| Name | Type | Description | Notes |
|---|---|---|---|
| callControlId | String | Unique ID for controlling the call. | [optional] |
| callLegId | String | ID that is unique to the call and can be used to correlate webhook events. | [optional] |
| callSessionId | String | ID that is unique to the call session and can be used to correlate webhook events. Call session is a group of related call legs that logically belong to the same phone call, e.g. an inbound and outbound leg of a transferred call. | [optional] |
| connectionId | String | Call Control App ID (formerly Telnyx connection ID) used in the call. | [optional] |
| clientState | String | State received from a command. | [optional] |
| from | String | Number or SIP URI placing the call. | [optional] |
| sipNotifyResponse | Integer | SIP NOTIFY event status for tracking the REFER attempt. | [optional] |
| to | String | Destination number or SIP URI of the call. | [optional] |