[Home](./index.md) > [sip.js](./sip.js.md) > [SimpleUserDelegate](./sip.js.simpleuserdelegate.md) > [onCallReceived](./sip.js.simpleuserdelegate.oncallreceived.md) ## SimpleUserDelegate.onCallReceived() method Called when a call is received. Signature: ```typescript onCallReceived?(): void; ``` Returns: `void` ## Remarks Callback for handling incoming INVITE requests. The callback must either accept or reject the incoming call by calling `answer()` or `decline()` respectively.