Cisco 9971 Administration Guide

• Ensure the Don’t Fragment (DF) bit is not set on the server, network, or IP phone VPN tunnel.
Set Up Cisco VXC VPN
You must enter the Alternate TFTP and TFTP server fields when you configure an off-premises phone for
SSL VPN to ASA using a built-in client.
The Cisco VXC clients require no configuration to support the VPN. All VPN configuration is performed
for the phone only.
Note
Procedure
Step 1
To set up the Cisco VXC VPN feature, set up the VPN feature for the attached IP phone in Cisco Unified
Communications Manager Administration. Use the submenus in Advanced Features > VPN.
Step 2
To enable the Cisco VXC VPN feature, populate the Enable VXC VPN for MAC field using one of the
following configuration windows:
•
Phone Configuration window (Device > Phone)
•
Common Phone Profile window (Device > Device Settings > Common Phone Profile)
•
Enterprise Phone Configuration window (System > Enterprise Phone Configuration)
Cisco VXC VPN Descriptions
The following table describes the Cisco VXC VPN fields.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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Set Up Cisco VXC VPN

Cisco 9971 Specifications

General

Resolution	640 x 480 pixels
Programmable Line Keys	5
Protocols	SIP, SCCP
Wi-Fi	802.11a/b/g
Weight	3.5 lbs
Display	5-inch color LCD
Audio	Wideband audio, G.722 codec support
USB Ports	2 x USB 2.0
Ethernet Ports	2
PoE	Yes (802.3af)
Video	H.264
Network Interfaces	10/100/1000 Ethernet
Codecs	G.711, G.722, G.729a, G.729ab, iLBC
Power Options	PoE
Headset Port	Dedicated headset port
Speakerphone	Full-duplex speakerphone