Cisco Ip Phone Hardware Overview - Cisco 7800 series Administrator's Manual

Cisco IP Phone Hardware
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Cisco IP Phone Hardware Overview

The Cisco IP Phone 7811, 7821, 7841, and 7861 provides voice communication over an Internet Protocol
(IP) network. The Cisco IP Phone functions much like a digital business phone, allowing you to place and
receive phone calls and to access features such as mute, hold, transfer, speed dial, call forward, and more. In
addition, because the phone connects to your data network, it offers enhanced IP telephony features, including
access to network information and services, and customizable features and services.
The Cisco IP Phones have the following features:
• Programmable line keys supports up to 16 lines (Cisco IP Phone 7821 supports 2 lines, Cisco IP Phone
• Gigabit ethernet connectivity. (This applies only to Cisco IP Phone 7841.)
A Cisco IP Phone, like other network devices, must be configured and managed. These phones encode the
following codecs:
• G.711 a-law
Cisco IP Phone Hardware Overview, page 17
Cisco IP Phone 7811, page 18
Cisco IP Phone 7821, page 19
Cisco IP Phone 7841, page 20
Cisco IP Phone 7861, page 21
Buttons and Hardware, page 22
Terminology Differences, page 25
7841 supports 4 lines, and Cisco IP Phone 7861 supports 16 lines) or that can be programmed for other
features.
The Cisco IP Phone 7811 does not support programmable line key.
Note
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
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