Cisco 8800 Series Administration Guide

• Unpowered hubs are not supported, and powered hubs with more than four ports are not supported.
• USB headsets that connect to the phone through a USB hub are not supported.
Note
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
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About the Cisco IP Phone
USB Port Information

Cisco 8800 Series Specifications

General

Protocols	SIP, SCCP
Audio	Wideband audio
Connectivity	Gigabit Ethernet
Power	Power over Ethernet (PoE)
Bluetooth	Yes
USB	Yes
Codec Support	G.711, G.722, G.729, iLBC
Dimensions	Varies by model
Weight	Varies by model
Wi-Fi	Yes (varies by model)