Cisco 8800 - 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
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
•
Back USB: Fast charging, Supports up to 2.1A/10.5W charging
Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager
2
Cisco IP Phone Key Expansion Module
Key Expansion Module Power Information