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Azure Communication Services Voice Calling and Video Calling logs

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Azure Communication Services provides logging capabilities that you can use to monitor and debug your Communication Services solution. Configure these capabilities through the Azure portal.

The content in this article refers to logs enabled through Azure Monitor (see also FAQ). To enable these logs for Communication Services, see Enable logging in diagnostic settings.

Data concepts

The following high-level descriptions of data concepts are specific to Voice Calling and Video Calling. These concepts are important to review so that you can understand the meaning of the data captured in the logs.

Entities and IDs

Become familiar with the following terms:

  • Call: As represented in the data, a call is an abstraction depicted by correlationId. Values for correlationId are unique for each call, and are time-bound based on callStartTime and callDuration.

  • Participant: Represents the connection between an endpoint and the server. A participant (participantId) is present only when the call is a group call.

  • Endpoint: The most unique entity, represented by endpointId. Every call is an event that contains data from two or more endpoints. Endpoints represent the participants in the call.

    EndpointType tells you whether the endpoint is a human user (PSTN or VoIP), a bot, or the server that's managing multiple participants within a call. When an endpointType value is "Server", the endpoint isn't assigned a unique ID. You can analyze endpointType and the number of endpointId values to determine how many users and other nonhuman participants (bots and servers) join a call.

    Native SDKs for Android and iOS reuse the same endpointId value for a user across multiple calls, so you can get an understanding of experiences across sessions. This process differs from web-based endpoints, which always generate a new endpointId value for each new call.

  • Stream: The most granular entity. There's one stream for each direction (inbound or outbound) and mediaType value (for example, Audio or Video).

Data definitions

Usage log schema

Property Description
Timestamp The time stamp (UTC) when the log was generated.
Operation Name The operation associated with the log record.
Operation Version The api-version value associated with the operation, if the Operation Name operation was performed through an API. If no API corresponds to this operation, the version represents the version of the operation, in case the properties associated with the operation change in the future.
Category The log category of the event. The category is the granularity at which you can enable or disable logs on a resource. The properties that appear within the properties blob of an event are the same within a log category and resource type.
Correlation ID The ID for correlated events. You can use it to identify correlated events between multiple tables.
Properties Other data that's applicable to various modes of Communication Services.
Record ID The unique ID for a usage record.
Usage Type The mode of usage (for example, Chat, PSTN, or NAT).
Unit Type The type of unit that usage is based on for a mode of usage (for example, minutes, megabytes, or messages).
Quantity The number of units used or consumed for this record.

Call summary log schema

The call summary log contains data to help you identify key properties of all calls. A different call summary log is created for each participantId (or endpointId for peer-to-peer [P2P] calls) value in the call.

Important

Participant information in the call summary log varies based on the participant tenant. The SDK version and OS version are redacted if the participant is not within the same tenant (also called cross-tenant) as the Communication Services resource. Cross-tenant participants are classified as external users invited by a resource tenant to join and collaborate during a call.

Property Description
time The time stamp (UTC) when the log was generated.
operationName The operation associated with the log record.
operationVersion The api-version value associated with the operation, if the operationName operation was performed through an API. If no API corresponds to this operation, the version represents the version of the operation, in case the properties associated with the operation change in the future.
category The log category of the event. This property is the granularity at which you can enable or disable logs on a resource. The properties that appear within the properties blob of an event are the same within a log category and resource type.
correlationId The unique ID for a call. It identifies correlated events from all of the participants and endpoints that connect during a single call, and you can use it to join data from different logs. If you ever need to open a support case with Microsoft, you can use the correlationId value to easily identify the call that you're troubleshooting.
identifier The unique ID for the user. The identity can be an Azure Communication Services user, a Microsoft Entra user ID, a Teams anonymous user ID, or a Teams bot ID. You can use this ID to correlate user events across logs.
callStartTime A time stamp for the start of the call, based on the first attempted connection from any endpoint.
callDuration The duration of the call, expressed in seconds, based on the first attempted connection and the end of the last connection between two endpoints.
callType The type of the call. It contains either "P2P" or "Group". A "P2P" call is a direct 1:1 connection between only two, nonserver endpoints. A "Group" call is a call that has more than two endpoints or is created as "Group" call before the connection.
teamsThreadId The Teams thread ID. This ID is relevant only when the call is organized as a Teams meeting. It then represents the use case of interoperability between Microsoft Teams and Azure Communication Services.

This ID is exposed in operational logs. You can also get this ID through the Chat APIs.
participantId The ID generated to represent the two-way connection between a "Participant" endpoint (endpointType = "Server") and the server. When callType = "P2P", there's a direct connection between two endpoints, and no participantId value is generated.
participantStartTime The time stamp for the beginning of the participant's first connection attempt.
participantDuration The duration of each participant connection in seconds, from participantStartTime to the time stamp when the connection ended.
participantEndReason The reason for the end of a participant connection. It contains Calling SDK error codes that the SDK emits (when relevant) for each participantId value.
endpointId The unique ID that represents each endpoint connected to the call, where endpointType defines the endpoint type. When the value is null, the connected entity is the Communication Services server (endpointType = "Server").

