GAI-Tronics 393-700 RED ALERT 300 Series Hands-free VoIP Telephone Manual User Manual | Page 13 / 27 | Also for: 393AL-700 RED ALERT 300 Series Hands-free VoIP Telephone Manual, 397-700 RED ALERT 300 Series Hands-free VoIP Telephone Manual, 398-701 RED ALERT 300 Series Hands-free VoIP Telephone Manual, 394AL-702 RED ALERT 300 Series Hands-free VoIP Telephone Manual, 397-701 RED ALERT 300 Series Hands-free VoIP Telephone Manual, 398-702 RED ALERT 300 Series Hands-free VoIP Telephone Manual