This read-only enumerated value reports whether this leaf is a permanent virtual circuit (pvc, value 1) or a switched virtual circuit (svc, value 2), the fundamental classification of how the leaf's connection was established (statically provisioned versus dynamically signaled). This distinction determines which of the other leaf-specific objects are meaningful, since SVC-specific fields like cktLeafSvcCallingParty only apply when cktLeafType reports svc(2). An engineer writing a monitoring script that needs to know whether to expect calling/called party data for a given leaf would first check cktLeafType to decide whether the SVC-specific fields will be populated.