[Home](./index.md) > [sip.js](./sip.js.md) > [SessionDescriptionHandlerModifier](./sip.js.sessiondescriptionhandlermodifier.md) ## SessionDescriptionHandlerModifier interface Modifier for [SessionDescriptionHandler](./sip.js.sessiondescriptionhandler.md) offer/answer. Signature: ```typescript export interface SessionDescriptionHandlerModifier ```