---
page_type: sample
description: "Demonstrates a simple controller-less modem driver."
languages:
- cpp
products:
- windows
- windows-wdk
---

# Fakemodem Driver

The Fakemodem sample demonstrates a simple controller-less modem driver. This driver supports sending and receiving AT commands using the `ReadFile`/`WriteFile` calls or via a TAPI interface using an application such as *HyperTerminal.*

## Universal Windows Driver Compliant

This sample builds a Universal Windows Driver. It uses only APIs and DDIs that are included in OneCoreUAP.