In European Union countries, use only external speakers, microphones, and headsets that are fully compliant
with the EMC Directive [89/336/EC].
Caution
USB Port Information
The Cisco Unified IP Phone supports 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 (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. The Cisco
Unified IP Phone 8961 does not contain a back USB 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.
Note
•
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.
•
The Cisco Unified Video Camera that connects to the phone through a USB hub is not supported.
Phone Configuration Files
Configuration files for a phone are stored on the TFTP server and define parameters for connecting to Cisco
Unified Communications Manager. In general, any time you make a change in Cisco Unified Communications
Manager that requires the phone to be reset, a change is automatically made to the phone configuration file.
Configuration files also contain information about which image load the phone should be running. If this
image load differs from the one currently loaded on a phone, the phone contacts the TFTP server to request
the required load files.
If you configure security-related settings in Cisco Unified Communications Manager Administration, the
phone configuration file will contain sensitive information. To ensure the privacy of a configuration file, you
must configure it for encryption. For more information, see the documentation for your particular Cisco
Unified Communications Manager release. A phone requests a configuration file whenever it resets and
registers with Cisco Unified Communications Manager.
A phone accesses a default configuration file named XmlDefault.cnf.xml from the TFTP server when the
following conditions exist:
•
You have enabled autoregistration in Cisco Unified Communications Manager
•
The phone has not been added to the Cisco Unified Communications Manager database
•
The phone is registering for the first time
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0
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USB Port Information
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