| Automatic   Noise Canceling (ANC) feature for clear audio in noisy environments |   
     | Meets the latest ASME A17.1   code when used with a Viking LV-1K Line Verification Panel, see DOD 246 |   
     | Meets ADA requirements for   Emergency Phones: |   
     | Automatically lights the “Call   Connected†LED |   
     | Transmits a unique location ID   code or voice announcement |   
     | Grade 2 Braille label for the   visually impaired |   
     | Non-volatile digital voice   announcer with 16 seconds of voice memory |   
     | Advanced call progress   detection |   
     | Handsfree operation |   
     | Phone line powered |   
     | Non-volatile memory (no   batteries required) |   
     | Dials up to 5 emergency   numbers |   
     | Cycles through backup phone   numbers on busy or ring-no-answer |   
     | Hangs up on CPC, silence, busy   signal, dial tone, time-out or touch tone command |   
     | Programmable to auto-answer on   incoming calls |   
     | Remotely programmable |   
     | Central Station Monitoring   capability (dials 2 numbers) |   
     | Extended temperature range:   -15°F to 130°F (-26°C to 54°C) |