Trouble Creating INCOMING Channel in ARI WebSocket with Stasis Application

mr_greno · August 22, 2025, 8:44am

Hi,

I am attempting to create an ARI WebSocket server with a WebSocket client for media. I found this example and tried to replicate it. The main difference is in the WebSocket connection: the example connects to Asterisk, while in my case, Asterisk is connecting to my server. However, the behavior is different, and it’s not working as expected.

Here’s what I’ve observed:

The StasisStart event is almost identical in both examples, except for the “application” attribute:

// Example:
"application": "dev_robo"

// My app:
"application": "dev_robo:PJSIP/virtualisk-00000001"

I proceed to create an INCOMING channel, but in my request, I set the “app” attribute from StasisStart instead of using my Stasis app name.

When sending the request to create a new channel (POST /channels/create), the example only returns a RESTResponse, whereas my app returns both a Dial event followed by the RESTResponse. The response also differs in the dialplan:

// Example:
"dialplan": {
    "context": "default",
    "exten": "s",
    "priority": 1,
    "app_name": "",
    "app_data": ""
}

// My app:
"dialplan": {
    "context": "default",
    "exten": "s",
    "priority": 1,
    "app_name": "AppDial2",
    "app_data": "(Outgoing Line)"
}

When attempting to dial the newly created channel, it crashes every time with the error:
409 Conflict: Channel not in Stasis application.

Here are the requests:

// Example:
{
    "type": "RESTRequest",
    "request_id": "ee88bbd3-de26-4a0b-abe4-a6bf051731e2",
    "method": "POST",
    "uri": "channels/1755843534.1/dial?caller=1755843534.0&timeout=5"
}

// My app:
{
    "type": "RESTRequest",
    "request_id": "f8d24f0134c635b86db95e0fd89af5cd",
    "method": "POST",
    "uri": "channels/1755849543.1/dial",
    "content_type": "application/json",
    "message_body": "{\"caller\":\"1755849542.0\"}"
}

The Asterisk configuration is the same in both cases.

Am I doing something wrong here? How can I create an INCOMING channel that is associated with the Stasis application?

Below is the full log of events and requests:

Example

{
    "type": "StasisStart",
    "timestamp": "2025-08-22T06:18:54.514+0000",
    "args":
    [
        "incoming"
    ],
    "channel":
    {
        "id": "1755843534.0",
        "name": "PJSIP/virtualisk-00000000",
        "state": "Ring",
        "protocol_id": "0795347746b1b67a34b41d230e3db6eb@192.168.8.10:5060",
        "caller":
        {
            "name": "Dev",
            "number": "176"
        },
        "connected":
        {
            "name": "",
            "number": ""
        },
        "accountcode": "",
        "dialplan":
        {
            "context": "from-virtualisk",
            "exten": "dev_5010",
            "priority": 2,
            "app_name": "Stasis",
            "app_data": "dev_robo,incoming"
        },
        "creationtime": "2025-08-22T06:18:54.513+0000",
        "language": "en",
        "channelvars":
        {
            "MEDIA_WEBSOCKET_CONNECTION_ID": "",
            "MEDIA_WEBSOCKET_OPTIMAL_FRAME_SIZE": ""
        }
    },
    "asterisk_id": "92:00:06:45:50:b0",
    "application": "dev_robo"
}
{
    "type": "RESTRequest",
    "request_id": "1512fbc5-e929-412e-83ee-d881b47343a3",
    "method": "POST",
    "uri": "channels/create",
    "query_strings":
    [
        {
            "name": "endpoint",
            "value": "WebSocket/INCOMING/c(ulaw)"
        },
        {
            "name": "app",
            "value": "dev_robo"
        },
        {
            "name": "appArgs",
            "value": "websocket"
        },
        {
            "name": "originator",
            "value": "1755843534.0"
        }
    ]
}
{
    "type": "RESTResponse",
    "transaction_id": "",
    "request_id": "1512fbc5-e929-412e-83ee-d881b47343a3",
    "status_code": 200,
    "reason_phrase": "OK",
    "uri": "channels/create",
    "content_type": "application/json",
    "message_body":
    {
        "id": "1755843534.1",
        "name": "WebSocket/INCOMING/0x7f68e4017250",
        "state": "Down",
        "protocol_id": "",
        "caller":
        {
            "name": "",
            "number": ""
        },
        "connected":
        {
            "name": "",
            "number": ""
        },
        "accountcode": "",
        "dialplan":
        {
            "context": "default",
            "exten": "s",
            "priority": 1,
            "app_name": "",
            "app_data": ""
        },
        "creationtime": "2025-08-22T06:18:54.515+0000",
        "language": "en",
        "channelvars":
        {
            "MEDIA_WEBSOCKET_CONNECTION_ID": "",
            "MEDIA_WEBSOCKET_OPTIMAL_FRAME_SIZE": ""
        }
    },
    "application": "dev_robo",
    "timestamp": "2025-08-22T06:18:54.516+0000",
    "asterisk_id": "92:00:06:45:50:b0"
}
{
    "type": "RESTRequest",
    "request_id": "ee88bbd3-de26-4a0b-abe4-a6bf051731e2",
    "method": "POST",
    "uri": "channels/1755843534.1/dial?caller=1755843534.0&timeout=5"
}
... other events which I don't have because of crash
{
    "type": "RESTResponse",
    "transaction_id": "",
    "request_id": "ee88bbd3-de26-4a0b-abe4-a6bf051731e2",
    "status_code": 204,
    "reason_phrase": "No Content",
    "uri": "channels/1755843534.1/dial",
    "application": "dev_robo",
    "timestamp": "2025-08-22T06:18:54.519+0000",
    "asterisk_id": "92:00:06:45:50:b0"
}

