Zenitel Turbine Extended Intercoms TEIV1+ and TEIV4+
The TEIV1+ is designed to simplify a visitor’s experience with PIN-based access control and easy-to-use scroll and direct calls. The TEIV4+ is designed to provide convenient access...
Peter Mckeag Turbine Extended Intercoms Product Manager Automatic Volume Control Acoustic Echo Cancellation Active Noise Reduction
Source: securityinfowatch.com