Introduction

Increase Productivity with Clear Communications
Deploy reliable and highly secure voice communications with the Cisco IP Phone 7821. This full-featured phone is easy to use and easy on your budget. This endpoint supports wideband audio for superior voice communications quality and advanced IP telephony features to make your business calls more efficient and productive.

The Cisco IP Phone 7821 is a two-line endpoint that is designed for information workers and managers. This phone is ideal for:

- Customers who currently use traditional analog or digital phones but want to move to IP telephony
- Organizations that want to expand their voice communications investment by using Cisco Unified Communications

Superior User Experience
To improve the user experience, this phone has four context-sensitive soft keys and a white-backlit display that:

- Measures 3.5 inches (89 millimeters)
- Has high-resolution graphics and grayscale
- Is 396 x 162 pixels

Other features and capabilities of the 7821 phone that contribute to an exceptional user experience include:

- Dedicated fixed keys for common functions such as conference, messaging, and directory, and a two-way navigation button
- Full wideband audio (G.722) performance throughout the handset, headset, and speakerphone for superior clarity
- Electronic hookswitch control for added flexibility in managing personal calls when using third-party headsets

Easy Administration
The 7821 phone is easy to deploy and manage, with features such as:

- Power over Ethernet (PoE) Class 1 endpoint and Cisco EnergyWise to reduce your energy costs and 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

Design

Product type

IP Phone

Handset type

Wired handset

Product colour

Black, Silver

Case material

Polycarbonate

Wall mountable

Y

Mounting

Desk/Wall

Phone features

Lines quantity

2 lines

Answering machine

Y

Call waiting

Y

Speed dialling

Y

Call hold

Y

Call forwarding

Y

Conference call

Y

Caller ID

Y

Management features

Integrated voicemail

Y

Volume control

Digital

Display

Display diagonal

8.89 cm (3.5")

Display resolution

396 x 162 pixels

Touchscreen

N

Audio

Speakerphone

Y

Voice codecs

G.711a,G.722,G.729A,G.729B,iLBC

Network

Ethernet LAN

Y

Wi-Fi

N

Bluetooth

N

Supported network protocols

IEEE 802.3, IEEE 802.3u, IEEE 802.3af

Quality of Service (QoS) support

Y

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)

Y

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