Filter
Top Products
Chapter 2 Preparing to Install the Cisco Wireless IP Phone 7920 on Your Wireless Network
Interactions with Components in the VoIP Network
2-8
Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 3.3 or Later
OL-3930-02
Interacting with Cisco CallManager
The Cisco Wireless IP Phone 7920 uses Cisco CallManager for handling and
routing calls. Cisco CallManager manages the components of the IP telephony
system—the phones, access gateways, and the resources necessary for such
features as call conferencing and route planning. Cisco recommends that you use
Cisco CallManager Release 3.3(3) SR1 or later for wireless voice deployments.
For information about configuring Cisco CallManager to work with the IP devices
described in this chapter, refer to Cisco CallManager Administration Guide and
Cisco CallManager System Guide.
Related Topics
• Configuring Telephony Features Using Cisco CallManager Administration,
page 7-2
• Interacting with the DHCP Server, page 2-8
Interacting with the DHCP Server
DHCP (Dynamic Host Configuration Protocol) is a communications protocol that
lets network administrators manage and automate the assignment of Internet
Protocol (IP) addresses in a network. When an IP device is added to the network,
a unique IP address must be assigned to it. Without DHCP, the IP address must be
entered manually at each device. DHCP allocates IP addresses dynamically and
reuses IP addresses when devices no longer need them.
If DHCP is enabled in the network, the Cisco Wireless IP Phone 7920 uses the
DHCP scope settings in the DHCP server to perform the phone provisioning
bootup process. The administrator must configure the settings of the DHCP server
in the Cisco CallManager network.
The DHCP scope settings include the following:
• TFTP server
• DNS server IP address (optional unless using host names)
• Pool and range of the subnet mask, IP address, and gateway
The priority of the DHCP settings for the TFTP server is unique to the
Cisco Wireless IP Phone 7920, which is set as follows.