An IP-based VTC system implementing a single CODEC supporting conferences on multiple networks having different classification levels must be implemented in a manner such that configuration information for a network having a higher classification level is not disclosed to a network having a lower classification level.

Connecting the CODEC to a network while it is being reconfigured could lead to the disclosure of sensitive configuration information for a network having a higher classification level to a network having a lower classification level. Ideally, the CODEC will be disconnected from any network while it is being reconfigured. However, the requirement can be met by using a procedure that purges the configuration for the currently connected network, power cycling the CODEC as required (for a minimum of 60 seconds per another requirement) as the CODEC is switched to the next network, then reconfigures the CODEC for the next session.