Cisco Systems CP6921CK9 manual Cisco Unified Communications Manager, System Guide, Related Topics

Chapter 1 An Overview of the Cisco Unified IP Phone

What Networking Protocols are Used?

Table 1-4	Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol		Purpose	Usage Notes
Internet Protocol (IP)		IP is a messaging protocol that addresses	To communicate using IP, network devices must
		and sends packets across the network.	have an assigned IP address, subnet, and gateway.
			IP addresses, subnets, and gateways identifications
			are automatically assigned if you are using the
			Cisco Unified IP Phone with Dynamic Host
			Configuration Protocol (DHCP). If you are not
			using DHCP, you must manually assign these
			properties to each phone locally.
Real-Time Transport		RTP is a standard protocol for transporting	Cisco Unified IP Phones use the RTP protocol to
Protocol (RTP)		real-time data, such as interactive voice	send and receive real-time voice traffic from other
		and video, over data networks.	phones and gateways.
Real-Time Control		RTCP works in conjunction with RTP to	RTCP is disabled by default, but you can enable it
Protocol (RTCP)		provide QoS data (such as jitter, latency,	on a per phone basis by using Cisco Unified
		and round trip delay) on RTP streams.	Communications Manager.
Skinny Client Control		SCCP includes a messaging set thatallows	Cisco Unified IP Phone 6921, 6941, and 6961 use
Protocol (SCCP)		communications between call control	SCCP, version 15 for call control.
		servers and endpoint clients such as IP
		Phones. SCCP is proprietary to Cisco
		Systems.
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.
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 Phone, 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, go to the Cisco TFTP chapter
			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.

Related Topics

•Understanding Interactions with Other Cisco Unified IP Telephony Products, page 2-1

•Understanding the Phone Startup Process, page 2-6

•Network Setup Menu, page 4-4

	Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
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