Fast PBX Business Phone System / 5-Line Business Class Wireless IP Handset with Bluetooth Cisco-powered Complete Business Phone System, expands up to 1000 lines 5-Line Business Class IP Phone Business Essentials: call forwarding, music-on-hold, digital receptionist, ring groups, and so much more! Plug & Play capability for easy, do-it-yourself installation Activation Required for full-feature experience (Keep your phone number)