The endpointId value can sometimes persist for the same user across multiple calls (correlationId) for native clients. The number of endpointId values determines the number of call summary logs. A distinct summary log is created for each endpointId value.
endpointType This value describes the properties of each endpoint connected to the call. It can contain "Server", "VOIP", "PSTN", "BOT", or "Unknown".
sdkVersion The version string for the Communication Services Calling SDK version that each relevant endpoint uses (for example, "1.1.00.20212500").
osVersion A string representing the operating system and version of each endpoint device.
participantTenantId The ID of the Microsoft tenant associated with the identity of the participant. The tenant can either be the Azure tenant that owns the Azure Communication Services resource or the Microsoft tenant of a Microsoft 365 identity. This field is used to guide cross-tenant redaction.
participantType Description of the participant as a combination of its client (Azure Communication Services or Teams), and its identity (Azure Communication Services or Microsoft 365). Possible values include: Azure Communication Services (Azure Communication Services identity and Azure Communication Services SDK), Teams (Teams identity and Teams client), Azure Communication Services as Teams external user (Azure Communication Services identity and Azure Communication Services SDK in Teams call or meeting), Azure Communication Services as Microsoft 365 user (Microsoft 365 identity and Azure Communication Services client), and Teams Voice Apps.
pstnPartcipantCallType Represents the type and direction of PSTN participants including Emergency calling, direct routing, transfer, forwarding, and so on.
ParticipantEndSubCode Represents the Calling SDK error subcode that the SDK emits (when relevant) for each participantId value.
ResultCategory Represents the category of the participant ending the call. It can be one of these 4 values: Success, ExpectedError, UnexpectedClientError, UnexpectedServerError.

Call diagnostic log schema

Call diagnostic logs provide important information about the endpoints and the media transfers for each participant. They also provide measurements that help you understand quality problems.

For each endpoint within a call, a distinct call diagnostic log is created for outbound media streams (audio or video, for example) between endpoints. In a P2P call, each log contains data that relates to each of the outbound streams associated with each endpoint. In group calls, participantId serves as a key identifier to join the related outbound logs into a distinct participant connection. Call diagnostic logs remain intact and are the same regardless of the participant tenant.

Note

In this article, P2P and group calls are within the same tenant, by default, for all call scenarios that are cross-tenant. They're specified accordingly throughout the article.

Property Description
operationName The operation associated with the log record.
operationVersion The api-version value associated with the operation, if the operationName operation was performed through an API. If no API corresponds to this operation, the version represents the version of the operation, in case the properties associated with the operation change in the future.
category The log category of the event. This property is the granularity at which you can enable or disable logs on a resource. The properties that appear within the properties blob of an event are the same within a log category and resource type.
correlationId The unique ID for a call. It identifies correlated events from all of the participants and endpoints that connect during a single call. If you ever need to open a support case with Microsoft, you can use the correlationId value to easily identify the call that you're troubleshooting.
participantId ID generated to represent the two-way connection between a "Participant" endpoint (endpointType = "Server") and the server. When callType = "P2P", there's a direct connection between two endpoints, and no participantId value is generated.
identifier The unique ID for the user. The identity can be an Azure Communication Services user, a Microsoft Entra user ID, a Teams object ID, or a Teams bot ID. You can use this ID to correlate user events across logs.
endpointId The unique ID that represents each endpoint connected to the call, where endpointType defines the endpoint type. When the value is null, the connected entity is the Communication Services server. EndpointId can persist for the same user across multiple calls (correlationId) for native clients but is unique for every call when the client is a web browser.
endpointType The value that describes the properties of each endpointId instance. It can contain "Server", "VOIP", "PSTN", "BOT", "Voicemail", "Anonymous", or "Unknown".
mediaType The string value that describes the type of media that's being transmitted between endpoints within each stream. Possible values include "Audio", "Video", "VBSS" (video-based screen sharing), and "AppSharing".
streamId A nonunique integer that, together with mediaType, you can use to uniquely identify streams of the same participantId value.
transportType The string value that describes the network transport protocol for each participantId value. It can contain "UDP", "TCP", or "Unrecognized". "Unrecognized" indicates that the system couldn't determine if the transport type was TCP or UDP.
roundTripTimeAvg The average time that it takes to get an IP packet from one endpoint to another within a participantDuration period. This network propagation delay is related to the physical distance between the two points, the speed of light, and any overhead that the various routers take in between.

The latency is measured as one-way time or round-trip time (RTT). Its value expressed in milliseconds. An RTT greater than 500 ms is negatively affecting the call quality.
roundTripTimeMax The maximum RTT (in milliseconds) measured fo reach media stream during a participantDuration period in a group call or during a callDuration period in a P2P call.
jitterAvg The average change in delay between successive packets. Azure Communication Services can adapt to some levels of jitter through buffering. When the jitter exceeds the buffering, which is approximately at a jitterAvg time greater than 30 ms, it can negatively affect quality. The packets arriving at different speeds cause a speaker's voice to sound robotic.

