Cisco IP Phone Key Expansion Module
Cisco IP Phone Key Expansion Module Setup Overview, page 1
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Key Expansion Module Power Information, page 2
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Connect a Key Expansion Module to a Cisco IP Phone, page 3
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Set up the Key Expansion Module in Cisco Unified Communications Manager, page 7
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Access Key Expansion Module Setup, page 9
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Reset the Single LCD Screen Key Expansion Module, page 10
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Troubleshoot the Key Expansion Module, page 10
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Cisco IP Phone Key Expansion Module Setup Overview
Key expansion modules add extra line appearances, speed dials, or programmable buttons to the phone. The
programmable buttons can be set up as phone line buttons, speed-dial buttons, or phone feature buttons
Caution
The slots in the side of the phone are designed only for use with the spine connectors on the key expansion
module. Insertion of other objects permanently damages the phone.
Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager
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Key Expansion Module Power Information
When adding features to your expansion module, remember that each line button supports only one feature.
You cannot add more features than the number of programmable line keys on your expansion module.
Figure 1: Cisco IP Phone 8861 with Three Cisco IP Phone 8800 Key Expansion Modules
Table 1: Cisco IP Phones and Supported Key Expansion Modules
Cisco IP Phone Key Expansion Module
Supported Key Expansion ModulesCisco IP Phone Model
2; providing 72 lines or buttonsCisco IP Phone 8851 and 8851NR
3; providing 108 lines or buttonsCisco IP Phone 8861
3; providing 108 lines or buttonsCisco IP Phone 8865 and 8865NR
Related Topics
Wall Mounts
Key Expansion Module Power Information
If you use a key expansion module with your phone then Power over Ethernet (PoE) is enough to power your
expansion modules. But a power cube is needed for smartphone or tablet charging when your expansion
module is attached.
A key expansion module uses 48V DC, 5W per module. If you are charging a smartphone or a tablet, note
the following:
Side USB: Up to 500mA/2.5W charging
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Back USB: Fast charging, Supports up to 2.1A/10.5W charging
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Cisco IP Phone Key Expansion Module
Table 2: Power-Supply Compatibility Table
Connect a Key Expansion Module to a Cisco IP Phone
Configuration
(PoE)
No8851with 2 expansion modules
No8861 with 2 expansion modules
No8861 with 3 expansion modules
No8865 with 2 expansion modules
No8865 with 3 expansion modules
Cisco IP Phone Power Cube 4802.3at PoE802.3af Power over Ethernet
YesYesYes8851 with 1 expansion module
YesNo
See the third note above
YesYesNo8861 with 1 expansion module
YesYes
See the first note above
YesYes
See the first note above
YesYesNo8865 with 1 expansion module
YesYes
See the second note above
YesYes
See the second note above
Note
The fast-charging feature on the back USB does not work when more than one expansion module
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is attached to a Cisco IP Phone 8861 using 802.3at PoE.
• The fast-charging feature on the back USB doesn’t work when more than one expansion module is
attached to a Cisco IP Phone 8861 unless Cisco Universal PoE (UPoE) is used.
Cisco IP Phone 8851 with 2 expansion modules will work on 802.3at PoE only with v08 or later
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hardware. You can find the phone version information on the lower back of the phone as part of the
TAN and PID label. Version information is also located on the individual phone packaging.
Connect a Key Expansion Module to a Cisco IP Phone
If you want to install more than one expansion module, you repeat steps 7-9 to connect the other expansion
modules together.
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