Meets ADA requirements for Emergency Phones Can automatically light the Call Connected LED for the hearing impaired Transmits a unique location I.D. 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 Marine grade 316 stainless steel prevents corrosion on stainless models Dials up to 5 emergency numbers Cycles through backup emergency and non emergency 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 CPC, silence, busy signal, dial tone, time out or touch tone command Programmable to auto answer on incoming calls Remotely programmable Extended temperature range 15 F to 130 F 9 different chassis or board only available Available in 42 tall tower phone model E 1600A BLT EWP DOD# 217 Central Station Monitoring capability dials 2 numbers Optoinal PB 100 Polling System available DOD# 232 Optional BLK 3 EWP strobe light kit available DOD# 653