Line Keys - Support 8 lines with paper label. Speaker Phone - Built-in high-quality microphone and speaker. Ethernet Connectivity - Two Ethernet ports with integrated Ethernet switch: 10/100BASE-T RJ-4. 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 Basic 8-Line IP phone, handset, and stand, Handset cord, RJ-45 Ethernet cable, Quick-Start Guide, CD. Warranty - 1-year limited hardware warranty with return to factory replacement and a 90-day limited software warranty.