Cisco Cisco Virtualization Experience Client 2212 Administrator's Guide
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Cisco Virtualization Experience Client 2112/2212 ICA Administration Guide for WTOS 7.0_214
OL-215152-01
A P P E N D I X
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Cisco VXC 2112/2212 Power Considerations
You can power the Cisco VXC 2112/2212 using a Cisco PWR-CUBE-4 power adapter or using standard
Power over Ethernet (PoE). This appendix describes the Cisco VXC configurations that are supported
by the IEEE 802.3af and IEEE 802.3at PoE standards, by Cisco Universal Power Over Ethernet (UPOE),
and by the Cisco PWR-CUBE-4 power adapter.
Power over Ethernet (PoE). This appendix describes the Cisco VXC configurations that are supported
by the IEEE 802.3af and IEEE 802.3at PoE standards, by Cisco Universal Power Over Ethernet (UPOE),
and by the Cisco PWR-CUBE-4 power adapter.
Cisco VXC 2112/2212 USB ports are compliant with USB 2.0 standard specifications to deliver a
maximum power level of 2.5 watts.
maximum power level of 2.5 watts.
Available Power on USB Ports
The USB ports on the Cisco VXC 2112/2212 operate at two power levels:
•
Low: 0.5 watts
•
High: 2.5 watts
USB ports that operate at the low-power level can only power USB devices that consume up to 0.5 watts
of power, and USB ports that operate at the high-power level can power USB devices that consume up
to 2.5 watts of power.
of power, and USB ports that operate at the high-power level can power USB devices that consume up
to 2.5 watts of power.
USB ports on the Cisco VXC 2112/2212 that operate at high power cannot individually power any
noncompliant USB accessory that requires more than 2.5 watts of power. To power devices that require
between 2.5 and 5 watts of power, you can use a USB Y cable to connect the accessory to USB port 3
and 4 of the client (when these are operating at high power).
noncompliant USB accessory that requires more than 2.5 watts of power. To power devices that require
between 2.5 and 5 watts of power, you can use a USB Y cable to connect the accessory to USB port 3
and 4 of the client (when these are operating at high power).
In addition, if no device is connected to a port, the Cisco VXC 2112/2212 cannot reallocate the available
power from this port to a device on another port. For example, if USB ports 1 and 2 are operating at low
power and no device is connected to port 2, the Cisco VXC 2112/2212 cannot redirect the power
allocated to port 2 to power a high-power device on port 1. In this case, the maximum power limit on
port 1 remains unchanged at 0.5 watts.
power from this port to a device on another port. For example, if USB ports 1 and 2 are operating at low
power and no device is connected to port 2, the Cisco VXC 2112/2212 cannot redirect the power
allocated to port 2 to power a high-power device on port 1. In this case, the maximum power limit on
port 1 remains unchanged at 0.5 watts.
Low-power USB devices (0.5 watts or less) are typically keyboards, mice, and joysticks, while
high-power USB devices (greater than 0.5 watts) are typically bus-powered cameras, hubs, and some
USB Flash drives.
high-power USB devices (greater than 0.5 watts) are typically bus-powered cameras, hubs, and some
USB Flash drives.
USB Hub Support
USB ports on the Cisco VXC 2112/2212 can power a USB hub provided the hub does not draw more
power than is available from the USB port to which it is connected (that is, 0.5 watts on low-power ports
or 2.5 watts on high-power ports).
power than is available from the USB port to which it is connected (that is, 0.5 watts on low-power ports
or 2.5 watts on high-power ports).