enum MtasFcdNotRegisteredBxDT

0-2 (0=UNCONDITIONALLY_EXECUTED, 1=CONDITIONALLY_EXECUTED, 2=TRIGGER_ON_SIP_480_RESPONSE)

`0`	`UNCONDITIONALLY_EXECUTED` FCD is always executed when served user is not registered.
`1`	`CONDITIONALLY_EXECUTED` FCD is only executed for a not registered user, when condition for not-registered is set.
`2`	`TRIGGER_ON_SIP_480_RESPONSE` FCD is executed for not registered users when 480 Temporarily Unavailable is received with pre-configured Q.850 Reason header.