Receiving an inbound call using the Amazon Chime SDK PSTN audio service

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Receiving an inbound call using the Amazon Chime SDK PSTN audio service - Amazon Chime SDK

When a NEW_INCOMING_CALL event occurs, the Audio Service creates a unique TransactionID and unique CallID that persist until the HANGUP event occurs.

You can respond in several ways to a NEW_INCOMING_CALL event. For example:

Send PlayAudio or RecordAudio actions and automatically answer the call.
Send a Pause action.
Send a Hangup action, in which case the call isn’t answered and the customer isn’t charged.
Send a CallAndBridge action and add another user to the call.
Do nothing, the call attempt times out after 30 seconds.

When a new inbound call is received, the SIP media application invokes an AWS Lambda function with this payload.


{
    "SchemaVersion": "1.0",
    "Sequence": 2,
    "InvocationEventType": "NEW_INBOUND_CALL"
    "CallDetails": {
        "TransactionId": "transaction-id",
        "AwsAccountId": "aws-account-id",
        "AwsRegion": "us-east-1",
        "SipRuleId": "sip-rule-id",
        "SipApplicationId": "sip-application-id",
        "Participants": [
            {
                "CallId": "call-id-1",
                "ParticipantTag": "LEG-A",
                "To": "+12065551212",
                "From": "+15105550101",
                "Direction": "Inbound",
                "StartTimeInMilliseconds": "159700958834234",
                "Status": "Connected"
            }
        ]
    }
}