Usb Port Information; Cisco Ip Phone 8800 Series Multiplatform Phones Administration Guide - Cisco 8851 Administration Manual

• Apply ferrites or other such devices on the cables for the external device.
Cisco cannot guarantee the performance of external devices, cables, and connectors.
In European Union countries, use only external speakers, microphones, and headsets that are fully compliant
Caution
with the EMC Directive [89/336/EC].

USB Port Information

The Cisco IP Phones 8851, 8861, and 8865 support a maximum of five devices that connect to each USB
port. Each device that connects to the phone is included in the maximum device count. For example, your
phone can support five USB devices on the side port and five more standard USB devices on the back port.
Many third-party USB products count as multiple USB devices; for example, a device containing a USB hub
and headset can count as two USB devices. For more information, see the USB device documentation.
• Unpowered hubs are not supported, and powered hubs with more than four ports are not supported.
Note
• USB headsets that connect to the phone through a USB hub are not supported.
Each key expansion module connects to the phone counts as a USB device. If three key expansion modules
are connected to the phone, these count as three USB devices.

Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide

USB Port Information
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