H264first: boolean

Use H264 video codec, if exist

customData: string

Custom string associated with the call session. It can be later obtained from Call History using HTTP API. Maximum size is 200 bytes.

extraHeaders: Object

Optional custom parameters (SIP headers) that should be passed with call (INVITE) message. Parameter names must start with "X-" to be processed by application. IMPORTANT: Headers size limit is 200 bytes.

number: string

The number to call. The international format E.164 is preferable

video: VideoFlags|boolean

Tells if video should be supported for the call