Special Features:

102x33 lcd display; full-duplex handsfree; 330hz - 3300hz handset frequency response; individual volume settings; voice activated detection; shared call/bridged line; call waiting/transfer/hold/divert/pickup; local 3-way calling; remote missed call; intercom; ietf sip protocol support; tls; encrypted configuration files; password login; https; 10 to 40 c operating temp

Properties:

An item specifically designed to convert sound into variations of an electric current and to reconvert similar variations into their original sound with sufficient accuracy for clear intelligibility. It consists of a telephone transmitter, telephone receiver, and a switch and is primarily used for voice communications. Includes pedestal type, cradle type and hang-up type telephones. Does not include separate handsets or head and chest sets.