Outbound calls can be made to external customers using SmartAssist Voice Gateway (SAVG). The answering machine detection feature can be enabled on outbound calls to indicate whether a person or a machine has answered a call.

When the dialed call is answered, the answering machine detection feature starts listening to the outbound call, and after a short period, sends an indication of whether a person or a machine has answered the call.

This process happens in two parts:

1. The application triggers an Outbound Call.
2. Receiving Call Status Notifications.

1. Triggering the Outbound Call via API

The application triggers an outbound call using an HTTP POST request to the endpoint.

Method	POST
Endpoint	https://{{host}}/api/1.1/public/bot/{{botId}}/smartassist/dialout
Content Type	application/json
Authorization	auth: {{JWT}} See How to generate the JWT Token.
API Scope	SmartAssist Dialout

Path Parameters

Parameter	Description	Type
host	Environment URL, for example, https://smartassist.kore.ai	string, required

Query Parameters

PARAMETER	DESCRIPTION	TYPE
botId	botId or streamId. You can access it from the bot’s General Settings page.	string, required
target	URI of the target of the outbound call. For example: “tel:911234567890” with the country code “sip:1234567890@1.23.345.678:1234”	string, required
caller	User part for the caller ID of the outbound call. It is the experience flow number in smartAssist.	string, required
notifyurl	Absolute URL of the dialer application where SAVG sends notifications. If not provided, no notifications are sent.	string, optional
trunk	The trunk is a carrier for the account. If not provided, It will pick the default carrier for that account.	string, optional
metadata	Data to be sent to the bot (can be used to provide information to the bot about the call, such as the name of the target).	object, optional
timers	An object containing various timeout properties. Learn more.	object, optional
machinedetection	Activates machine (answering machine and fax) detection. Possible values: “disconnect”: Machine detection is enabled, and the call is disconnected in amd. “detect”: Machine detection is enabled, and the call is not disconnected in amd. “disabled”: Machine detection is not enabled.	string, optional
thresholdWordCount	Number of spoken words in a greeting that result in an amd_machine_detected result.	number, optional

Timers Configuration

PROPERTY	DESCRIPTION	REQUIRED
timers.noSpeechTimeoutMs	Time in milliseconds to wait for a speech before returning amd_no_speech_detected.	no, default=5000
timers.decisionTimeoutMs	Time in milliseconds to wait before returning amd_decision_timeout.	no, default=15000
timers.toneTimeoutMs	Time in milliseconds to wait to hear a tone.	no, default=20000
timers.greetingCompletionTimeoutMs	Silence in milliseconds to wait for during greeting before returning amd_machine_stopped_speaking.	no, default=2000
timers.noSpeechTimeoutMs	Time in milliseconds to wait for a speech before returning amd_no_speech_detected.	no, default=5000

Sample Request

curl --location --request POST '{{host}}/api/1.1/public/bot/{{botId}}/smartassist/dialout' \
--header 'Format: application/json' \
--header 'auth: {{JWT_TOKEN}}'
{
   "bot": "st-e38782ff-0d89-52e9-5678769a49fdexxxx",
   "target": "tel:911234567890",
   "caller": "+127061657882",
   "trunk": "TRUNK",
   "timers": {
       "noSpeechTimeoutMs": 12000,
       "decisionTimeoutMs": 15000,
       "toneTimeoutMs": 10000,
       "greetingCompletionTimeoutMs": 10000
   },
   "thresholdWordCount": 4,
   "machineDetection": "detect",
   "notifyurl": "https://de8a-115-114-88-222.ngrok-free.app/notify",
   "metadata": {
       "jobPosition": "Software Engineer",
       "userName": "John Doe",
       "companyName": "abc corporation",
       "jobLocation": "USA"
   }
}

Sample Response

{
"sid":"f9bd46ab-ecbd-4216-842e-0c58db3axxxx",
"callId":"2c01240f-6880-123c-179b-02d8f501xxxx"
}

2. Receiving Call Status Notifications

To receive call status notifications using the notifyUrl property on the dial-out request.

When this property is set, SAVG sends an HTTP POST request to the specified URL.

