Description: A table containing configuration information for a circuit. The objects in this table are always readable; they can only be written (if accessible) only for the instance in which the circuitConfPortNumber and circuitConfDLCI correspond to the port number and DLCI at the source (originate). When creating a new circuit, at a minimum the destination address must be supplied. Note: Before modifying any circuit configuration variables, the circuit must be disabled (set circuitConfState = 'disable').