Hi Mahesh,
Basically Pco is used either to connect MII or directly ECC.
go through below link for connectivity from Pco to ECC 6.0:
As of my knowledge, there won't be direct connectivity from Pco to sybase.
If sybase DB is of either MII system or ECC, then better go through below flow
Pco --> MII --> Sybase
Pco --> ECC -->Sybase
Regards,
Praveen Reddy