Cisco Unified IP Phone and Telephony Networks• Phone and Telephony Networks Overview, page 1• Cisco Unified IP Communications Product Interactions, page 1• Cisco Unified IP Phone Power, page 4• Phone Configuration Files, page 6• Phone Startup Process, page 7• Cisco Unified Communications Manager Phone Addition Methods, page 8• Cisco Unified IP Phones and Different Protocols, page 11• Cisco Unified IP Phone MAC Address Determination, page 12Phone and Telephony Networks OverviewCisco Unified IP Phones enable you to communicate by using voice over a data network. To provide thiscapability, the IP Phones depend upon and interact with several other important Cisco Unified IP Telephonycomponents, including Cisco Unified Communications Manager.This chapter focuses on the interactions between the Cisco Unified IP Phone 6901 and 6911, Cisco UnifiedCommunications Manager, DNS and DHCP servers, TFTP servers, and switches. It also describes optionsfor powering phones.For related information about voice and IP communications, go to this URL:http://www.cisco.com/en/US/partner/products/sw/voicesw/index.htmlhttp://www.cisco.com/en/US/products/sw/voicesw/index.htmlCisco Unified IP Communications Product InteractionsTo function in the IP telephony network, the Cisco Unified IP Phone must be connected to a networkingdevice, such as a Cisco Catalyst switch. You must also register the Cisco Unified IP Phone with a CiscoUnified Communications Manager system before sending and receiving calls.Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 10.0 (SCCPand SIP)1