The Cisco 7821 IP Phone forms part of the Cisco 7800 Series. This model supports two SIP accounts and delivers advanced IP Telephony features as well as crystal clear wideband audio. The Cisco 7821 has a generously sized 3.5" greyscale backlit display and supports PoE, an optional power supply is available for non-PoE deployments.
The Cisco 7821 IP phone allows for use of a wired or wirelss RJ9 headset, for EHS support you will require and EHS adaptor.
View Cisco 7821 SIP Phone Datasheet for full list of technical specifications