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Forty concurrent calls run fine at 8 AM on a BPO floor in Makati. By 10 AM, agents hear choppy audio and one-way silence, even though QoS is configured correctly on every switch and router in the building. The DSCP markings are there. The voice VLAN is isolated.

Smart’s 5G network scored 81.5 out of 100 on Opensignal’s Voice App Experience metric as of October 2025, edging out Globe and DITO in a statistically tight race. All three Philippine operators landed in the “Good” band (80–87 points) on that scale.

Packet captures are the wrong first step for VoIP diagnostics in nearly every Philippine enterprise scenario. The instinct to fire up Wireshark the moment a call drops or audio garbles wastes time, introduces privacy exposure, and skips over data your PBX and switches are already collecting.

Every Philippine government agency deploying VoIP must hold a valid Certificate of Registration (COR) from the National Telecommunications Commission, renewed annually at PhP 5,000, before a single IP phone powers on. NTC Memorandum Order No.