An Overview Of The Cisco Unified Ip Phone - Cisco 6921 Administration Manual

An Overview of the Cisco Unified IP Phone

The Cisco Unified IP Phones 6921, 6941, and 6961 provide voice communication over an IP network.
The Cisco Unified 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 is connected to your data network, it offers enhanced IP telephony
features, including access to network information and services, and customizeable features and services.
A Cisco Unified IP Phone, like other network devices, must be configured and managed. These
phones encode G.711a, G.711µ, G.729, G.729a, G.729ab, and decode G.711a, G.711µ, G.729, G.729a, and
G.729ab.
This chapter includes the following topics:
• Understanding the Cisco Unified IP Phones 6921, 6941, and 6921, page 1-2
• What Networking Protocols are Used?, page 1-9
• What Features are Supported on the Cisco Unified IP Phone 6921, 6941, and 6961?, page 1-12
• Overview of Configuring and Installing Cisco Unified IP Phones, page 1-22
• Terminology Differences, page 1-28
Caution Using a cell, mobile, or GSM phone, or two-way radio in close proximity to a Cisco Unified IP Phone
may cause interference. For more information, refer to the manufacturer's documentation of the
interfering device.
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP)
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