The Cisco Unified IP Phone 524SG is a four-line IP phone with up to eight call line appearances. A 10/100 PC switch port enables LAN connectivity to a co-located PC that helps you reduce additional phone wiring costs. Designation of separate 802.1q VLANs for PC & phone provides security & reliability of voice & data traffic. The phone can be powered by a network switch with Power over Ethernet (Po E) capability or use an optional power adapter.