A silent mode installation, sometimes referred to as an unattended installation, allows you to install the product using a response file to set default values, without any interaction required on your part.
Follow the same steps as you would for a console installation, but at the command line, enter:
setup.exe -silent -options REP.response -W SybaseLicense.agreeToLicense=true
Where:
REP.response – is the name of the file containing the installation options you chose.
-W SybaseLicense.agreeToLicense=true – specifies that you agree with the Sybase License Agreement text.