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
The C-4000 (referenced in ) serves as a multi-tenant entry controller designed to interface with standard dedicated phone lines or CO lines. Its primary function is to allow visitors to contact tenants via an entry phone, providing a secure method for remote door or gate release. II. Core Functionalities Capacity: Supports up to 250 tenants or phone numbers. Dod (164) mp4
Many configurations support activity logging, ensuring a digital trail of who accessed the building and when. Contextual Alternative: Research and Medicine The system is often used alongside video entry