In noisy, dusty production environments—factories, chemical plants, mills, etc.—in—building wireless communications can be a convenience, a boost to productivity and, in dire situations, a life—saver.Digital Enhanced Cordless Telephony (DECT) is an ideal wireless solution for these environments because it supports a secure, dedicated, voice—only network in an assigned frequency band. This eliminates or minimizes interference from RFID devices or scanners.DECT also requires a shortened planning cycle when compared with Wi—Fi and is consequently more easily scalable. Handsets for Production Environments These handsets are specifically designed for rugged production environments. These shock and scratch—proof phones with back—lit keypads, large displays and enhanced liquid and dust protection are designed to enable users to quickly make and receive phone calls (including Caller ID), take advantage of hold, conferencing and messaging and get efficient access to additional Avaya Aura® Communication Manager capabilities.Communications takes place over a dedicated, encrypted wireless network. Batteries support up to 18 hours of talk time and up to 150 hours of standby time (10 / 90 hours on the 3745 & 3749).