[Home](./index.md) > [sip.js](./sip.js.md) > [InvitationRejectOptions](./sip.js.invitationrejectoptions.md) > [reasonPhrase](./sip.js.invitationrejectoptions.reasonphrase.md) ## InvitationRejectOptions.reasonPhrase property Reason phrase for response. Signature: ```typescript reasonPhrase?: string; ```