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 compliant (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 VoIP eliminates the need for "Push to Talk" mode Network downloadable firmware Meets ADA requirements for Emergency Phones: - Automatically lights the Red "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 T-10 Torx Security Screws for added security Handsfree operation Marine grade 316 stainless steel prevents corrosion on the stainless steel models Laser etched graphics on stainless steel models Dials up to 5 emergency numbers E-1600-20-IP, E-1600-22-IP, E-1600-52-IP, and E-1600-TP2IPEWP dial up to 5 non-emergency "INFO" numbers Cycles through backup phone numbers on busy or no-answer Optional Enhanced Weather Protection (EWP), EWP products are designed to meet IP66 Ingress Protection Rating, see DOD# 859 Hangs up on busy signal, time-out or touch tone command Remotely programmable Extended temperature range (-30?F to 130?F) 11 different chassis or board only available