Cisco IP Phone 7800 Seriescan deliver high-quality, full-featured VoIP communications for small to large enterprises. The Products Family includes 7811, 7821, 7841, and 7861 models. And IP Phone 7811 can offer wideband audio with purchase of a wideband handset. The 7800 Series support up to 16 Programmable line keys, Full duplex speakerphone and Third-party call control. In short, Cisco IP Phone 7800 Series can increase your business call efficiency and productivity, while reducing the costs of IT operating.