[Home](./index.md) > [sip.js](./sip.js.md) > [SessionDelegate](./sip.js.sessiondelegate.md) > [onBye](./sip.js.sessiondelegate.onbye.md) ## SessionDelegate.onBye() method Receive BYE request. https://tools.ietf.org/html/rfc3261\#section-15.1.2 Signature: ```typescript onBye?(request: IncomingByeRequest): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | request | IncomingByeRequest | Incoming BYE request. | Returns: `void`