Because Sybase no longer provides ODBC drivers for back-end access to the target database, you must obtain a driver from your database vendor. Sybase supports and certifies these back-end drivers:
IBM DB2 CLI ODBC Driver
DataDirect Driver for DB2 and Microsoft SQL Server
Microsoft Driver for SQL Server on Microsoft Windows, which is downloadable and free
For more information, see the Enterprise Connect Data Access Installation Guide for your platform.