Voice and Video

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Contributor I

Vocera issues - Poor call quality

We have an SSID dedicated to Vocera badges (B1000 & B2000 b/g only)with WMM enabled. There are only 32 clients badges. Users are complaining of poor quality and dropped calls. I enabled voice real time analysis and I'm seeing jitter and dropped packets during calls.

We also have Ascom phones deployed on another SSID and no issues there whatsoever..so I'm thinking it's an issue with Vocera only.

Output of Real-Time Analysis is attached. Thanks
Guru Elite

Re: Vocera issues - Poor call quality


We have an SSID dedicated to Vocera badges (B1000 & B2000 b/g only)with WMM enabled. There are only 32 clients badges. Users are complaining of poor quality and dropped calls. I enabled voice real time analysis and I'm seeing jitter and dropped packets during calls.

We also have Ascom phones deployed on another SSID and no issues there whatsoever..so I'm thinking it's an issue with Vocera only.

Output of Real-Time Analysis is attached. Thanks




What does your firewall policy for the role for the Vocera badges look like? (show rights ). When you do a "show datapath session table " do you see that call's traffic being prioritized (H flag)?


Colin Joseph
Aruba Customer Engineering

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Contributor I

Re: Vocera issues - Poor call quality

Attached are both firewall policy and datapath outputs for Vocera. I do see the H flag during Vocera calls, not sure what the "I - Deep inspect" means but I will do some reading to find out more info.

Firewall policy is simple, with the Vocera service being allowed and queue set to high. I see that the badges communicate with the servers on the wired network and there's no QoS in place for the wired side...but plenty of BW. I don't think QoS on the wired side is the issue since we also have Ascom phones on the wireless also communicating with the Ascom server on the wired network without any call quality issues.
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