Cisco 7925G Administration Guide - Page 40

Components of the VoIP Wireless Network Chapter 2 Overview of the VoIP Wireless Network Table 2-4 Supported Networking Protocols Networking Protocol Purpose Usage Notes Cisco Discovery Protocol (CDP) Device-discovery protocol that runs on all Cisco-manufactured equipment. Using CDP, a device can advertise its existence to other devices and receive information about other devices in the network. Cisco Unified IP Phones use CDP to communicate information such as auxiliary VLAN ID, per-port power management details, and QoS configuration information with the Cisco Catalyst switch. Dynamic Host Configuration Protocol (DHCP) Dynamically allocates and assigns an IP address to network devices. DHCP enables an IP phone to connect to the network and become operational without the administrator assigning an IP address or configuring additional network parameters. DHCP is enabled by default. If disabled, you must manually configure the IP address, subnet mask, gateway, and an TFTP server on each phone locally. Use DHCP custom option 150. With this method, you configure the TFTP server IP address as the option value. For additional supported DHCP configurations, refer to Cisco Unified Communications Manager System Guide. IP Messaging protocol that addresses To communicate using IP, network and sends packets across the devices must have an assigned IP network. address, subnet, and gateway. IP addresses, subnet, and gateway identifications are automatically assigned if you are using the Cisco Unified IP Phone with DHCP. If you are not using DHCP, you must manually assign these properties to each phone locally. Real-Time Control Protocol (RTCP) Used with the RTP protocol to Cisco Unified IP Phones use the provide control over the transporting RTCP protocol to allow monitoring of real-time data, such as interactive of the data delivery and minimal voice and video, over data networks. control and identification functionality. RTP Standard for transporting real-time Cisco Unified IP Phones use the RTP data, such as interactive voice and protocol to send and receive video, over data networks. real-time voice traffic from other phones and gateways. SCCP Uses Cisco-proprietary messages to communicate between IP devices and Cisco Unified Communications Manager, Release 4.x, 5.1, 6.0, 6.1, and 7.0. Cisco Unified IP Phones use SCCP protocol for VoIP call signaling and enhanced features such as Message Waiting Indication (MWI). 2-10 Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1) OL-15984-01