JDBC Sender Channel problem. Pls help

Hi,

In JDBC Sender Channel in Connectiion String I am giving value

jdbc:oracle:thin:@cscappnoi022.asiapac.globalcsc.net:1527:IS1

where cscappnoi022.asiapac.globalcsc.net---is where Oracle server is installed

1527 --- is my Port

IS1 is my system SID --- Pls let me what value should come here and how to find.

I am getting error

"Error during database connection to the database URL 'jdbc:oracle:thin:@cscappnoi022.asiapac.globalcsc.net:1527:IS1' using the JDBC driver 'oracle.jdbc.driver.OracleDriver': 'com.sap.aii.adapter.jdbc.sql.DriverManagerException: Cannot establish connection to URL 'jdbc:oracle:thin:@cscappnoi022.asiapac.globalcsc.net:1527:IS1': SQLException: Io exception: The Network Adapter could not establish the connection'"

Regards