The Cisco 6901 1-line unified IP phone with slimline handset, is an innovative portfolio of endpoints that deliver business-grade, voice communication services to customers worldwide. IP phone with VoIP communication technology, has RJ-45 network and RJ-45 PoE ports to provide better connectivity. It has digital duplex speakerphone for hands-free operation. The phone has ringer and volume controls, hold and redial buttons for added convenience. The corded phone built-in web server, supports voice codecs and network protocols for reliable performance..IP phone designed for simplicity and high usability.Interfaces/ports: One network (RJ-45) and PoE (RJ-45).Voice codecs: G.711a, G.711u, G.729a, G.729ab.Communication technology: VoIP.Number of lines: One.Controls: Ringer, volume.Call Services: Voice Mail, Call Waiting, Call Forwarding, Call Transfer, Call Hold.Dimensions: 8.1"H x 3.7"W x 1.8"D.Body Color: Charcoal.Comes with 1 year warranty.Comes in charcoal gray color.Product Type: VoIP phone.Voice Mail Capability: Yes.Network Ports Qty: 1 x Ethernet 10Base-T/100Base-TX.Dialler type: Keypad, Dialler location: Base.Built-in web server, music on hold.Network protocols: Cisco Discovery Protocol (CDP), VoIP protocols: SCCP.Special buttons: Hold button and redial button.Speakerphone: Yes ( digital duplex ).Memory: 32MB RAM, 8MB flash memory