Is it possible to access from a server the database of another server.

Hi,
I am using Teamcenter & in unix have ftpd the IMAN_DATA(unix) of the other server to this server & set all the environment variables(like ORACLE_HOME, IMAN_DATA) correctly.I have created a link that points to this path where i had ftpd the IMAN_DATA(unix).In IMAN_DATA which i had ftpd all the oracle environment variables are that of the server where it originally belonged.Still i am not able to connect to the other server database.
Do i need to modify tnsnames.ora in this server toinclude the SID of the other server from which i had ftpd? Please suggest any solutions.

Your machine will be a client, the oracle server will be the server. Your client will have different config to the server. Your client needs to be able to identify your server. Your server also needs a listener running to accept client connections. You need to find a howto document.