Ipv6 Support On Cisco Unified Ip Phones; Cisco Unified Ip Phone 7975G, 7971G-Ge, 7970G, 7965G, And 7945G Supported Features; Feature Overview - Cisco 7975G Software Manual

Cisco Unified IP Phone

IPv6 Support on Cisco Unified IP Phones

The Cisco Unified IP Phones use the Internet Protocol to provide voice communication over the network.
Because Internet Protocol version 4 (IPv4) uses a 32-bit address, it cannot meet the increased demands for
unique IP addresses for all devices that connect to the internet. Therefore, Internet Protocol version 6 (IPv6)
is an updated version of the current Internet Protocol. IPv6 uses a 128-bit address and provides end-to-end
security capabilities, enhanced Quality of Service (QoS), and increased number of available IP addresses.
The Cisco Unified IP Phone supports IPv4-only addressing mode, IPv6-only addressing mode, as well as an
IPv4/IPv6 dual stack addressing mode. In IPv4, you can enter each octet of the IP address on the phone in
dotted decimal notation; for example, 192.240.22.5. In IPv6, you can enter each octet of the IP address in
hexadecimal notation with each octet separated by a colon; for example, 2005:db8:0:1:ef8:9876:ba72:dc9a.
The phone truncates and removes leading zeros when it displays the IPv6 address.
Cisco Unified IP Phones support both IPv4 and IPv6 addresses transparently, so users can handle all calls on
the phone to which they are accustomed. Cisco Unified IP Phones with the Skinny Call Control Protocol
(SCCP) support IPv6. Cisco Unified IP Phones with SIP do not support IPv6.
Cisco Unified IP Phones do not support URLs with IPv6 addresses in the URL. This affects all IP Phone
Service URLs, such as services, directories, messages, help, and any restricted web services that require the
phone to use the HTTP protocol to validate credentials with the Authentication URL. If you configure Cisco
Unified IP Phone services for Cisco Unified IP Phones, you must configure the phone and the servers that
support the phone service with IPv4 addresses.
If you configure IPv6 Only as the IP Addressing Mode for phones that are running SIP, the Cisco TFTP
service overrides the IP Addressing Mode configuration and uses IPv4 Only in the configuration file.
For more information on IPv6 deployment in your Cisco Unified Communications network, see the "Internet
Protocol Version 6 (IPv6)" chapter in the Cisco Unified Communications Manager Features and Services
Guide and Deploying IPv6 in Unified Communications Networks with Cisco Unified Communications Manager,
located at http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/ipv6/ipv6srnd.html.
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and
7945G Supported Features
The Cisco Unified IP Phone functions much like a digital business phone and allows you to place and receive
telephone calls. In addition to traditional telephony features, the Cisco Unified IP Phone includes features
that enable you to administer and monitor the phone as a network device.
This section includes the following topics:

Feature Overview

Cisco Unified IP Phones provide traditional telephony functionality, such as call forwarding and transferring,
redialing, speed dialing, conference calling, and voice messaging system access. Cisco Unified IP Phones
also provide a variety of other features.
As with other network devices, you must configure Cisco Unified IP Phones to prepare them to access
Cisco Unified Communications Manager and the rest of the IP network. By using DHCP, you have fewer
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
IPv6 Support on Cisco Unified IP Phones
Communications Manager 9.0 (SCCP and SIP)
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