SIPResponse404NotFound404NotFound404NotFound---(*)486Busyhere408RequestTimeout480Temporarilyunavailable480Temporarilyunavailable403Forbidden(+)410Gone301Movedpermanently 410Gone404NotFound(=)502BadGateway484Addressincomplete510Notimplemented480TemporarilyunavailableResourceunavailable503Serviceunavailable503Service...