[VVX, API] Session Stats API returns "127" as MOS scores

Occasional Visitor

[VVX, API] Session Stats API returns "127" as MOS scores

I'm using session stats API to capture and study call quality for multiple calls but I'm observing multiple occurrences where the MOS value is returned as 127, which is invalid as it should be between 1 to 5.


API Reference can be found here - https://www.poly.com/content/dam/www/products/support/voice/vvx-business-media-phones/other/ucsoftwa...


API - {{DEVICE_URL}}/api/v1/mgmt/media/sessionStats

  "PacketsReceived": "335",
  "PacketsSent": "347",
  "TxMOSLQ": "4.1",
  "TxPayloadSize": "20",
  "Category": "0:Voice",
  "OctetsReceived": "53600",
  "MaxJitter": "0",
  "TxCodec": "0:G.711 µ-Law",
  "Jitter": "0",
  "TxMOSCQ": "4.1",
  "RxPayloadSize": "160",
  "PacketsLost": "0",
  "Latency": "0",
  "OctetsSent": "55520",
  "Ref": "0x4be35678",
  "RxMOSLQ": "127.0",
  "RxCodec": "0:G.711 µ-Law",
  "PacketsExpected": "335",
  "RxMOSCQ": "127.0"


Looking for an explanation why we get some MOS values as 127.



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Polycom Employee & Community Manager

Re: [VVX, API] Session Stats API returns "127" as MOS scores

Hello @poly-vvx ,


Welcome to the Poly Community.

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Steffen Baier


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Message 2 of 2