Cisco IP Phone 8800 SeriesĀ is designed for small to large businesses seeking high-quality, full-featured VoIP communications. The 8800 Series includes 8865, 8861, 8851, 8845, 8841, 8831, 8821 and 8811 models. All models with the exception of 8831 model support Gigabit Ethernet. Furthermore, only 8861 and 8865 models support 802.11 Wi-Fi. Overall, the series deliver easy-to-use video and voice collaboration.