The stateful H323 processing is enabled by default
To disable it, use the following command:
(master) (config) #firewall disable-stateful-h323-processing
(master) (config) #show firewall | include 323
Stateful H.323 ProcessingDisabled
To re-enable it, use the following command:
(master) (config) #no firewall disable-stateful-h323-processing
(master) (config) #show firewall | include 323
Stateful H.323 ProcessingEnabled