The phone offers an easy-to-use interface and provides a traditional telephony-like user experience. White backlit, greyscale, 3.5” 396×162 pixel-based display on the IP Phone 7821, 7841 and 7861. The handset is a standard wideband-capable audio handset (connects through an RJ-9 port) for the IP Phone 7821, 7841 and 7861. The analog headset jack is a standard wideband-capable RJ-9 audio port for the IP Phone 7821, 7841, and 7861. The phone supports backlit indicators for the audio path keys (handset, headset and speakerphone), select key, line keys, and message waiting. A volume-control toggle provides easy decibel-level adjustments of the handset, monitor speaker, and ringer. Full-duplex speakerphone allows gives you flexibility in placing and receiving calls. For added security, the audible dual tone multifrequency (DTMF) tones are masked when the speakerphone mode is used. The display is easy to view and the buttons and keys are easy to use. The two-position foot stand supports viewing angles of 30 degrees and 45 degrees; you can remove the foot stand for wall mounting, with mounting holes located on the base of the phone. The phone can be installed on a wall using optional wall-mount kit (available separately). The hookswitch can be controlled electronically with a third party headset connected to the auxiliary port. The phone supports IEEE 802.3af PoE (Class 1); power consumption does not exceed 3.84 watts. Cost-Effective, Simple Voice Collaboration. Get easy-to-use, highly secure, and highly cost-effective voice communications for small to large businesses. The 7821 is supported on Cisco on-premises, hosted, Webex Calling and third-party call control offer flexible deployment options.. Meet the needs of both information workers and managers who have occasional-to-light voice communications requirements with the Cisco IP Phone 7821.. User Experience Enhancing Collaboration. - Two-lines deliver more efficient call handling. - High-resolution graphical grayscale display makes viewing easier. - Dedicated fixed keys ease communications for increased productivity. - Built-in speakerphone supports hands-free communications. - Wideband audio enhances clarity with the handset, speaker, or a headset. Simple, Cost-Effective Administration. Key features to ease and reduce costs of administration include:. - Flexible deployment options with Cisco on-premises, hosted, and Webex Calling.. - Cisco Expressway supports remote worker single sign-on access without a VPN client. - Power over Ethernet (PoE) Class 1 and Cisco EnergyWise lowers energy costs. - Integrated IEEE 10/100 switch reduces installation costs and footprint at the desk. - Cisco Webex Phone OS consolidates administration with common software to both the IP Phone 7800 Series and IP Phone 8800 Series. Design. Mounting. Desk/Wall. Case material. Acrylonitrile butadiene styrene (ABS). Product colour. Charcoal. Handset type. Wired handset. Product type. IP Phone. Phone features. Call transfer. Yes. Call park. Yes. Call return. Yes. Call history. Yes. Intercom. Yes. Caller ID. Yes. Call waiting. Yes. Speed dialling. Yes. Call hold. Yes. Call forwarding. Yes. Conference call. Yes. Redialing. Yes. Do not disturb function. Yes. Call pick up. Yes. Answering machine. Yes. Lines quantity. 2 lines. Display. Backlight colour. White. Backlight display. Yes. Display resolution. 396 x 162 pixels. Display diagonal. 8.89 cm (3.5"). Camera. Front camera. No. Audio. Voice codecs. G.711a, G.711u, G.722, G.729A, iLBC. Microphone mute. Yes. Speakerphone. Yes. Network. Quality of Service (QoS) support. Yes. DHCP client. Yes. Supported network protocols. SIP, SRTP, TLS. Networking standards. IEEE 802.3, IEEE 802.3af. Security algorithms. 128-bit AES, 256-bit AES, 802.1x RADIUS. Bluetooth. No. Wi-Fi. No. Ethernet LAN interface type. Fast Ethernet. Ethernet LAN data rates. 10,100 Mbit/s. Ethernet LAN. Yes. Ports & interfaces. RJ-11 ports quantity. 1. DC-in jack. Yes. Ethernet LAN (RJ-45) ports. 2. Certificates. Certification. CEEMCFCC. Compliance industry standards. TIA 810, TIA 920IEEE 802.3 Ethernet, IEEE 802.3af, 802.3at. Safety. UL 60950 Second Edition, CAN/CSA-C22.2 No. 60950 Second Edition, EN 60950 Second Edition (incl. A11 & A12), IEC 60950 Second Edition (incl. A11 & A12), AS/NZS 60950, GB4943. Power. Power over Ethernet (PoE). Yes. Operational conditions. Operating temperature (T-T). 0 - 40 °C. Operating relative humidity (H-H). 10 - 90%. Weight & dimensions. Weight. 867 g. Height. 28 mm. Depth. 206 mm. Width. 207 mm
