[Home](./index.md) > [sip.js](./sip.js.md) > [SessionDescriptionHandlerOptions](./sip.js.sessiondescriptionhandleroptions.md) ## SessionDescriptionHandlerOptions interface Options for [SessionDescriptionHandler](./sip.js.sessiondescriptionhandler.md) methods. Signature: ```typescript export interface SessionDescriptionHandlerOptions ``` ## Remarks These options are provided to various UserAgent methods (invite() for example) and passed through on calls to getDescription() and setDescription(). ## Properties | Property | Type | Description | | --- | --- | --- | | [constraints](./sip.js.sessiondescriptionhandleroptions.constraints.md) | object | |