[Home](./index.md) > [sip.js](./sip.js.md) > [Inviter](./sip.js.inviter.md) > [(constructor)](./sip.js.inviter._constructor_.md) ## Inviter.(constructor) Constructs a new instance of the `Inviter` class. Signature: ```typescript constructor(userAgent: UserAgent, targetURI: URI, options?: InviterOptions); ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | userAgent | UserAgent | User agent. See [UserAgent](./sip.js.useragent.md) for details. | | targetURI | URI | Request URI identifying the target of the message. | | options | InviterOptions | Options bucket. See [InviterOptions](./sip.js.inviteroptions.md) for details. |