Cisco 8800 Series, Manual

Page: 496 / 544

You can use more than one expansion module per phone. But each module must be the same type. You cannot
mix Cisco IP Phone 8800 Key Expansion Module with a Cisco IP Phone 8851/8861 Key Expansion Module
or with a Cisco IP Phone 8865 Key Expansion Module. You cannot mix audio expansion modules with video
expansion modules. You also cannot use a video expansion module on an audio phone or an audio expansion
module on a video phone.
The following table lists the phones and the number of key expansion modules that each model supports.
Table 96: Cisco IP Phones and Supported Cisco IP Phone 8800 Key Expansion Module
Supported Number of Key Expansion Modules and Buttons Cisco IP Phone Model
2; single LCD screen, 18 line keys, two pages, providing 72
buttons Cisco IP Phone 8851
3; single LCD screen, 18 line keys, two pages, providing 108
buttons Cisco IP Phone 8861
3; single LCD screen, 18 line keys, two pages, providing 108
buttons, Cisco IP Phone 8865
Table 97: Cisco IP Phones and Supported Cisco IP Phone 8851/8861 Key Expansion Module and Cisco IP Phone 8865 Key Expansion Module
Supported Numbers of Key Expansion Modules and Buttons Cisco IP Phone Model
2; dual LCD screen, 14 line keys, two pages, providing 56 buttons Cisco IP Phone 8851
3; dual LCD screen, 14 line keys, two pages, providing 84 buttons Cisco IP Phone 8861
3; dual LCD screen, 14 line keys, two pages, providing 84 buttons Cisco IP Phone 8865
Key Expansion Module Power Information
If you use a key expansion module 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 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
Table 98: Power-Supply Compatibility for Cisco IP Phone 8800 Key Expansion Module
Cisco IP Phone Power Cube 4 802.3at PoE 802.3af Power over Ethernet
(PoE) Configuration
Yes Yes Yes 8851 with 1 key expansion
module
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
476
Cisco IP Phone Accessories
Key Expansion Module Power Information