What causes audio to become distorted in Cisco UCM?

The correct answer is B. network packet loss and/or jitter. Audio distortion in VoIP/UCM environments is primarily caused by network packet loss and jitter. Packet loss results in missing audio samples, creating gaps or garbled sounds. Jitter (variation in packet arrival times) causes the de-jitter buffer to either under-run (gaps) or…

Media and QoS

Question

Options

Ahigh round-trip time for media
Bnetwork packet loss and/or jitter
CCisco UCM misconfiguration
Daudio codec negotiation mismatch

How the community answered

(22 responses)

A
5% (1)
B
95% (21)

Explanation

Audio distortion in VoIP/UCM environments is primarily caused by network packet loss and jitter. Packet loss results in missing audio samples, creating gaps or garbled sounds. Jitter (variation in packet arrival times) causes the de-jitter buffer to either under-run (gaps) or over-run (dropped packets), both producing distortion. High round-trip time (Option A) causes perceptible delay and echo but not distortion. A UCM misconfiguration (Option C) typically prevents calls from being established rather than distorting audio mid-call. A codec negotiation mismatch (Option D) would cause call setup failure, not in-call distortion.

Topics

#Audio Quality#Packet Loss#Jitter#VoIP Troubleshooting

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