> 1 | Introduction

> This application note1 provides technical recommendations for integrating audio accessories into cellular applications based on Siemens GSM modules. It discusses various solutions for typical design approaches, evaluates strategies of overvoltage protection, explains the concept of speakerphone operation, and then focuses on audio specific AT commands. A list of sales contacts and a summary of the discussed audio accessories is included.

> 1
> The document is effective only if listed in the appropriate Release Notes as part of the technical documentation delivered with your Siemens wireless product.