jConnect™ for JDBC™ is the Sybase® high-performance JDBC driver. 
jConnect for JDBC is both: 
         
The protocol used by jConnect is Tabular Data Stream™
5.0 (TDS, version 5), the native protocol
for Adaptive Server Enterprise and Open
Server™ applications. jConnect implements the JDBC standard
to provide optimal connectivity to the complete family of Sybase
products, allowing access to over 25 enterprise and legacy systems,
including: 
 
In addition, jConnect for JDBC can access Oracle, AS/400,
and other data sources using Sybase DirectConnect.
In some instances, the jConnect implementation of JDBC deviates from the JDBC specifications.