Cisco Cisco Virtualization Experience Client 2111 Administrator's Guide

E-2

Cisco Virtualization Experience Client 2112/2212 ICA Administration Guide for WTOS 7.0_214

OL-215152-01

Appendix E Cisco VXC 2112/2212 Power Considerations

PoE Power Negotiation

The following sections describe the power negotiation process on the Cisco VXC 2112 and
Cisco VXC 2212.

Cisco VXC 2112

When the Cisco VXC 2112 is powered using PoE, the firmware performs a one-time negotiation of PoE
power requirements at boot time and allocates the available power to the USB ports, power indicators,
and monitors, as described in

Cisco VXC 2112 Power Support, page E-2

. During normal operation, this

power allocation does not change.

Cisco VXC 2212

Unlike the Cisco VXC 2112, the Cisco VXC 2212 dynamically negotiates the PoE power allocation from
the PoE switch, and allocates the power to the attached devices when they are connected or disconnected.
Regardless of the total power that the Cisco VXC 2212 draws, the maximum power available to each
USB port is as described in

Cisco VXC 2212 Power Support, page E-3

Cisco VXC 2112 Power Support

Table E-1

describes the power configurations that are supported on the Cisco VXC 2112.

Note

•

IEEE 802.3af PoE does not support Cisco VXC 2112 configurations.

•

IEEE 802.3at PoE does not support the Cisco VXC 2112 if a Key Expansion Module is attached to
a Cisco Unified IP Phone 8961, 9951, or 9971.

Table E-1

Cisco VXC 2112 Power Support

Cisco VXC
2112 with:

Power
Source

USB

Monitor

Configuration

Port 1
keyboard

Port 2
mouse

Port 3
accessories

Port 4
accessories

DVI Port

VGA Port

8961

802.3at

Powered
(low)

Powered

Moderate

9951
without
camera

802.3at

Powered
(low)

Powered

Moderate

9951 with
camera

802.3at

Powered
(low)

Powered

Moderate

9971
without
camera

802.3at

Powered
(low)

Powered

Moderate