This metric is measured for each media stream over the participantDuration period in a group call or over the callDuration period in a P2P call.
jitterMax The maximum jitter value measured between packets for each media stream. Bursts in network conditions can cause problems in the audio/video traffic flow.
packetLossRateAvg The average percentage of packets that are lost. Packet loss directly affects audio quality. Small, individual lost packets have almost no impact, whereas back-to-back burst losses cause audio to cut out completely. The packets being dropped and not arriving at their intended destination cause gaps in the media. This situation results in missed syllables and words, along with choppy video and sharing.

A packet loss rate of greater than 10% (0.1) is likely having a negative quality impact. This metric is measured for each media stream over the participantDuration period in a group call or over the callDuration period in a P2P call.
packetLossRateMax This value represents the maximum packet loss rate (percentage) for each media stream over the participantDuration period in a group call or over the callDuration period in a P2P call. Bursts in network conditions can cause problems in the audio/video traffic flow.
JitterBufferSizeAvg The average size of jitter buffer over the duration of each media stream. A jitter buffer is a shared data area where voice packets can be collected, stored, and sent to the voice processor in evenly spaced intervals. Jitter buffer is used to counter the effects of jitter.

Jitter buffers can be either static or dynamic. Static jitter buffers are set to a fixed size, while dynamic jitter buffers can adjust their size based on network conditions. The goal of the jitter buffer is to provide a smooth and uninterrupted stream of audio and video data to the user.

In the web SDK, this JitterBufferSizeAvg is the average value of the jitterBufferDelay during the call. The jitterBufferDelay is the duration of an audio sample or a video frame that stays in the jitter buffer.

Normally when JitterBufferSizeAvg value is greater than 200 ms, it negatively impacts quality.
JitterBufferSizeMax The maximum jitter buffer size measured during the duration of each media stream.

Normally when this value is greater than 200 ms, it negatively impacts quality.
HealedDataRatioAvg The average percentage of lost or damaged data packets successfully reconstructed or recovered by the healer over the duration of audio stream. Healed data ratio is a measure of the effectiveness of error correction techniques used in VoIP systems.

When this value is greater than 0.1 (10%), we consider the stream as bad quality.
HealedDataRatioMax The maximum healed data ratio measured during the duration of each media stream.

When this value is greater than 0.1 (10%), we consider the stream as bad quality.
VideoFrameRateAvg The average number of video frames that are transmitted per second during a video/screensharing call. The video frame rate can impact the quality and smoothness of the video stream, with higher frame rates generally resulting in smoother and more fluid motion. The standard frame rate for WebRTC video is typically 30 frames per second (fps), although frame rate can vary depending on the specific implementation and network conditions.

The stream quality is considered poor when this value is less than 7 for video stream, or less than 1 for screen sharing stream.
RecvResolutionHeight The average of vertical size of the incoming video stream that is transmitted during a video/screensharing call. It's measured in pixels and is one of the factors that determines the overall resolution and quality of the video stream. The specific resolution used may depend on the capabilities of the devices and network conditions involved in the call.

The stream quality is considered poor when this value is less than 240 for video stream, or less than 768 for screen sharing stream.
RecvFreezeDurationPerMinuteInMs The average freeze duration in milliseconds per minute for incoming video/screensharing stream. Freezes are typically due to bad network condition and can degrade the stream quality.

The stream quality is considered poor when this value is greater than 6,000 ms for video stream, or greater than 25,000 ms for screen sharing stream.
PacketUtilization The packets sent or received for a given media stream.

Usually the longer the call, the higher the value is. If this value is zero, it could indicate that media is not flowing.
VideoBitRateAvg The average bitrate (bits per second) for a video or screenshare stream.

A low bitrate value could indicate poor network issue. The minimum bitrate (bandwidth) required can be found here: Network bandwidth.
VideoBitRateMax The maximum bitrate (bits per second) for a video or screenshare stream.

A low bitrate value could indicate poor network issue. The minimum bitrate (bandwidth) required can be found here: Network bandwidth.
StreamDirection The direction of the media stream. It is either Inbound or Outbound.
CodecName The name of the codec used for processing media streams. It can be OPUS, G722, H264S, SATIN, and so on.

Call client operations log schema

The call client operations log provides client-side information about the calling endpoints and participants involved in a call. These logs are currently in preview and show client events that occurred in a call and which actions a customer takes during a call.

This log provides detailed information on actions taken during a call and can be used to visualize and investigate call issues by using Call Diagnostics for your Azure Communication Services Resource. Learn more about Call Diagnostics

Property Description
CallClientTimeStamp The timestamp for when on operation occurred on the SDK in UTC.
OperationName The name of the operation triggered on the calling SDK.
CallId The unique ID for a call. It identifies correlated events from all of the participants and endpoints that connect during a single call, and you can use it to join data from different logs. It's similar to the correlationId in call summary log and call diagnostic log.
ParticipantId The unique identifier for each call leg (in Group calls) or call participant (in Peer to Peer calls). This ID is the main correlation point between CallSummary, CallDiagnostic, CallClientOperations, and CallClientMediaStats logs.
OperationType Call Client Operation.
OperationId A unique GGUID identifying an SDK operation.
DurationMs The time took by a Calling SDK operation to fail or succeed.
ResultType Field describing success or failure of an operation.
ResultSignature HTTP-like failure or success code (200, 500).
SdkVersion The version of Calling SDK being used.
UserAgent The standard user agent string based on the browser or the platform Calling SDK is used.
ClientInstanceId A unique GGUID identifying the CallClient object.
EndpointId The unique ID that represents each endpoint connected to the call, where endpointType defines the endpoint type. When the value is null, the connected entity is the Communication Services server (endpointType = "Server").

