Cisco UNIFIED 9971, Deployment Manual, Page: 52 / 104

Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide
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Button value is true, then in "Off Hook Dialing/RingingOut/Connected" state, a new Call
Windows will be brought out after Release Button is pressed. If "Revert To All
Calls" feature was enabled, it should be active first before "Dial Tone" feature.
Hide Video By Default This field provides an additional flexibility of hiding video window by default if
"Hide Video By Default" is enabled.
Background Image This parameter specifies the default wallpaper file. Only the administrator
disables end user access to phone wallpaper list, could this parameter take effect.
Simplified New Call UI
This parameter specifies if use simplified call UI style when the phone is Off-
hook. Those who like the New Call Window can continue to use that at the same
time that those who prefer the Simplified New Call Session can use that method.
Enable VXC VPN for MAC This field indicates whether the phone will establish the VXC VPN Tunnel for
the specified MAC address used by the VXC device connecting to Phone's PC-
Port. When this field is blank, the phone will not establish VXC VPN tunnel.
When this field is one broadcast MAC address (i.e. FFFFFFFFFFFF), the phone
will establish VXC VPN tunnel and allow any VXC device to access the tunnel.
When this field is one non-broadcast MAC address, the phone will establish VXC
VPN tunnel and only allow the specified VXC device's MAC address to access
the tunnel. By default, this field is blank.
VXC VPN Option This field indicates how VXC VPN is supported. If "Dual Tunnel" is selected,
phone establishes two VPN tunnels, one for Phone and another for VXC device.
If "Single Tunnel" is selected, phone establishes only one VPN tunnel for phone
and VXC-device to share. Dual Tunnel: The default configuration will be the two
tunnel mode of operation to ensure the highest quality of service for the 89/99xx
voice and video services. Where uncompromised voice/video quality is required
the dual VPN tunnel solution is recommended. Through the use of two VPN
tunnels the host Cisco IP Phone is able to provide prioritization of its CPU and
memory resources to the data associated with the Phones Voice/video functions
over that of the data associated with the VXC VPN tunnel. This approach will
require two manual login entries (dependent on security parameters), one for
Phone's Voice/Video VPN and another for VXC VPN. The two tunnel approach
also requires two VPN concentrator ports and two IP addresses adding potential
costs. Single Tunnel: A single VPN tunnel option is implemented for those
customers willing to trade off potential voice/video quality for a simplified
operating model. The solution consists of operating over a single VPN tunnel by
sharing the available 89/99xx processor and memory resources across the voice,
video and VDI services. The IP Phone will be unable to prioritize data handing of
one service over another. As a result, possible degradation of performance of the
IP Phones voice/video media handling and/or Phone UI functions due to IP
Phone CPU loading.
VXC Challenge This field indicates whether or not to challenge VXC device. 1) If "Challenge" is
selected, VXC device will be challenged. For "Single Tunnel" "VXC VPN
Option", Phone VPN tunnel will be torn down then pop-up "Phone VPN Sign In"
window for user to input credentials and re-establish Phone VPN tunnel. For
"Dual Tunnel" "VXC VPN Option", "VXC VPN Sign In" window will pop up
for user to input credentials and re-establish VXC VPN tunnel. 2) If "No
Challenge" is selected, VXC challenge will be bypassed. For "Single Tunnel"
"VXC VPN Option", VXC traffic will silently be permitted to go over phone
VPN without VXC challenge. For "Dual Tunnel" "VXC VPN Option",
credentials of Phone VPN tunnel will be reused to re-establish VXC VPN tunnel.
By default, the "Challenge" will be used.
VXC-M Servers VXC Management Server IP address list, separated with comma.