Implementing Cisco Collaboration Devices (CICD, legacy) — Question 107

A network engineer receives a report about poor quality on an active call between the IP phone of user A over the WAN to the IP phone of user B. Using web access to the phone, the network engineer remotely checks call statistics such as jitter, network delay, and packet loss. Calculated packet loss is 3%, average jitter is 20 ms, network delay is 1 ms, and conceal seconds is 7.

What is the most likely problem with this call?

Answer options

• A. Calculated packet loss is too high.
• B. Average jitter is too high.
• C. Network delay is too high.
• D. Conceal seconds are too high.

Correct answer: A

Explanation

The calculated packet loss of 3% is generally considered excessive for voice calls, which can lead to noticeable quality degradation. Average jitter of 20 ms and network delay of 1 ms are within acceptable limits for VoIP calls, while conceal seconds of 7 does not directly indicate a problem with the call quality in this context.