The endpointId value can sometimes persist for the same user across multiple calls (correlationId) for native clients. The number of endpointId values determines the number of call summary logs. A distinct summary log is created for each endpointId value.
OperationPayload A dynamic payload that varies based on the operation providing more operation specific details.

Call client media stats time series log schema

The call client media statistics time series log provides client-side information about the media streams between individual participants involved in a call. These logs are currently in limited preview and provide detailed time series data on the audio, video, and screen share media steams between participants with a default 10-seconds aggregation interval. The logs contain granular time series information about media stream type, direction, codec, and bitrate properties (for example, max, min, average).

This log provides more detailed information than the Call Diagnostic log to understand the quality of media steams between participants. It can be used to visualize and investigate quality issues for your calls through Call Diagnostics for your Azure Communication Services Resource. Learn more about Call Diagnostics

Property Description
OperationName The operation associated with the log record.
CallId The unique ID for a call. It identifies correlated events from all of the participants and endpoints that connect during a single call, and you can use it to join data from different logs. It's similar to the correlationId in call summary log and call diagnostic log.
CallClientTimeStamp The timestamp when the media stats is recorded.
MetricName The name of the media statistics, such as Bitrate, JitterInMs, PacketsPerSecond, and so on.
Count The number of data points sampled at a given timestamp.
Sum The sum of metric values of all the data points sampled.
Average The average metric value of the data points sampled. Average = Sum / Count.
Minimum The minimum of metric values of all the data points sampled.
Maximum The maximum of metric values of all the data points sampled.
MediaStreamDirection The direction of the media stream. It can be send or receive.
MediaStreamType The type of the media stream. It can be video, audio, or screen.
MediaStreamCodec The codec used to encode/decode the media stream, such as H264, OPUS, VP8, and so on.
ParticipantId The unique ID generated to represent each endpoint in the call.
ClientInstanceId The unique ID representing the Call Client object created in the calling SDK.
EndpointId The unique ID that represents each endpoint that is connected to the call. EndpointId can persist for the same user across multiple calls (callIds) for native clients but is unique for every call when the client is a web browser. The EndpointId isn't currently instrumented in this log. When implemented, it matches the values in CallSummary/Diagnostics logs
RemoteParticipantId The unique ID that represents the remote endpoint in the media stream. For example, a user can render multiple video streams for the other users in the same call. Each video stream has a different RemoteParticipantId.
RemoteEndpointId Same as EndpointId, but it represents the user on the remote side of the stream.
MediaStreamId A unique ID that represents each media stream in the call. MediaStreamId isn't currently instrumented in clients. When implemented, it matches the streamId column in CallDiagnostics logs.
AggregationIntervalSeconds The time interval for aggregating the media statistics. Currently in the Calling SDK, media metrics are sampled every 1 second, and when we report in the log we aggregate all samples every 10 seconds. So each row in this table has, at most, 10 sampling points.

P2P vs. group calls

There are two types of calls, as represented by callType:

  • Peer to Peer (P2P) call: A connection between only two endpoints, with no server endpoint. P2P calls are initiated as a call between those endpoints and aren't created as a group call event before the connection.

    Diagram showing a P2P call across two endpoints.

  • Group call: Any call that has more than two endpoints connected. Group calls include a server endpoint and the connection between each endpoint and the server. P2P calls that add another endpoint during the call cease to be P2P, and they become a group call. You can determine the timeline of when each endpoint joined the call by using the participantStartTime and participantDuration metrics.

    Diagram showing a group call across multiple endpoints.

Log structure

Azure Communication Services creates four types of logs:

  • Call summary logs: Contain basic information about the call, including all the relevant IDs, time stamps, endpoints, and SDK information. For each participant within a call, Communication Services creates a distinct call summary log.

    If someone rejoins a call, that participant has the same EndpointId value but a different ParticipantId value. That endpoint can then have two call summary logs.

  • Call diagnostic logs: Contain information about the stream, along with a set of metrics that indicate quality of experience measurements. For each EndpointId within a call (including the server), Azure Communication Services creates a distinct call diagnostic log for each media stream (audio or video, for example) between endpoints.

  • Call client operations logs: Contain detailed call client events. These log events are generated for each EndpointId in a call and the number of event logs generated depends on the operations the participant performed during the call.

  • Call client media statistics logs: Contain detailed media stream values. These logs are generated for each media stream in a call. For each EndpointId within a call (including the server), Azure Communication Services creates a distinct log for each media stream (audio or video, for example) between endpoints. The volume of data generated in each log depends on the duration of call and number of media steams in the call.

In a P2P call, each log contains data that relates to each of the outbound streams associated with each endpoint. In a group call, each stream associated with endpointType = "Server" creates a log that contains data for the inbound streams. All other streams create logs that contain data for the outbound streams for all nonserver endpoints. In group calls, use the participantId value as the key to join the related inbound and outbound logs into a distinct participant connection.

