Call Progress (CP) Software

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:

Dial Tone
Busy Tone
Congestion Signal
Ring Back
Off Hook

GAO’s CP software consists of two user-callable functions that perform the detection, generation, and initialization operations.

Features of Call Progress (CP) Software

Implemented in assembly or C.
User-callable functions.
Low data and program memory requirements.
Easily configured to different cadences and tones.

For a complete list of GAO’s Telephony Software products, please see GAO’s Telephony Software.