Key Expansion Module Power Information - Cisco 8841 User Manual

Note: The Cisco IP Phone 8851 KEM requires Firmware Release
11.2(3) or later.

Key Expansion Module Power Information

If you use a Key Expansion Module (KEM) with your IP phone, then Power over Ethernet (PoE)
is enough to power your expansion modules. But, your phone must have an IP address in order
to charge the expansion module.
A power cube (power supply) is needed for smartphone or tablet charging when your key
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
Configuration
8851 with 1 key
expansion module
Cisco IP Phone 8841/8851 Multiplatform Phones User Guide
802.3af Power over
Ethernet (PoE)
Yes
802.3at PoE
Yes
Wireless Headsets
Cisco IP Phone
Power Cube 4
Yes
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