Example: P2P call

The following diagram represents two endpoints connected directly in a P2P call. In this example, Communication Services creates two call summary logs (one for each participantID value) and four call diagnostic logs (one for each media stream).

For Azure Communication Services call client participants, there are also a series of call client operations logs and call client media statistics time series logs. The exact number of these logs depend on what kind of SDK operations are called and call duration.

Diagram showing a P2P call within the same tenant.

Example: Group call

The following diagram represents a group call example with three participantId values (which means three participants) and a server endpoint. Multiple values for endpointId can potentially appear in multiple participants--for example, when they rejoin a call from the same device. Communication Services creates one call summary log for each participantId value. It creates four call diagnostic logs: one for each media stream per participantId.

For Azure Communication Services call client participants, the call client operations logs are the same as P2P calls. For each participant using calling SDK, there are a series of call client operations logs.

For Azure Communication Services call client participants, the call client operations logs and call client media statistics time series logs are the same as P2P calls. For each participant using calling SDK, there are a series of call client operations logs and call client media statistics time series logs.

Diagram showing a group call within the same tenant.

Example: Cross-tenant P2P call

The following diagram represents two participants across multiple tenants that are connected directly in a P2P call. In this example, Communication Services creates one call summary log (one for each participant) with redacted OS and SDK versions. Communication Services also creates four call diagnostic logs (one for each media stream). Each log contains data that relates to the outbound stream of participantID.

Diagram showing a cross-tenant P2P call.

Example: Cross-tenant group call

The following diagram represents a group call example with three participantId values across multiple tenants. Communication Services creates one call summary log for each participant with redacted OS and SDK versions. Communication Services also creates four call diagnostic logs that relate to each participantId value (one for each media stream).

Diagram showing a cross-tenant group call.

Note

This release supports only outbound diagnostic logs. OS and SDK versions associated with the bot and the participant can be redacted because Communication Services treats identities of participants and bots the same way.

Sample data

P2P call

Here are shared fields for all logs in a P2P call:

"time":                     "2021-07-19T18:46:50.188Z",
"resourceId":               "SUBSCRIPTIONS/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX/RESOURCEGROUPS/ACS-TEST-RG/PROVIDERS/MICROSOFT.COMMUNICATION/COMMUNICATIONSERVICES/ACS-PROD-CCTS-TESTS",
"correlationId":            "aaaa0000-bb11-2222-33cc-444444dddddd",

Call summary logs

Call summary logs share operation and category information:

"operationName":            "CallSummary",
"operationVersion":         "1.0",
"category":                 "CallSummary",

Here's a call summary for VoIP user 1:

"properties": {
    "identifier":               "acs:61fddbe3-0003-4066-97bc-6aaf143bbb84_0000000b-4fee-66cf-ac00-343a0d003158",
    "callStartTime":            "2021-07-19T17:54:05.113Z",
    "callDuration":             6,
    "callType":                 "P2P",
    "teamsThreadId":            "null",
    "participantId":            "null",    
    "participantStartTime":     "2021-07-19T17:54:06.758Z",
    "participantDuration":      "5",
    "participantEndReason":     "0",
    "endpointId":               "570ea078-74e9-4430-9c67-464ba1fa5859",
    "endpointType":             "VoIP",
    "sdkVersion":               "1.0.1.0",
    "osVersion":                "Windows 10.0.17763 Arch: x64"
}

Here's a call summary for VoIP user 2:

"properties": {
    "identifier":               "acs:7af14122-9ac7-4b81-80a8-4bf3582b42d0_06f9276d-8efe-4bdd-8c22-ebc5434903f0",
    "callStartTime":            "2021-07-19T17:54:05.335Z",
    "callDuration":             6,
    "callType":                 "P2P",
    "teamsThreadId":            "null",
    "participantId":            "null",
    "participantStartTime":     "2021-07-19T17:54:06.335Z",
    "participantDuration":      "5",
    "participantEndReason":     "0",
    "endpointId":               "a5bd82f9-ac38-4f4a-a0fa-bb3467cdcc64",
    "endpointType":             "VoIP",
    "sdkVersion":               "1.1.0.0",
    "osVersion":                "null"
}

Here's a cross-tenant call summary log for VoIP user 1:

"properties": {
    "identifier":               "1e4c59e1-r1rr-49bc-893d-990dsds8f9f5",
    "callStartTime":            "2022-08-14T06:18:27.010Z",
    "callDuration":             520,
    "callType":                 "P2P",
    "teamsThreadId":            "null",
    "participantId":            "null",
    "participantTenantId":      "02cbdb3c-155a-4b95-b829-6d56a45787ca",
    "participantStartTime":     "2022-08-14T06:18:27.010Z",
    "participantDuration":      "520",
    "participantEndReason":     "0",
    "endpointId":               "02cbdb3c-155a-4d98-b829-aaaaa61d44ea",
    "endpointType":             "VoIP",
    "sdkVersion":               "Redacted",
    "osVersion":                "Redacted"
}

Here's a call summary for a PSTN call:

Note

P2P or group call logs have OS and SDK versions redacted regardless of whether it's the participant's tenant or the bot's tenant.

