350-801 Question #487: Real Exam Question with Answer & Explanation

Question

An administrator must configure several audio codecs for optimal bandwidth utilization in a large Cisco UCM solution that includes a gateway to ensure audio quality without call failures. Where must a list of codecs be configured?

Options

• Aunder regions in the Cisco UCM
• Bunder service parameters in the Cisco UCM
• Cin the Cisco IOS router
• Din the Cisco ISDN gateway

Explanation

To configure a list of audio codecs for optimal bandwidth utilization and ensure audio quality in a Cisco UCM solution, an administrator must define them within regions in Cisco UCM. Regions control the maximum audio and video bandwidth for calls within and between different geographic locations, influencing codec selection.

Common mistakes.

• B. Service parameters in Cisco UCM govern global system settings, but they do not define or list specific audio codecs used for calls; that function is handled by regions.
• C. While Cisco IOS routers (which can act as gateways) support codec configuration, the question implies a centralized configuration for a "large Cisco UCM solution" including a gateway, which points to the UCM's region configuration as the overarching control.
• D. The Cisco ISDN gateway itself might be configured with codecs, but for a large Cisco UCM solution, the UCM's region configuration dictates the codec negotiation across the entire system, including what codecs are offered or preferred to the gateway.

Concept tested. Cisco UCM Regions and Codec Selection

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1/systemConfig/cucm_b_system-configuration-guide-1251/cucm_b_system-configuration-guide-1251_chapter_0100.html

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