FeaturesThe 8520TAD voice/data terminal is used with the ISDN communication system through a 4-wire T-interface.20 programmable buttons, each with a red and green status light9 fixed feature buttonsISDN terminalLarge supertwistable LCD; 7-lines, 24-charactersCall logs keep track of 60 recent callsButtons for the Mute, Redial, Conference, Drop, Transfer, and Hold featuresSpeakerphone which can also be optioned as a listen-only SpeakerVolume controlImproved acoustic quality with the K-type handsetAdjunct jack for adjunct equipmentIncludes RefurbishedLibrary Avaya Lucent ATT 8520 ISDN.pdf
