CustomSMSProvider
Gateway ID - HTTP = http://sms.pswin.com
Gateway ID - HTTPS = https://secure.pswin.com
User Name = YOURUSERNAME
Password = YOURPASSWORD
Sender ID = IKT%20Support

NOTE1: "Provider Class" is case sensitive and must be exactly "com.ilient.util.CustomSMSProvider"

NOTE2: To add space in "Sender ID" use %20