The system is often used alongside video entry phones (such as the K-1705-3 , detailed in related documents like DOD# 158) to provide visual verification of visitors before granting access. III. Modern Significance in Security
In the context of modern infrastructure, the C-4000 represents the shift toward centralized, programmable building security. It allows for: Dod (164) mp4
Features two Wiegand inputs for proximity card readers or keypads, and two programmable relays for controlling multiple gates or doors. The system is often used alongside video entry