While developing a real-time VoIP application on a Cisco Webex platform, users report that their voice gets chopped or parts of the conversation drop out. Which network constraint is impacting the application?
B should be the correct answer. Choppy voices and drop-outs are typically due to dropped packets, not jitter. Dropped packets are typically due to circuit capacity issues.
Jitter would cause something more like those robotic sounding voices, but not full drop-outs. Jitter means all the data is getting there, but in a less than timely fashion. It shouldn't cause full drop-outs.
Capacity problems can also cause jitter due to queueing, but again... jitter shouldn't cause full drop-outs. That would typically be caused by dropped packets.
Jitter can cause audio drop-outs if the delay is high enough that the receiver considers the packets missing. Jitter buffers can help with this, but does not solve cases of very high jitter which can be caused by capacity issues. "If the jitter is so large that it causes packets to be received out of the range of this buffer, the out-of-range packets are discarded and dropouts are heard in the audio. For losses as small as one packet, the DSP interpolates what it thinks the audio should be and no problem is audible. When jitter exceeds what the DSP can do to make up for the missing packets, audio problems are heard."
Source: https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/18902-jitter-packet-voice.html
Yes. "The main effects of jitter on VoIP calls include dropped calls, missing words, and service disruptions."
https://www.liveagent.com/customer-support-glossary/jitter-voip/
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