# Common API - Extension call state callback parameters

#### Interface Description
To call back the call status of an extension, you need to configure a callback address for the corresponding account.
Callback address configuration for extension call status: The customer provides an interface address that can receive json data, which can be configured by us or by the customer in the background.

#### Extension call status callback data format

```
{
"buuid":"526d643a-e8fe-11ea-a84a-cf6e45e88543",
"callee":"87847569524",
"caller":"90240005",
"companycode":"9024",
"customuuid":"123Abc",
"direction":"callout",
"disnumber":"2190240001",
"extnumber":"90240005",
"isbleg":"false",
"method":"3",
"starttime":"1598598959",
"status":"ring",
"type":"call",
"uuid":"526d637c-e8fe-11ea-a849-cf6e45e88543"
}

```

#### Explanation of extension call status callback parameters

| parameter name         | type     | illustrate|
| :---------- | :----- | :------------------------------------------------------------ |
| buuid       | string | The uuid of the called number on side b of the call    |
| callee      | int    | called number     |
| caller      | int    | calling number        |
| companycode | int    | The company id corresponding to the account  |
| customuuid  | string | Custom parameter - customer id     |
| direction   | string | Call direction: 1. Incoming; 2. Outgoing; |
| disnumber   | int    | Destination number to call                                                       |
| extnumber   | int    | Ext                                                           |
| isbleg      | string | true is ringing on the mobile phone side; false is ringing on the seat side;  |
| method      | string | Call method: 0, unlimited; 1, mutual extension dial; 2, extension direct dial; 3, API call (default); 4, API double call; 5, predictive outbound call; 6, IVR/group call. |
| starttime   | string | call time                                                          |
| status      | string | call type                                                          |
| type        | string | call type                                                          |
| uuid        | string |call uuid                                                       |