USB Charging
The Cisco IP Phones 8851 and 8861 allow users to charge personal mobile devices using the phone USB
ports. The following table describes the USB charging specifications for personal mobile devices.
Cisco IP Phone 8861Cisco IP Phone 8851
Yes (802.3af)Yes (802.3af)Smart phone charging
Yes (802.3at)No (no back USB port)Tablet charging
The side USB port on the Cisco IP Phones 8851 and 8861 only supports slow charging with limited
500mA/2.5W maximum power.
The back USB port on the Cisco IP Phone 8861 supports fast charging up to 2.1A/10.5W maximum power.
When the Cisco IP Phone 8861 is using PoE with an 802.3af switch, the back USB port can only work in
slow-charging mode due to the limited power supply from 802.3af switch.
Note
Wi-Fi Client
The Cisco IP Phone 8861 supports campuses with 802.11a/b/g/n/ac WLAN enabled. Customers need to ensure
that 12 Mbps is enabled in the WLAN Controller or Access Point (AP) data rate configuration.
We recommend that customers use 5 GHz as there are more channels and less interferers with those frequencies.
The network administrator must ensure that the AP configuration conforms to local regulatory laws.Attention
Related Documentation
Use the following sections to obtain related information.
Cisco IP Phone 8800 Series Documentation
Refer to publications that are specific to your language, phone model and Cisco Unified Communications
Manager release. Navigate from the following documentation URL:
http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-8800-series/
tsd-products-support-general-information.html
Cisco IP Phone 8841, 8851, and 8861 Release Notes for Firmware Release 10.2(1)
4
Cisco IP Phone 8841, 8851, and 8861 Release Notes for Firmware Release 10.2(1)
USB Charging
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