My app

{
    "type": "StasisStart",
    "timestamp": "2025-08-22T07:59:03.090+0000",
    "args": [
        "incoming"
    ],
    "channel": {
        "id": "1755849542.0",
        "name": "PJSIP\/virtualisk-00000000",
        "state": "Ring",
        "protocol_id": "46ce68354a919999669ff2fc26a5bceb@192.168.8.10:5060",
        "caller": {
            "name": "Dev",
            "number": "176"
        },
        "connected": {
            "name": "",
            "number": ""
        },
        "accountcode": "",
        "dialplan": {
            "context": "from-virtualisk",
            "exten": "dev_5010",
            "priority": 2,
            "app_name": "Stasis",
            "app_data": "dev_robo,incoming"
        },
        "creationtime": "2025-08-22T07:59:02.587+0000",
        "language": "en",
        "channelvars": {
            "MEDIA_WEBSOCKET_CONNECTION_ID": "",
            "MEDIA_WEBSOCKET_OPTIMAL_FRAME_SIZE": ""
        }
    },
    "asterisk_id": "92:00:06:45:50:b0",
    "application": "dev_robo:PJSIP\/virtualisk-00000000"
}
{
    "type": "RESTRequest",
    "request_id": "f6f2f83604328c47f8fe53c2534941e5",
    "method": "POST",
    "uri": "channels",
    "content_type": "application\/json",
    "message_body": "{\"app\":\"dev_robo:PJSIP\\\/virtualisk-00000000\",\"originator\":\"1755849542.0\",\"endpoint\":\"WebSocket\\\/INCOMING\\\/c(slin16)\"}"
}
{
    "type": "Dial",
    "timestamp": "2025-08-22T07:59:03.094+0000",
    "dialstatus": "",
    "forward": "",
    "dialstring": "INCOMING\/c(slin16)",
    "peer": {
        "id": "1755849543.1",
        "name": "WebSocket\/INCOMING\/0x7f704c014640",
        "state": "Down",
        "protocol_id": "",
        "caller": {
            "name": "",
            "number": ""
        },
        "connected": {
            "name": "Dev",
            "number": "176"
        },
        "accountcode": "",
        "dialplan": {
            "context": "default",
            "exten": "s",
            "priority": 1,
            "app_name": "AppDial2",
            "app_data": "(Outgoing Line)"
        },
        "creationtime": "2025-08-22T07:59:03.093+0000",
        "language": "en",
        "channelvars": {
            "MEDIA_WEBSOCKET_CONNECTION_ID": "a6778a50-c199-4f90-9d72-e8f4df1948d3",
            "MEDIA_WEBSOCKET_OPTIMAL_FRAME_SIZE": "640"
        }
    },
    "asterisk_id": "92:00:06:45:50:b0",
    "application": "dev_robo:PJSIP\/virtualisk-00000000"
}
{
    "type": "RESTResponse",
    "transaction_id": "",
    "request_id": "f6f2f83604328c47f8fe53c2534941e5",
    "status_code": 200,
    "reason_phrase": "OK",
    "uri": "channels",
    "content_type": "application\/json",
    "message_body": {
        "id": "1755849543.1",
        "name": "WebSocket\/INCOMING\/0x7f704c014640",
        "state": "Down",
        "protocol_id": "",
        "caller": {
            "name": "",
            "number": ""
        },
        "connected": {
            "name": "Dev",
            "number": "176"
