Conversation mediaEndpointStats

[Craig_Reading]

Hi,

I am trying understand mediaEndpointStats for Customer and Agent participants. My assumption used to be that the mediaEndpointStats where always RX stats which is why on Customer participants there are stats for each leg. For example:

"mediaEndpointStats": [
{
"codecs": [
"audio/opus"
],
"eventTime": "2024-09-09T14:41:27.476Z",
"maxLatencyMs": 30,
"minMos": 4.882416278171334,
"minRFactor": 92.44390869140625,
"receivedPackets": 1039
},
{
"codecs": [
"audio/opus"
],
"eventTime": "2024-09-09T14:42:34.737Z",
"maxLatencyMs": 30,
"minMos": 4.882598281276358,
"minRFactor": 92.45185852050781,
"receivedPackets": 3358
},
{
"codecs": [
"audio/PCMU"
],
"discardedPackets": 21,
"eventTime": "2024-09-09T14:46:16.173Z",
"maxLatencyMs": 30,
"minMos": 4.379642247192193,
"minRFactor": 91.75749206542969,
"receivedPackets": 15427
},
{
"codecs": [
"audio/opus"
],
"discardedPackets": 1,
"eventTime": "2024-09-09T14:46:16.223Z",
"maxLatencyMs": 36,
"minMos": 4.879845254141609,
"minRFactor": 92.33213806152344,
"receivedPackets": 11075
}
],

However why are there mediaEndpointStats for PCMU and opus at the same time which correlates with the end of the Customer call when last (agent leg) disconnects?

Also when I look at the agent participant I see 2 sets of stats both for Opus?

          "mediaEndpointStats": [
            {
              "codecs": [
                "audio/opus"
              ],
              "eventTime": "2024-09-09T14:46:16.359Z",
              "maxLatencyMs": 39,
              "minMos": 4.888467877729231,
              "minRFactor": 92.71100616455078,
              "receivedPackets": 11079
            },
            {
              "codecs": [
                "audio/opus"
              ],
              "discardedPackets": 1,
              "eventTime": "2024-09-09T14:46:16.507Z",
              "maxLatencyMs": 32,
              "minMos": 4.880947146237666,
              "minRFactor": 92.37992095947266,
              "receivedPackets": 11088
            }
          ],

In summary:

1. Are mediaEndpointStats always RX stats?
2. What are the PCMU stats on Customer for?
3. What are there 2 sets on stats for a simple transfer from ACD queue to Agent?

Regards
Craig