"properties": {
    "identifier": "b1999c3e-bbbb-4650-9b23-9999bdabab47",
    "callStartTime": "2022-08-07T13:53:12Z",
    "callDuration": 1470,
    "callType": "Group",
    "teamsThreadId": "19:36ec5177126fff000aaa521670c804a3@thread.v2",
    "participantId": " b25cf111-73df-4e0a-a888-640000abe34d",
    "participantStartTime": "2022-08-07T13:56:45Z",
    "participantDuration": 960,
    "participantEndReason": "0",
    "endpointId": "8731d003-6c1e-4808-8159-effff000aaa2",
    "endpointType": "PSTN",
    "sdkVersion": "Redacted",
    "osVersion": "Redacted"
}

Call diagnostic logs

Call diagnostic logs share operation information:

"operationName":            "CallDiagnostics",
"operationVersion":         "1.0",
"category":                 "CallDiagnostics",

Here's a diagnostic log for an audio stream from VoIP endpoint 1 to VoIP endpoint 2:

"properties": {
    "identifier":           "acs:61fddbe3-0003-4066-97bc-6aaf143bbb84_0000000b-4fee-66cf-ac00-343a0d003158",
    "participantId":        "null",
    "endpointId":           "570ea078-74e9-4430-9c67-464ba1fa5859",
    "endpointType":         "VoIP",
    "mediaType":            "Audio",
    "streamId":             "1000",
    "transportType":        "UDP",
    "roundTripTimeAvg":     "82",
    "roundTripTimeMax":     "88",
    "jitterAvg":            "1",
    "jitterMax":            "1",
    "packetLossRateAvg":    "0",
    "packetLossRateMax":    "0"
}

Here's a diagnostic log for an audio stream from VoIP endpoint 2 to VoIP endpoint 1:

"properties": {
    "identifier":           "acs:7af14122-9ac7-4b81-80a8-4bf3582b42d0_06f9276d-8efe-4bdd-8c22-ebc5434903f0",
    "participantId":        "null",
    "endpointId":           "a5bd82f9-ac38-4f4a-a0fa-bb3467cdcc64",
    "endpointType":         "VoIP",
    "mediaType":            "Audio",
    "streamId":             "1363841599",
    "transportType":        "UDP",
    "roundTripTimeAvg":     "78",
    "roundTripTimeMax":     "84",
    "jitterAvg":            "1",
    "jitterMax":            "1",
    "packetLossRateAvg":    "0",
    "packetLossRateMax":    "0"
}

Here's a diagnostic log for a video stream from VoIP endpoint 1 to VoIP endpoint 2:

"properties": {
    "identifier":           "acs:61fddbe3-0003-4066-97bc-6aaf143bbb84_0000000b-4fee-66cf-ac00-343a0d003158",
    "participantId":        "null",
    "endpointId":           "570ea078-74e9-4430-9c67-464ba1fa5859",
    "endpointType":         "VoIP",
    "mediaType":            "Video",
    "streamId":             "2804",
    "transportType":        "UDP",
    "roundTripTimeAvg":     "103",
    "roundTripTimeMax":     "143",
    "jitterAvg":            "0",
    "jitterMax":            "4",
    "packetLossRateAvg":    "3.146336E-05",
    "packetLossRateMax":    "0.001769911"
}

Group call

Data for a group call is generated in three call summary logs and six call diagnostic logs. Here are shared fields for all logs in the call:

"time":                     "2021-07-05T06:30:06.402Z",
"resourceId":               "SUBSCRIPTIONS/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX/RESOURCEGROUPS/ACS-TEST-RG/PROVIDERS/MICROSOFT.COMMUNICATION/COMMUNICATIONSERVICES/ACS-PROD-CCTS-TESTS",
"correlationId":            "bbbb1111-cc22-3333-44dd-555555eeeeee",

Call summary logs

Call summary logs share operation and category information:

"operationName":            "CallSummary",
"operationVersion":         "1.0",
"category":                 "CallSummary",

Here's a call summary for VoIP endpoint 1:

"properties": {
    "identifier":               "acs:1797dbb3-f982-47b0-b98e-6a76084454f1_0000000b-1531-729f-ac00-343a0d00d975",
    "callStartTime":            "2021-07-05T06:16:40.240Z",
    "callDuration":             87,
    "callType":                 "Group",
    "teamsThreadId":            "19:meeting_MjZiOTAyN2YtZWU1Yi00ZTZiLT77777OOOOO99999jgxOTkw@thread.v2",
    "participantId":            "04cc26f5-a86d-481c-b9f9-7a40be4d6fba",
    "participantStartTime":     "2021-07-05T06:16:44.235Z",
    "participantDuration":      "82",
    "participantEndReason":     "0",
    "endpointId":               "5ebd55df-ffff-ffff-89e6-4f3f0453b1a6",
    "endpointType":             "VoIP",
    "sdkVersion":               "1.0.0.3",
    "osVersion":                "Darwin Kernel Version 18.7.0: Mon Nov 9 15:07:15 PST 2020; root:xnu-4903.272.3~3/RELEASE_ARM64_S5L8960X"
}

Here's a call summary for VoIP endpoint 3:

