Cisco 7920 Administration Guide - Page 51

Chapter 2 An Overview of the Wireless Network Components of the VoIP Wireless Network Related Topics • Interacting with Cisco CallManager, page 2-17 • Components of the VoIP Wireless Network, page 2-5 • Wireless Network and Access Point Configuration, page 2-19 Interacting with Cisco CallManager Cisco CallManager is the call control component in the network that handles and routes calls for the Cisco Wireless IP Phone 7920. Cisco CallManager manages the components of the IP telephony system-the phones, access gateways, and the resources-for such features as call conferencing and route planning. You must use Cisco CallManager Release 3.3(3) SR1 or later for wireless voice deployments. Before Cisco CallManager can recognize a phone, it must register with Cisco CallManager and be configured in the database. For information about setting up phones in Cisco CallManager, see the "Configuring IP Phones in Cisco CallManager" section on page 3-6. You can find more information about configuring Cisco CallManager to work with the IP phones and IP devices in the Cisco CallManager Administration Guide and Cisco CallManager System Guide. Related Topics • Configuring Cisco Wireless IP Phones in Cisco CallManager, page 7-2 • Phone Configuration Files and Profile Files, page 2-17 Phone Configuration Files and Profile Files Configuration files for a phone define parameters for connecting to Cisco CallManager and are stored on the TFTP server. In general, any time you make a change in Cisco CallManager Administration that requires resetting the phone, the phone configuration file changes automatically. Configuration files also contain information about the correct image load for the phone. If this image load differs from the one currently loaded on a phone, the phone contacts the TFTP server to request the new image file. OL-7104-01 Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1 2-17