C H A P T E R
3
Cisco IP Phone Hardware
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Overview of the Cisco IP Phone 6800 Series Multiplatform Phones, on page 23
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Cisco IP Phone 6821 Multiplatform Phones Connections, on page 24
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Cisco IP Phone 6841 Multiplatform Phones Connections, on page 25
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Cisco IP Phone 6851 Multiplatform Phones Connections, on page 25
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Cisco IP Phone 6861 Multiplatform Phones Connections, on page 26
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Cisco IP Phone 6821 Multiplatform Phones Buttons and Hardware, on page 27
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Cisco IP Phone 6841, 6851, and 6861 Multiplatform Phones Buttons and Hardware, on page 29
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Softkey, Line, and Feature Buttons, on page 30
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Terminology Differences, on page 31
Overview of the Cisco IP Phone 6800 Series Multiplatform
Phones
The Cisco IP Phone 6800 Series Multiplatform Phones comprises a set of full-featured VoIP
(Voice-over-Internet Protocol) phones that provide voice communication over an IP network. The phones
provide all the features of traditional business phones, such as call forwarding, redialing, speed dialing,
transferring calls, and conference calling. The Cisco IP Phone 6800 Series Multiplatform Phones is targeted
for solutions that are centered on third-party SIP-based IP PBX.
In the following figure, the Cisco IP Phone 6821 Multiplatform Phones is on the left. The Cisco IP Phone
6841 and 6851 Multiplatform Phones look the same, and are in the middle. The Cisco IP Phone 6851
Multiplatform Phones support Key Expansion Module(KEM). The Cisco IP Phone 6861 Multiplatform Phones
is on the right.
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
23
