Norstar-Avaya T7406E Cordless Phone with Base (NT8B45AAAP) Nortel Norstar T7406e Cordless Phone T7406E has been specifically designed for all releases of Norstar 3x8, 6x16, 8x24, CICS, MICS, and BCM telephone systems Nortel Norstar T7406e Cordless Phone is also compatible with Avaya IP Office and Avaya IP Office Quick Version equipped with IP500 TCM 8, IP500 Digital Station 16A, or IP500 Digital Station 30A Max Handsets: 4 per basestation, 8 utilizing 2 basestations Handset features include: handsfree/speakerphone, vibrate/silentmode, 20 name directory, backlight and message waiting options,signal strength indicator andout-of-range audible alert Frequency: 2.4 GHz