These counters record values over the lifetime of a PVC. For
 counters that refer to use of the PVC by individual clients, see
 the x25 access port entity.
 o  accesses blocked
    Number of times an attempt to open a PVC has failed because of
    security.
 o  creation time
    Time at which this entity was created.
 o  data octets received
    Number of octets received by the PVC since it was created.
 o  data octets sent
    Number of octets sent by the PVC since it was created.
 o  data pdus received
    Number of data PDUs received by the PVC since it was created.
 o  data pdus sent
    Number of data PDUs sent by the PVC since it was created.
 o  pvc failures
    Number of times the PVC has failed while the entity has been
    allocated.