Specifications

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Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)
OL-21011-01
Chapter 1 An Overview of the Cisco Unified IP Phone
What Networking Protocols are Used?
IPv6 Support on Cisco Unified IP Phones
The Cisco Unified IP Phone uses the internet protocol to provide voice communication over the network.
Previous to Cisco Unified Communications Manager release 7.1, only the internet protocol version 4
(IPv4) was supported. Because it uses a 32-bit address, IPv4 cannot meet the increased demands for
unique IP addresses for all devices that can connect to the internet. Internet Protocol version 6 (IPv6) is
an updated version of the current Internet Protocol, IPv4. 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 an IPv6 address transparently, so users can handle all
calls on the phone to which they are accustomed. Cisco Unified IP Phones support the use of IPv6 only
with Cisco Unified Communications Manager release 7.1 and only with the Skinny Call Control Protocol
(SCCP).
Transmission Control
Protocol (TCP)
TCP is a connection-oriented transport
protocol.
Cisco Unified IP Phones use TCP to connect to
Cisco Unified Communications Manager and to
access XML services.
Transport Layer Security
(TLS)
TLS is a standard protocol for securing
and authenticating communications.
When security is implemented, Cisco
Unified
IP Phones use the TLS protocol when
securely registering with Cisco
Unified
Communications Manager.
For more information, refer to Cisco Unified
Communications Manager Security Guide.
Trivial File Transfer
Protocol (TFTP)
TFTP allows you to transfer files over the
network.
On the Cisco Unified IP Phone, TFTP
enables you to obtain a configuration file
specific to the phone type.
TFTP requires a TFTP server in your network,
which can be automatically identified from the
DHCP server. If you want a phone to use a TFTP
server other than the one specified by the DHCP
server, you must manually assign the IP address of
the TFTP server by using the Network
Configuration menu on the phone.
For more information, refer to Cisco TFTP in the
Cisco Unified Communications Manager System
Guide.
User Datagram Protocol
(UDP)
UDP is a connectionless messaging
protocol for delivery of data packets.
Cisco Unified IP Phones transmit and receive RTP
streams, which utilize UDP.
Table 1-2 Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol Purpose Usage Notes