The Commetrex Call Classifier (CC) determines whether a call is voice, fax, or data by examining the call’s media stream. This function is useful in media gateways that accept PSTN calls without knowing the type of stream processing, such as vocoder, fax or data modem relay, to place in the call path.
All voice calls may be eligible for compression. Yet, most fax and data modems do not tolerate compression functions well. It is, therefore, important to quickly classify these call streams and notify the controlling entity.