This read-create Unsigned32 represents the higher 32 bits of the SOAM Committed Information Rate on an F3 network port's QoS shaper, extending the SOAM CIR beyond a 32-bit value when needed. Administrators populate it only in the rare case that the reserved rate for OAM/CFM frames on that port must exceed what 32 bits alone can express. For example, on a very high-capacity trunk with an unusually generous SOAM allocation, this high-order field would be set alongside the low-order SOAM CIR object.