Cisco Systems 8.6 IPv6 Support on Cisco Unified IP Phones, Communications Manager Security Guide

Chapter 1 An Overview of the Cisco Unified IP Phones

What Networking Protocols are Used?

Table 1-2	Supported Networking Protocols on the Cisco Unified IP Phones (continued)
Networking Protocol		Purpose	Usage Notes
Session Initiation Protocol		SIP is the Internet Engineering Task Force	Like other VoIP protocols, SIP is designed to
(SIP)		(IETF) standard for multimedia	address the functions of signaling and session
		conferencing over IP. SIP is an	management within a packet telephony network.
		ASCII-based application-layer control	Signaling allows call information to be carried
		protocol (defined in RFC 3261) that can be	across network boundaries. Session management
		used to establish, maintain, and terminate	provides the ability to control the attributes of an
		calls between two or more endpoints.	end-to-end call.
			You can configure the Cisco Unified IP Phones to
			use either SIP or Skinny Client Control Protocol
			(SCCP). Cisco Unified IP Phones do not support the
			SIP protocol when the phones are operating in IPv6
			address mode.
Skinny Client Control		SCCP includes a messaging set that allows	Cisco Unified IP Phones use SCCP for call control.
Protocol (SCCP)		communications between call control	You can configure the Cisco Unified IP Phone to
		servers and endpoint clients such as IP	use either SCCP or Session Initiation Protocol
		Phones. SCCP is proprietary to Cisco.	(SIP).
Transmission Control		TCP is a connection-oriented transport	Cisco Unified IP Phones use TCP to connect to
Protocol (TCP)		protocol.	Cisco Unified Communications Manager and to
			access XML services.
Transport Layer Security		TLS is a standard protocol for securing	When security is implemented, Cisco
(TLS)		and authenticating communications.	Unified IP Phones use the TLS protocol when
			securely registering with Cisco
			Unified Communications Manager.
			For more information, see Cisco Unified
			Communications Manager Security Guide.
Trivial File Transfer		TFTP allows you to transfer files over the	TFTP requires a TFTP server in your network,
Protocol (TFTP)		network.	which can be automatically identified from the
		On the Cisco Unified IP Phones, TFTP	DHCP server. If you want a phone to use a TFTP
			server other than the one specified by the DHCP
		enables you to obtain a configuration file
			server, you must manually assign the IP address of
		specific to the phone type.
			the TFTP server by using the Network
			Configuration menu on the phone.
			For more information, see Cisco TFTP in the Cisco
			Unified Communications Manager System Guide.
User Datagram Protocol		UDP is a connectionless messaging	Cisco Unified IP Phones transmit and receive RTP
(UDP)		protocol for delivery of data packets.	streams, which utilize UDP.

IPv6 Support on Cisco Unified IP Phones

The Cisco Unified IP Phones uses the internet protocol to provide voice communication over the network. Because it uses a 32-bit address, Internet Protocol version 4 (IPv4) cannot meet the increased demands for unique IP addresses for all devices that can connect to the internet. Internet Protocol version

Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)

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