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Dynamic Host Configuration Protocol (DHCP) Server
Configuration
When a Cisco phone is plugged into the network, it retrieves an IP address from the DHCP server. It also
checks one of the options for the IP address of the Trivial File Transfer Protocol (TFTP) provisioning
server. If this option is not present, Cisco phones do not automatically upgrade their firmware, nor are
they automatically provisioned. For DHCP servers other than Windows® Server 2003 and SBS, consult
the appropriate documentation and complete the option configuration as indicated in Step 3.a.
To configure the DHCP server for Windows Server 2003/2008 and Small Business Server (SBS):
1. Select Start > Control Panel > Administrative Tools > DHCP.
2. Right-click the domain where you want the Cisco phones to be provisioned and select Set
Predefined Options.
3. Look for Option 150.
a. If Option 150 is not already defined, select Add.
Name
Data Type
Code
Description
b. If Option 150 is already defined
4. Select OK.
5. Right-click the Scope Options for the domain and select Configure Options.
6. Select the check box next to Option 150.
7. In the IP address field, enter the IP address of the UC server.
8. Select OK.
UC Server Provisioning Server
IP Address
150
UC Server Provisioning Server IP Address
If it is defined as an IP Address type and the value is the IP address for the UC
server, no action is required.
If it is not defined as an IP Address type and/or the value is not the IP address
for the UC server, automatic detection of the Cisco phones is not possible
unless this option can be changed as per the instructions in Step 3.a.
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