Self diagnostic reports via email (testing com, mic, speaker & switch) Automatic polling and programming software included 2 Amp relay contacts for door/gate or SL-2 strobe light control SIP compatible (see pg 2 for list of compatible IP-PBX phone systems) PoE powered (class 1, <4 watts) Automatic Noise Canceling (ANC) feature for proper operation in noisy environments Network downloadable firmware Meets ADA requirements for Emergency Phones: Automatically lights the Call Connected" LED Transmits a unique location I.D. code or voice announcement Grade 2 Braille label for the visually impaired Non-volatile digital voice announcer with 28 seconds of voice memory Handsfree operation Marine grade 316 stainless steel prevents corrosion on the stainless steel models Dials up to 5 emergency numbers 11 different chassis or board only available