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 Blue “Call Connected” LED indicator E 30/E 32 IP only 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 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 Programmable to dial up to 5 numbers on busy or ring no answer 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 40 F to 140 F 3 different chassis or board only available Volume adjustments for microphone and speaker E 10 IP and E 30 IP are flush mountable using the included rough in box or can be surface mounted using an optional VE 5x5 Surface Mount Box DOD# 424 E 32 IP flush mounts in a standard double gang electrical box not included or can be surface mounted using an optional VE 5x5 Surface Mount Box DOD# 424