"properties": {
    "identifier":               "acs:1797dbb3-f982-47b0-b98e-6a76084454f1_0000000b-1531-57c6-ac00-343a0d00d972",
    "callStartTime":            "2021-07-05T06:16:40.240Z",
    "callDuration":             87,
    "callType":                 "Group",
    "teamsThreadId":            "19:meeting_MjZiOTAyN2YtZWU1Yi00ZTZiLTk2ZDUtYTZlM2I2ZjgxOTkw@thread.v2",
    "participantId":            "1a9cb3d1-7898-4063-b3d2-26c1630ecf03",
    "participantStartTime":     "2021-07-05T06:16:40.240Z",
    "participantDuration":      "87",
    "participantEndReason":     "0",
    "endpointId":               "5ebd55df-ffff-ffff-ab89-19ff584890b7",
    "endpointType":             "VoIP",
    "sdkVersion":               "1.0.0.3",
    "osVersion":                "Android 11.0; Manufacturer: Google; Product: redfin; Model: Pixel 5; Hardware: redfin"
}

Here's a call summary for PSTN endpoint 2:

"properties": {
    "identifier":               "null",
    "callStartTime":            "2021-07-05T06:16:40.240Z",
    "callDuration":             87,
    "callType":                 "Group",
    "teamsThreadId":            "19:meeting_MjZiOTAyN2YtZWU1Yi00ZTZiLT77777OOOOO99999jgxOTkw@thread.v2",
    "participantId":            "515650f7-8204-4079-ac9d-d8f4bf07b04c",
    "participantStartTime":     "2021-07-05T06:17:10.447Z",
    "participantDuration":      "52",
    "participantEndReason":     "0",
    "endpointId":               "46387150-692a-47be-8c9d-1237efe6c48b",
    "endpointType":             "PSTN",
    "sdkVersion":               "null",
    "osVersion":                "null"
}

Here's a cross-tenant call summary log:

"properties": {
    "identifier":               "1e4c59e1-r1rr-49bc-893d-990dsds8f9f5",
    "callStartTime":            "2022-08-14T06:18:27.010Z",
    "callDuration":             912,
    "callType":                 "Group",
    "teamsThreadId":            "19:meeting_MjZiOTAyN2YtZWU1Yi00ZTZiLT77777OOOOO99999jgxOTkw@thread.v2",
    "participantId":            "aa1dd7da-5922-4bb1-a4fa-e350a111fd9c",
    "participantTenantId":      "02cbdb3c-155a-4b95-b829-6d56a45787ca",
    "participantStartTime":     "2022-08-14T06:18:27.010Z",
    "participantDuration":      "902",
    "participantEndReason":     "0",
    "endpointId":               "02cbdb3c-155a-4d98-b829-aaaaa61d44ea",
    "endpointType":             "VoIP",
    "sdkVersion":               "Redacted",
    "osVersion":                "Redacted"
}

Here's a cross-tenant call summary log with a bot as a participant:


"properties": {
    "identifier":             "b1902c3e-b9f7-4650-9b23-9999bdabab47",
    "callStartTime":          "2022-08-09T16:00:32Z",
    "callDuration":            1470,
    "callType":               "Group",
    "teamsThreadId":         "19:meeting_MmQwZDcwYTQtZ000HWE6NzI4LTg1YTAtNXXXXX99999ZZZZZ@thread.v2",
    "participantId":           "66e9d9a7-a434-4663-d91d-fb1ea73ff31e",
    "participantStartTime":    "2022-08-09T16:14:18Z",
    "participantDuration":      644,
    "participantEndReason":    "0",
    "endpointId":             "69680ec2-5ac0-4a3c-9574-eaaa77720b82",
    "endpointType":           "Bot",
    "sdkVersion":             "Redacted",
    "osVersion":              "Redacted"
}

Call diagnostic logs

Call diagnostic logs share operation information:

"operationName":            "CallDiagnostics",
"operationVersion":         "1.0",
"category":                 "CallDiagnostics",

Here's a diagnostic log for an audio stream from VoIP endpoint 1 to a server endpoint:

"properties": {
    "identifier":           "acs:1797dbb3-f982-47b0-b98e-6a76084454f1_0000000b-1531-729f-ac00-343a0d00d975",
    "participantId":        "04cc26f5-a86d-481c-b9f9-7a40be4d6fba",
    "endpointId":           "5ebd55df-ffff-ffff-89e6-4f3f0453b1a6",
    "endpointType":         "VoIP",
    "mediaType":            "Audio",
    "streamId":             "14884",
    "transportType":        "UDP",
    "roundTripTimeAvg":     "46",
    "roundTripTimeMax":     "48",
    "jitterAvg":            "0",
    "jitterMax":            "1",
    "packetLossRateAvg":    "0",
    "packetLossRateMax":    "0"
}

Here's a diagnostic log for an audio stream from a server endpoint to VoIP endpoint 1:

"properties": {
    "identifier":           null,
    "participantId":        "04cc26f5-a86d-481c-b9f9-7a40be4d6fba",
    "endpointId":           null,
    "endpointType":         "Server",
    "mediaType":            "Audio",
    "streamId":             "2001",
    "transportType":        "UDP",
    "roundTripTimeAvg":     "42",
    "roundTripTimeMax":     "44",
    "jitterAvg":            "1",
    "jitterMax":            "1",
    "packetLossRateAvg":    "0",
    "packetLossRateMax":    "0"
}

