As its description states, this CienaGlobalState object suppresses or enables CFM Y.1731 Delay Variation measurement fault traps. Delay variation (jitter) measurement is specifically important for services with strict timing requirements, such as voice, video, or synchronization traffic, where an increase in delay variation degrades quality even if the link never actually drops packets. A carrier delivering an SLA-bound Ethernet private line for VoIP would enable this trap to be alerted the moment jitter on that circuit exceeds the SLA's committed threshold, well before customers start reporting call quality issues.