350-801 · Question #156
End users report bad video quality and voice choppiness on Cisco Collaboration endpoints. The engineer changed the device pool the users were in but did not correct the problem. Which action should…
The correct answer is A. Set the service parameter Use Video Bandwidth Pool for Immersive Video Calls to "false". To troubleshoot bad video quality and voice choppiness that persists despite a device pool change, the engineer should set the service parameter "Use Video Bandwidth Pool for Immersive Video Calls" to "false". This action frees up bandwidth allocations that might be reserved…
Question
End users report bad video quality and voice choppiness on Cisco Collaboration endpoints. The engineer changed the device pool the users were in but did not correct the problem. Which action should be taken to troubleshoot this issue?
Options
- ASet the service parameter Use Video Bandwidth Pool for Immersive Video Calls to "false".
- BCheck for duplex/speed mismatches between the network port settings of the system and
- CRestart the Cisco Location Bandwidth Manager service on the Cisco UCM publisher.
- DUse direct IP address calls between two endpoints to troubleshoot call quality issues.
How the community answered
(22 responses)- A77% (17)
- B5% (1)
- C14% (3)
- D5% (1)
Why each option
To troubleshoot bad video quality and voice choppiness that persists despite a device pool change, the engineer should set the service parameter "Use Video Bandwidth Pool for Immersive Video Calls" to "false". This action frees up bandwidth allocations that might be reserved for immersive video, potentially improving call quality for standard video and voice.
The service parameter "Use Video Bandwidth Pool for Immersive Video Calls" set to "true" can reserve significant bandwidth, potentially impacting other video and voice calls. By setting it to "false," that reserved bandwidth is freed, which might alleviate congestion and improve the quality of regular video and voice calls experiencing choppiness and bad quality.
While duplex/speed mismatches can cause call quality issues, this is a network layer problem, and the question implies a system-level configuration issue given the previous attempt to change device pools.
Restarting the Cisco Location Bandwidth Manager service might temporarily resolve some issues, but it is often a disruptive step and does not address the underlying configuration that might be causing the problem if a specific bandwidth setting is misconfigured.
Using direct IP address calls between endpoints bypasses CUCM and certain network elements, which can help isolate if the issue is with CUCM configuration or the network; however, it does not directly solve the issue if the CUCM parameter is the root cause.
Concept tested: CUCM video bandwidth management
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/11_5_1/configAdmin/cucm_b_unified-communications-manager-administration-guide-115/cucm_b_unified-communications-manager-administration-guide-115_chapter_01010.html
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