Here's a diagnostic log for an audio stream from VoIP endpoint 3 to a server endpoint:

"properties": {
    "identifier":           "acs:1797dbb3-f982-47b0-b98e-6a76084454f1_0000000b-1531-57c6-ac00-343a0d00d972",
    "participantId":        "1a9cb3d1-7898-4063-b3d2-26c1630ecf03",
    "endpointId":           "5ebd55df-ffff-ffff-ab89-19ff584890b7",
    "endpointType":         "VoIP",
    "mediaType":            "Audio",
    "streamId":             "13783",
    "transportType":        "UDP",
    "roundTripTimeAvg":     "45",
    "roundTripTimeMax":     "46",
    "jitterAvg":            "1",
    "jitterMax":            "2",
    "packetLossRateAvg":    "0",
    "packetLossRateMax":    "0"
}

Here's a diagnostic log for an audio stream from a server endpoint to VoIP endpoint 3:

"properties": {
    "identifier":           "null",
    "participantId":        "1a9cb3d1-7898-4063-b3d2-26c1630ecf03",
    "endpointId":           null,
    "endpointType":         "Server"    
    "mediaType":            "Audio",
    "streamId":             "1000",
    "transportType":        "UDP",
    "roundTripTimeAvg":     "45",
    "roundTripTimeMax":     "46",
    "jitterAvg":            "1",
    "jitterMax":            "4",
    "packetLossRateAvg":    "0",

Call client operations log and call client media statistics logs for P2P and group calls

For call client operations log and call client media stats time series log, there's no difference between P2P and group call scenarios and the number of logs depends on the SDK operations and call duration. The following code is a generic sample showing the schema of these logs.

Call client operations log

Here's a call client operations log for "CreateView" operation:

"properties": {
    "TenantId":               "aaaabbbb-0000-cccc-1111-dddd2222eeee",
    "TimeGenerated":          "2024-01-09T17:06:50.3Z",
    "CallClientTimeStamp":    "2024-01-09T15:07:56.066Z",
    "OperationName":          "CreateView" ,   
    "CallId":                 "92d800c4-abde-40be-91e9-3814ee786b19",
    "ParticipantId":          "2656fd6c-6d4a-451d-a1a5-ce1baefc4d5c",
    "OperationType":          "client-api-request",
    "OperationId":            "0d987336-37e0-4acc-aba3-e48741d88103",
    "DurationMs":             "577",
    "ResultType":             "Succeeded",
    "ResultSignature":        "200",
    "SdkVersion":             "1.19.2.2_beta",
    "UserAgent":              "azure-communication-services/1.3.1-beta.1 azsdk-js-communication-calling/1.19.2-beta.2 (javascript_calling_sdk;#clientTag:904f667c-5f25-4729-9ee8-6968b0eaa40b). Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
    "ClientInstanceId":       "d08a3d05-db90-415f-88a7-87ae74edc1dd",
    "OperationPayload":       "{"StreamType":"Video","StreamId":"2.0","Source":"remote","RemoteParticipantId":"remote"}",
    "Type":                   "ACSCallClientOperations"
}

Each participant can have many different metrics for a call. You can run the following query in Log Analytics in the Azure portal to list all the possible Operations in the call client operations log:

ACSCallClientOperations | distinct OperationName

Call client media statistics time series log

Here's an example of media statistics time series log. It shows the participant's Jitter metric for receiving an audio stream at a specific timestamp.

"properties": {
    "TenantId":                     "aaaabbbb-0000-cccc-1111-dddd2222eeee",
    "TimeGenerated":                "2024-01-10T07:36:51.771Z",
    "OperationName":                "CallClientMediaStatsTimeSeries" ,  
    "CallId":                       "92d800c4-abde-40be-91e9-3814ee786b19", 
    "CallClientTimeStamp":          "2024-01-09T15:07:56.066Z",
    "MetricName":                   "JitterInMs",
    "Count":                        "2",
    "Sum":                          "34",
    "Average":                      "17",
    "Minimum":                      "10",
    "Maximum":                      "25",
    "MediaStreamDirection":         "recv",
    "MediaStreamType":              "audio",
    "MediaStreamCodec":             "OPUS",
    "ParticipantId":                "2656fd6c-6d4a-451d-a1a5-ce1baefc4d5c",
     "ClientInstanceId":            "d08a3d05-db90-415f-88a7-87ae74edc1dd",
    "AggregationIntervalSeconds":   "10",
    "Type":                         "ACSCallClientMediaStatsTimeSeries"
}

Each participant can have many different media statistics metrics for a call. The following query can be run in Log Analytics in Azure portal to show all possible metrics in this log:

ACSCallClientMediaStatsTimeSeries | distinct MetricName

Error codes

The participantEndReason property contains a value from the set of Calling SDK error codes. You can refer to these codes to troubleshoot issues during the call, for each endpoint. See Troubleshooting call end response codes for Calling SDK, Call Automation SDK, PSTN, Chat SDK, and SMS SDK.

Next steps