CLCOR Voice Gateways And Session Border Controllers Practice Question
A CUBE is configured for H.450.3 call forwarding, but it is not working. What is the most likely cause?
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
✓
Incompatible signaling protocol
H.450.3 is an H.323 supplementary service, which requires specific H.323 configuration and is often incompatible with SIP-based CUBE deployments without proper interworking.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Dial-peer not defined
Why it's wrong here
This would prevent all calls.
- ✓
Incompatible signaling protocol
Why this is correct
H.450 is H.323-based and doesn't translate natively to SIP supplementary services without gateway interworking.
- ✗
Codec mismatch
Why it's wrong here
This would cause 488 errors.
- ✗
SIP profile missing
Why it's wrong here
SIP profiles don't fix H.323 supplementary services.
About these practice questions
This CLCOR question is part of Courseiva's 263-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.