Custom SIP headers to add to INVITE. Has no effect on calls to phone numbers. | Name | Type | Default | Description | |:--|:--|:--|:-| | headersOptional | object[] | - | An array of objects that accept the [headers parameters](#headers-parameters). | ## headers parameters | Name | Type | Default | Description | |:|:|:--|:--| | nameRequired | string | - | The name of the header.. | | valueRequired | string | - | The value of the header.. | ## Example yaml andJson version: 1.0.0 sections: main: - connect: to: sip:user-a@