Building Intercoms Intercom Systems > Building Intercoms    Aiphone VC-M Audio Entry Security Intercom Features: •    Entrance panels available in a variety of sizes: 2, 4, 6, and 10 call buttons. •    Add-on panels with 8 or 16 call buttons. •    Larger entrance panels in 26, 42, or 58 call button sizes. •    One or two entrances with selective door release. (Use VC-MW/B with two entrances.) •    Directory panel is backlit. •    Up to two handsets per apartment •    Optional external signaling (RY-PA required).