How to configure SQL to listen on Multiple Ports?

Problem
Recently I came across a situation where an existing production SQL Server default instance was configured to use static TCP/IP port 48030 and the default 1433 port was disabled. A number of database applications are hosted on the same default SQL instance and these applications are connecting to SQL Server through port 48030. As per a new business requirement we need to host a new application database on the same SQL instance, but the application is unable to connect to the SQL instance because it us hard corded to use the default port 1433. In this tip we walk through how to configure a SQL instance to listen on multiple TCP/IP ports.

Solution
For solution please check http://www.mssqltips.com/sqlservertip/2493/configuring-sql-server-to-use-multiple-ports/ URL.