Once you have installed SQL*Net, you need to configure it to connect to
the SCT database in Geneva.  There are two ways to do this:

1.  (the best)  Run the Oracle 'SQL Net Easy Configuration' application
and create a new Database Alias with the following parameters:
        Database alias:         SCTDB
        Protocal:               TCP/IP
        Host Name:              melb.unige.ch
        Database Instance       acaprd

2. Edit the tnsnames.ora file in the Oracle/Network/Admin directory. 
Add the following information:

SCTPRD=(DESCRIPTION=
        (ADDRESS_LIST=
                (ADDRESS =
                        (COMMUNITY = tcp.world)
                        (PROTOCOL=TCP)
                        (HOST=melb.unige.ch)
                        (PORT=1521)
                )
        )
        (CONNECT_DATA=
                (SID=acaprd)
        )
 )
 

Once you have configured SQL*Net, you should be able to start up Omnis
and connect to the master database server in Geneva by selecting Master
Server from the Sessions menu.

If your institute has a firewall, you need to ask the administrator to allow 
access for port 1521.