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Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
1
An Overview of the Cisco Unified IP Phone
The Cisco Unified IP Phone 6921, 6941, and 6961 provide voice communication over an Internet
Protocol (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 Phone 6921, 6941, and 6961, 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 1-11
• Overview of Configuring and Installing Cisco Unified IP Phones, page 1-13
• Terminology Differences, page 1-20
Caution Using a cell, mobile, or GSM phone, or two-way radio in close proximity to a Cisco Unified IP Phone
might cause interference. For more information, refer to the manufacturer’s documentation of the
interfering device.