Good afternoon Adaro ,
Had tried the SyBase and UnixODBC , the cake showed me that the class had not been met. As there was urgency in the course of the project changed the architecture for Windows Server 2008 using IIS , was enough to install PDO sqlsrv ( exclusively for Windows ) that the connection happened.
I continue the search, as I believe we can find cases that will not be possible to use IIS and SQLServer will need . If you think something pass , I perform the tests.