You still need to make your adjustments in Stratagy Admin since you still need to define the extension numbers to the ports in the Stratagy database. From the main menu go to Configuration-->Telephone System Integration. At the bottom part of the screen scroll down until you see the IP address of the CIX. Make the change. Then click the Voice Ports tab and define the extension numbers 51-54 for each of the Stratagy ports. Reboot or restart the Stratagy service. It's in the I&M manual page 11-4.