Cisco 9971 Administration Guide

Cisco VXC VPN Limitations and Restrictions
The following limitations and restrictions apply:
•
Only Layer 3 packets are tunneled. The Cisco VXC VPN feature does not support Layer 2 tunneling.
Therefore any Layer 2 capabilities are lost if the Cisco VXC connects through VPN.
•
The VPN client supports only IPv4 addresses.
•
The Cisco VXC VPN tunnel cannot be established over a Wi-Fi interface.
•
The Enable VXC VPN for MAC feature option is configurable only after you set up the phone VPN
parameters, including VPN Group and VPN Profile. This restriction exists because the Cisco VXC VPN
can share the same VPN parameters as the phone VPN.
•
All existing limitations and restrictions that apply to the phone VPN support apply to the Cisco VXC
VPN as well.
Do not turn on the VPN before a downgrade to a load previous to 9.2(3), or the phone will be unregistered.Note
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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Cisco VXC VPN Limitations and Restrictions

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