THE TOA VS-900 SECURITY INTERCOM SYSTEM provides reliable and intelligible voice communication for critical security applications, including corporate security, correctional institutions, educational facilities, hospital access points, and parking structures. For over 35 years, TOA has developed a proven track record of innovative, reliable intercom products, including the groundbreaking EXES and IC-100 systems. The TOA VS-900 system is UL and CUL Listed and manufactured to ISO-9001 standards to ensure continuous operation for extended periods.