Line Keys – Full-featured 1-line business. Speaker Phone – Built-in high-quality microphone and speaker. Ethernet Connectivity – Two Ethernet ports with integrated Ethernet switch: 10/100BASE-T RJ-45. Headset Support – On-hook default audio configuration, Headset jack: 2.5 mm. Compatible Platforms – Supports both Session Initiation Protocol (SIP) and Smart Phone Control Protocol (SPCP) with the Cisco Unified Communications 500 Series. Contents – Cisco 1-Line IP phone, handset, and stand, Handset cord, RJ-45 Ethernet cable, and Quick-Start Installation. Warranty – 1-year limited hardware warranty with return to factory replacement and a 90-day limited software warranty. Does not include power supply.