Cisco 8851, Administration Manual

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Cisco IP Phone Key Expansion Module Setup Overview
The Cisco IP Phone 8800 Key Expansion Module adds extra programmable buttons to the phone. The
programmable buttons can be set up as phone line buttons, speed-dial buttons, or phone feature buttons
The following table lists the phones and the number of key expansion modules that each model supports.
Table 14: Cisco IP Phones and Supported Key Expansion Modules
Supported Key Expansion Modules Cisco IP Phone Model
2; providing 72 lines or buttons Cisco IP Phone 8851
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
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Cisco IP Phone Key Expansion Module Setup Overview