Deploy reliable & highly secure voice communications with the Cisco IP Phone 7821. This full-featured phone is easy to use & easy on your budget. This endpoint supports wideband audio for superior voice communications quality & advanced IP telephony features to make your business calls more efficient & productive. Dedicated fixed keys for common functions such as conference, messaging, & directory, & a two-way navigation button Full wideband audio performance throughout the handset, headset, & speakerphone for superior clarity Electronic hookswitch control for added flexibility in managing personal calls when using third-party headsets Power over Ethernet (Po E) Class 1 endpoint & Cisco Energy Wise to reduce your energy costs & carbon footprint Enhanced customization with a field-replaceable bezel option Integrated IEEE 10/100 switch to support traffic from a co-located PC for reduced cable infrastructure costs A wall-mount option for common areas such as aisles or hallways, or where desk space is limited