This read-write switch controls traps generated when CFM's Y.1731 jitter measurement detects that delay variation on a monitored Ethernet path has exceeded a configured threshold, with disabling it suppressing those specific jitter alerts. Excessive jitter is a particularly disruptive impairment for real-time traffic like voice and video even when average delay and basic connectivity both look fine, so this trap category catches a failure mode the delay and connectivity traps would miss entirely. A customer describing choppy audio with garbled syllables, a classic jitter symptom distinct from the general lag associated with high delay, is exactly the kind of complaint that should prompt checking whether this jitter trap fired, and whether it's even enabled.