350-801 · Question #261
Callers from a branch report getting busy tones intermittently when trying to reach colleagues in other office branches during peak hours. An engineer collects Cisco CallManager service traces to exam
The correct answer is B. region configuration. Intermittent busy tones during peak hours between branches in Cisco UCM are a classic symptom of Call Admission Control (CAC) rejecting calls due to insufficient configured bandwidth. In UCM, Region configuration controls both codec selection and the maximum bandwidth allocated b
Question
Callers from a branch report getting busy tones intermittently when trying to reach colleagues in other office branches during peak hours. An engineer collects Cisco CallManager service traces to examine the situation. The traces show:
What should be fixed to resolve the issue?
Options
- Acodec configuration
- Bregion configuration
- Cclass of service configuration
- Dgeolocation configuration
How the community answered
(20 responses)- A5% (1)
- B75% (15)
- C15% (3)
- D5% (1)
Explanation
Intermittent busy tones during peak hours between branches in Cisco UCM are a classic symptom of Call Admission Control (CAC) rejecting calls due to insufficient configured bandwidth. In UCM, Region configuration controls both codec selection and the maximum bandwidth allocated between locations (inter-region bandwidth). When peak-hour call volume exhausts the configured bandwidth limit in the region pair settings, UCM rejects new calls with a busy signal. The fix is to review and increase the bandwidth allocation in the Region configuration (B) between the affected site regions. Option A (codec) affects quality but not call rejection. Option C (class of service) controls which users can call which destinations, not bandwidth limits. Option D (geolocation) is used for E911 and location-based routing, not bandwidth management.
Topics
Community Discussion
No community discussion yet for this question.