Has anyone seen consistent MOS gains switching from G.711 to Opus when packet loss sits around 1–2%? On a 50-seat site last week, moving to Opus (16 kHz, 20 ms ptime) and bumping jitter buffers to 60 ms on an AudioCodes SBC with DSCP EF 46 end-to-end cut PLC artifacts and raised MOS from about 3.6 to about 4.1; what ptime/jitter settings and verification tools are you trusting for one-way delay and stability checks in the field?