H.323 Codec Fallback Configuration Note that you configure this feature for your global H.323 configuration, so it has an impact on all H.323 traffic on your system. To enable H.323 codec fallback: In Superuser mode, type configure terminal and press Enter. ORACLE# configure terminal Type session-router and press Enter to access the signaling-related configurations. ORACLE(configure)# session-router Type h323 and press Enter. The system prompt will change to let you know that you can configure individual ORACLE(session-router)# h323 codec-fallback—Enable or disable the H.323 codec fallback feature. The default value is disabled. Valid values are: enabled | disabled