Sample Response

POST /notify HTTP/1.1
Host: 892c-115-114-88-222.ngrok-free.app
User-Agent: abc
{
"conversationId": "29e2d933-527e-429c-95b9-ba4f7c7bxxxx",
"reasonCode": "caller-disconnected",
"status": "completed",
"reason": "200 OK",
"duration": 14,
"machinedetection": "amd_human_detected",
"callconnecttime": "5/8/2023,11:32:49AM",
"callDisconnectTime": "5/8/2023,11:33:03AM"
},
POST /notify HTTP/1.1
Host: 892c-115-114-88-222.ngrok-free.app
User-Agent: abc
{
"conversationId": "29e2d933-527e-429c-95b9-ba4f7c7bxxxx",
"reasonCode": "SAVG-disconnected",
"status": "completed",
"reason": "200 OK",
"duration": 14,
"machinedetection": "amd_machine_detected",
"callconnecttime": "5/8/2023,11:32:49AM",
"callDisconnectTime": "5/8/2023,11:33:03AM"
},
POST /notify HTTP/1.1
Host: 892c-115-114-88-222.ngrok-free.app
User-Agent: abc
{
"conversationId": "4e010fea-cd93-47a0-a548-36d5f621xxxx",
"reasonCode": "caller-disconnected",
"status": "completed",
"reason": "200 OK",
"duration": 10,
"machinedetection": "disabled",
"callconnecttime": "5/8/2023,11:29:55AM",
"callDisconnectTime": "5/8/2023,11:30:05AM"
},
POST /notify HTTP/1.1
Host: 892c-115-114-88-222.ngrok-free.app
User-Agent: abc
{
"conversationId": "305ae3c4-b527-4bfd-ad75-9b6abdaaxxxx",
"status": "failed",
"reason": "503 Service Unavailable",
"machinedetection": "disconnect",
"callconnecttime": "5/8/2023,11:31:30AM",
"reasonCode": "Service Unavailable",
"callDisconnectTime": "5/8/2023,11:31:30AM"
},
POST /notify HTTP/1.1
Host: 892c-115-114-88-222.ngrok-free.app
User-Agent: abc
{
"conversationId": "80af8588-31c7-4877-a798-a3603c30xxxx",
"status": "failed",
"reason": "486 Busy Here",
"machinedetection": "disconnect",
"callconnecttime": "5/8/2023,11:36:33AM",
"reasonCode": "Busy Here",
"callDisconnectTime": "5/8/2023,11:36:33AM"
},
POST /notify HTTP/1.1
Host: 892c-115-114-88-222.ngrok-free.app
User-Agent: abc
{
"conversationId": "40a95de6-949a-4403-b735-233daxxxx",
"status": "failed",
"reason": "480 Temporarily Unavailable",
"machinedetection": "disconnect",
"callconnecttime": "5/8/2023,11:37:46AM",
"reasonCode": "Temporarily Unavailable",
"callDisconnectTime": "5/8/2023,11:37:46AM"
}

Response Body Parameters

PARAMETER	DESCRIPTION	TYPE
conversationId	UUID of the conversation (matches the conversationId sent in the dial-out trigger response).	string, required
status	Call status: “completed”: The call was completed (disconnected) after it was answered. “failed”: The call ended before it was answered. “answered”: When a call connection is established.	string, required
reasonCode	If the status is “failed”, it provides the reason for the failure: “Busy here”: The target number was busy. “Service Unavailable”: When the server is not available. “Temporarily Unavailable”: The end-user declined or rejected the call. If the status is “completed”, it provides the reason for the call end: “Caller-disconnected”: The call was disconnected from the end-user side. “Bot-disconnected”: The call was disconnected by the bot. “SAVG-disconnected”: The call was disconnected due to amd-error.	string, required
reason	Free text describing the reason for the failure (for example, the SIP Reason header).	string, required
callconnecttime	The time when the call was connected (when the end-user picked up the phone).	string, required
callDisconnecttime	The time when the call was disconnected.	string, required
duration	The duration of the call from connectTime to the end of the call in seconds.	string, required
machinedetection	This property is included when answering machine detection is enabled (machineDetection is configured to “disconnect”) and detected, and the call ends. It provides the detection reason: “amd_human_detected”: A human is speaking. “amd_machine_detected”: A machine is speaking. “amd_no_speech_detected”: No speech was detected. “amd_decision_timeout”: No decision was made in the time given. “amd_machine_stopped_speaking”: A machine has completed the greeting. “amd_tone_detected”: A beep was detected. “amd_error”: An error has occurred. “amd_stopped”: Answering machine detection was stopped.	string, required