enum MtasSrvccReleaseReasonDT

Numeric Enumeration: 0-1 (0=RELEASE_REASON_DISABLED, 1=RELEASE_REASON_ENABLED)

References from:
MtasSrvcc;

0
RELEASE_REASON_DISABLED
When this attribute is set to 0, MTAS does not set Reason header in the outgoing termination request.
1
RELEASE_REASON_ENABLED
When this attribute is set to 1, MTAS uses the pre-configured Reason header in the outgoing CANCEL/BYE to release the PS leg.