This read-only enumerated INTEGER (lineTerminated, networkTerminated) reports the CPE's current operational mode, with all ports normally line-terminated except when a port is being used to acquire network timing. An admin checks this from the CPE side to confirm it agrees with the mode expected for that circuit. For example, a CPE unexpectedly reporting networkTerminated on a port that should be a standard customer line suggests a misconfiguration that needs correcting before the circuit will behave normally.