Cisco 7925G - Unified Wireless IP Phone VoIP User Manual

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Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1)
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Chapter 2 Overview of the VoIP Wireless Network
Components of the VoIP Wireless Network
Related Topic
Understanding the Phone Startup Process, page 3-17
Interacting with the Dynamic Host Configuration Protocol Server
Dynamic Host Configuration Protocol (DHCP) is a communications protocol that lets network
administrators manage and automate the assignment of IP addresses in a network. When an IP device is
added to the network, it must have a unique IP address. 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 Unified Wireless IP Phone 7925G uses the DHCP scope
settings in the DHCP server to perform the phone provisioning bootup process. You must configure the
settings of the DHCP server in the Cisco Unified
Communications Manager network.
The DHCP scope settings include the following:
• TFTP servers
• 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 Unified Wireless
IP
Phone 7925G, as shown in Table 2-5.
If DHCP is disabled, the Cisco Unified Wireless IP Phone 7925G uses the following network settings in
Table 2-6 to perform the phone provisioning bootup process. You must configure these static parameters
for each Cisco Unified Wireless IP Phone 7925G.
Ta b l e 2-5 DHCP Settings Priority
Priority DHCP Settings
1st DHCP option 150
2nd DHCP option 66
3rd SIADDR
4th ciscoCM1
Ta b l e 2-6 Static IP Addresses When DHCP is Disabled
Static Setting Description
IP Address IP address, the unique identifier assigned by the system administrator
for the phone.
Subnet Mask Used to partition the IP address into a network identifier and host
identifier so TCP/IP can distinguish between them.
Default Router 1 Identifies the gateway that provides connectivity to the IP network
beyond the subnet to which the phone belongs.

Cisco 7925G - Unified Wireless IP Phone VoIP Specifications

General

Brand	Cisco
Model	7925G - Unified Wireless IP Phone VoIP
Category	IP Phone
Language	English