CLCOR Protocols And Endpoints Practice Question
You are troubleshooting a scenario where G.711 is being used instead of the expected Opus codec between two endpoints in the same region. What is the most likely cause in the CUCM configuration?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Audio Codec Preference List
If the 'Audio Codec Preference List' or the 'Region' setting does not include Opus as a supported codec, CUCM will fall back to G.711.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Audio Codec Preference List
Why this is correct
The codec preference list dictates the order and availability of codecs.
- ✗
Phone NTP settings
Why it's wrong here
NTP is for time synchronization.
- ✗
SIP Trunk Security Profile mismatch
Why it's wrong here
This affects signaling security, not codec selection.
- ✗
Location-based bandwidth limit
Why it's wrong here
This limits total calls, not individual codec types.
About these practice questions
Courseiva writes every CLCOR question from scratch — 263 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Cisco exam blueprint
This CLCOR practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLCOR exam.