Cisco 9971 Standard User Manual page 15

USB port
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Each USB port supports a maximum of five supported and nonsupported devices that are
Note
connected to the phone. Each device connected to the phone is included in the maximum
device count. For example, your phone can support five USB devices (such as three Cisco
Unified IP Color Key Expansion modules, one hub, and one other standard USB device) on
the side port and five additional standard USB devices on the back port. (Many third-party
USB products count as several USB devices.) For more information, see your
system administrator.
Cisco Unified IP Phone 8961, 9951, and 9971 User Guide for Cisco Unified Communications Manager 8.0 (SIP)
Accessory connector, such as for connecting a Cisco Unified
IP Color Key Expansion Module
Your Phone
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