This simple flag tells the admin whether this circuit table entry represents a statically-provisioned PVC or a dynamically call-signaled SVC, which changes which other objects in the row are even meaningful, since SVC-specific fields like cktSvcCallingParty only apply when this reads svc. For example, seeing cktType read svc(2) tells the admin to look at cktSvcDuration and cktSvcCause for this entry's real status rather than expecting a permanently-provisioned circuit's static configuration to explain its current behavior.