In the Company VOIP network, which two statements are true? (Select two).
A.
Voice packets are typically around 600 bytes to 1200 bytes.
B.
For voice quality, packet loss should be less than 2 percent and delay should be no
more than 250 ms.
C.
Voice packets are typically around 60 KB to 120 KB.
D.
For voice quality, packet loss should be less than 1 percent and delay should be no
more than 150 ms.
E.
A typical voice call requires 17 kbps to 106 kbps of guaranteed priority bandwidth
plus an additional 15 kbps per call for voice-control traffic.
F.
Voice packets are typically around 60 bytes to 120 bytes.
G.
Voice packets are typically around 6 bytes to 12 bytes
Explanation:
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
* Voice packets are typically small (60 to 120 bytes)
* 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) (not 15 kbps) per phone of guaranteed bandwidth for
voice control traffic
The choice of codec has impacts in many areas. The most important is the capacity planning
on the network, because the bandwidth consumed in different codecs varies.