GAO's Call Progress (CP) software provides full call progress tone detection and generation functionality and operates on PCM samples. Call progress is a tonal signaling standard that is used to acquire connections between subscribers in telephone network systems and to indicate the status of the incoming and outgoing phone calls. The GAO CP software module is able to support the following signals:
GAO's CP software consists of two user-callable functions that perform the detection, generation, and initialization operations.
For a complete list of GAO's Telephony Software products, please see GAO's Telephony Software.