Troubleshooting Jitter in Voice Quality: Essential Areas to Inspect
Question
An engineer with troubleshoots poor voice quality on multiple calls.
After looking at packet captures, the engineer notices high levels of jitter.
Which two areas does the engineer check to prevent jitter? (Choose two.)
Answers
Explanations
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A. B. C. D. E.AE.
https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/20371-troubleshoot-qos-voice.htmlJitter is the variation in the arrival time of packets. Jitter can cause poor voice quality and can be caused by network congestion, network delay, and network packet loss. In order to prevent jitter, the following two areas need to be checked:
A. The network meets bandwidth requirements: Insufficient bandwidth can cause congestion and delays, which can lead to jitter. The engineer needs to ensure that the network has sufficient bandwidth to support the voice traffic. The engineer can use tools like Quality of Service (QoS) to prioritize voice traffic over other types of traffic.
E. Voice packets are classified and marked: Voice packets need to be classified and marked with the correct QoS values. This will ensure that the voice traffic is given priority over other types of traffic. The engineer can use tools like QoS to classify and mark the voice packets.
B. MTP is enabled on the SIP trunk to Cisco Unified Border Element: This option is incorrect. MTP is used to provide media termination services, such as transcoding and encryption. It is not used to prevent jitter.
C. Cisco UBE manages voice traffic, not data traffic: This option is incorrect. Cisco UBE can be used to manage both voice and data traffic.
D. All devices use wired connections instead of wireless connections: This option is incorrect. While wired connections are generally more reliable than wireless connections, they do not necessarily prevent jitter.
