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- PoE powered class 1, <4 watts- Automatic Noise Canceling ANC feature for proper operation in noisy environments- VoIP eliminates the need for In.Push to TalkIn. mode- Network downloadable firmware- Handsfree operation- Programmable to dial up to 5 numbers on busy or ring no answer- Cycles through backup phone numbers on busy or no answer- Enhanced Weather Protection EWP, designed to meet IP66 rating- Hangs up on busy signal, time-out or touch tone command- Remotely programmable- Extended temperature range -30 Degrees F to 130 Degrees F- 3 different chassis or board only available- Volume adjustments for microphone and speaker- Optional PB-100 polling system available- Optional SL-2 or BL-4-EWP strobe light kit available