Cisco IP Business Phone 7821 w, 3.5-inch Greyscale Display, Class 1 PoE, Supports 2 Lines, 1-Year Limited Hardware Warranty (CP-7821-K9=). Product type: IP Phone, Product colour: Black, Silver, Handset type: Wired handset. Lines quantity: 2 lines. Volume control: Digital. Display diagonal: 8.89 cm (3.5"), Display resolution: 396 x 162 pixels. Voice codecs: G.711a, G.722, G.729A, G.729B, iLBC

The Cisco IP Business Phone 7821 with Multi-Platform Phone Firmware delivers high-fidelity voice communications to improve inter-office communication while helping to lower operating costs. This voice over IP phone is ideal for any medium-sized to large company that wants to update its phone system from a traditional analogue or digital-based system to an IP Communications system.

Design
Product type	IP Phone
Product colour	Black, Silver
Handset type	Wired handset
Case material	Polycarbonate
Wall mountable	Yes
Mounting	Desk/Wall
Phone features
Lines quantity	2 lines
Caller ID	Yes
Answering machine	Yes
Call waiting	Yes
Speed dialling	Yes
Call hold	Yes
Call forwarding	Yes
Conference call	Yes
Management features
Integrated voicemail	Yes
Volume control	Digital
Display
Touchscreen	No
Display diagonal	8.89 cm (3.5")
Display resolution	396 x 162 pixels
Audio
Speakerphone	Yes
Voice codecs	G.711a, G.722, G.729A, G.729B, iLBC
Network
Ethernet LAN	Yes
Wi-Fi	No
Bluetooth	No
Supported network protocols	IEEE 802.3, IEEE 802.3u, IEEE 802.3af
Quality of Service (QoS) support	Yes
Security algorithms	802.1x RADIUS
Ports & interfaces
Ethernet LAN (RJ-45) ports	2
Certificates
Safety	UL 60950, CAN/CSA - C22.2, EN 60950, IEC 60950, 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%
Storage relative humidity (H-H)	10 - 95%
Storage temperature (T-T)	-10 - 60 °C
Weight & dimensions
Width	207 mm
Depth	206 mm
Height	28 mm
Weight	867 g
Package width	234.9 mm
Package depth	279.9 mm
Package height	71.9 mm
Package weight	1.2 kg
Logistics data
Country of origin	China
Quantity per pack	1 pc(s)
Harmonized System (HS) code	85171800