One of the most affordable 4-line office phone systems on the market today. Setting up the ErisBusinessSystem is as easy as 1-2-3. Just connect your Ethernet cable and up to four lines to the main console. Connect your desksets to the Ethernet network and then register your wireless accessories (sold separately). No professional assistance required. This system grows with your business; add extension desksets, up to 15 total, and compatible cordless accessories. With a built-in auto attendant, you'll never miss a message. Customize call handling during office hours and after, making sure callers are automatically routed to the right extensions.