Be relevant, attentive, and accurate with Call Progress Analysis Today’s customers want real-time updates for their services and products. Use CPA with speech recognition to successfully deliver complete, personalized messages to your customers. Go Beyond Auto-Dialing with High-Tech Telephony LumenVox Call Progress Analysis uses both Speech Recognition and tone detection to make contact centers more efficient and effective. Go over and above predictive dialers. LumenVox’s CPA recognizes speech and detects tone using proprietary VAD technology. Start hitting your contact center targets, knowing that your auto-dialer software is equipped to identify every call with pinpoint accuracy and deliver a full, customized message to your customers when an answering machine tone is detected.