Cisco 7821, Руководство администратора

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C H A P T E R
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Cisco IP Phone Hardware
• Cisco IP Phone Hardware Overview, on page 21
• Cisco IP Phone 7811, on page 22
• Cisco IP Phone 7821, on page 23
• Cisco IP Phone 7841, on page 24
• Cisco IP Phone 7861, on page 25
• Buttons and Hardware, on page 26
• Terminology Differences, on page 29
Cisco IP Phone Hardware Overview
The Cisco IP Phone provides voice communication over an Internet Protocol (IP) network. The Cisco IP Phone
functions much like a digital business phone, and allows 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, such as access to network information
and services, and customizable features and services.
The Cisco IP Phone 7841 supports Gigabit ethernet connectivity.
When adding features to the phone line keys, you are limited by the number of line keys available. You cannot
add more features than the number of line keys on your phone.
Table 6: Cisco IP Phone 7800 Series and Supported Line Keys
Supported Line Keys Phone
0 Cisco IP Phone 7811
2 Cisco IP Phone 7821
4 Cisco IP Phone 7841
16 Cisco IP Phone 7861
A Cisco IP Phone, like other network devices, must be configured and managed. These phones encode G.711
a-law, G.711 mu-law, G.722, G.722.2/AMR-WB, G.729a, G.729ab and iLBC codecs; and decode G.711
a-law, G.711 mu-law, G.722, G.722.2/AMR-WB, G.729a, G.729ab and iLBC codecs.
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
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