CLCOR ON Premises Call Control Practice Question
A user reports that calls to an external PSTN number are failing. The trace shows a '403 Forbidden' response from the provider. Where in CUCM should the administrator investigate the outbound calling search space (CSS) settings?
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
✓
Device > Phone > CSS
The Device CSS or Line CSS determines the permissions for a specific device, and they must be configured to include the partition containing the route pattern.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Media Resources > Conference Bridge
Why it's wrong here
This configures media components, not call routing logic.
- ✗
System > Service Parameters
Why it's wrong here
Service parameters manage global service settings, not individual call permissions.
- ✗
Device > Trunk > Transformation CSS
Why it's wrong here
Transformation CSS handles number manipulation, not route permissions.
- ✓
Device > Phone > CSS
Why this is correct
This is the primary location for setting the CSS for the device.
About these practice questions
One of 263 original CLCOR practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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.