        },
        "accountcode": "",
        "dialplan": {
            "context": "default",
            "exten": "s",
            "priority": 1,
            "app_name": "AppDial2",
            "app_data": "(Outgoing Line)"
        },
        "creationtime": "2025-08-22T07:59:03.093+0000",
        "language": "en",
        "channelvars": {
            "MEDIA_WEBSOCKET_CONNECTION_ID": "a6778a50-c199-4f90-9d72-e8f4df1948d3",
            "MEDIA_WEBSOCKET_OPTIMAL_FRAME_SIZE": "640"
        }
    },
    "application": "dev_robo:PJSIP\/virtualisk-00000000",
    "timestamp": "2025-08-22T07:59:03.094+0000",
    "asterisk_id": "92:00:06:45:50:b0"
}
{
    "type": "RESTRequest",
    "request_id": "f8d24f0134c635b86db95e0fd89af5cd",
    "method": "POST",
    "uri": "channels\/1755849543.1\/dial",
    "content_type": "application\/json",
    "message_body": "{\"caller\":\"1755849542.0\"}"
}
{
    "type": "RESTResponse",
    "transaction_id": "",
    "request_id": "f8d24f0134c635b86db95e0fd89af5cd",
    "status_code": 409,
    "reason_phrase": "Conflict",
    "uri": "channels\/1755849543.1\/dial",
    "content_type": "application\/json",
    "message_body": {
        "message": "Channel not in Stasis application"
    },
    "application": "dev_robo:PJSIP\/virtualisk-00000000",
    "timestamp": "2025-08-22T07:59:03.137+0000",
    "asterisk_id": "92:00:06:45:50:b0"
}

jcolp · August 22, 2025, 8:51am

mr_greno:

{
    "type": "RESTRequest",
    "request_id": "f6f2f83604328c47f8fe53c2534941e5",
    "method": "POST",
    "uri": "channels",
    "content_type": "application\/json",
    "message_body": "{\"app\":\"dev_robo:PJSIP\\\/virtualisk-00000000\",\"originator\":\"1755849542.0\",\"endpoint\":\"WebSocket\\\/INCOMING\\\/c(slin16)\"}"
}

You are NOT calling create. You are calling the normal channels route[1] which will originate. Calling dial on it will not work, and the channel will only be placed into your ARI application upon answer.

As well, every time you say “INCOMING channel” it’s not. You are creating OUTGOING channels which then are placed in the ARI application.

[1] Channels - Asterisk Documentation

mr_greno · August 22, 2025, 8:59am

I understand that Asterisk documentation can be a bit confusing at times, especially when terms like “Create channel” and “Create a new channel (originate with ID)” appear similar.

When I refer to “INCOMING,” I’m talking about the WebSocket channel, specifically the “WebSocket/INCOMING/c(ulaw),” which represents a channel coming into Asterisk and going out from my side. However, I see now that I misunderstood the terminology.

jcolp · August 22, 2025, 9:00am

That actually means an incoming connection. From the perspective of Asterisk, it’s still an outgoing channel.

mr_greno · August 22, 2025, 9:13am

Thank you, I changed the request and now I can continue.

system · September 21, 2025, 9:14am

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.

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