The Cisco Unified IP Phone 521SG is a single-line IP phone with two call line appearances and one-touch access to redial, transfer, conference, and hold or resume. A 10/100 PC switch port enables LAN connectivity to a colocated PC that helps you reduce additional phone wiring costs. The phone can also be powered by a network switch with Power over Ethernet (PoE) capability or use an optional power adapter. Designation of separate 802.1q VLANs for PC and phone provides security and reliability of voice and data traffic.
Flexible to suit the needs of small to medium-sized businesses, the Cisco Unified IP Phone 521SG: