QoS Requirements for Voice
Voice calls, either one-to-one or on a conference connection capability, require the following:
≤ 150 ms of one-way latency from mouth to ear (per the ITU G.114 standard)
≤ 30 ms jitter
≤ 1 percent packet loss
17 to 106 kbps of guaranteed priority bandwidth per call (depending on the sampling rate, codec, and Layer 2 overhead)
150 bps (plus Layer 2 overhead) per phone of guaranteed bandwidth for voice control traffic
Very confusing. Saw somewhere that <1% is considered high quality voice but as they don't stress in the question "high quality" they may want the 5% ??
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