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Cisco ASDM User Guide
OL-16647-01
Chapter 19 Adding Global Objects
Phone Proxy
Step 5 In the TFTP Server Settings list, do one of the following:
• To add a new TFTP server for the Phone Proxy, click Add. The Add TFTP Server dialog box opens.
See Add/Edit TFTP Server, page 19-27.
• To select an existing TFTP server, select one from the drop-down list.
Note The TFTP server must reside on the same interface as the Cisco Unified Call Manager. Additionally, If
NAT is configured for the TFTP server, the NAT configuration must be configured prior to configuring
the specifying the TFTP server while creating the Phone Proxy instance.
Step 6 Specify the CTL File to use for the Phone Proxy by doing one of the following:
• To use an existing CTL File, check the Use the Certificate Trust List File generated by the CTL
instance check box.
• To create a new CTL file for the Phone Proxy, click the link Generate Certificate Trust List File. The
Create a Certificate Trust List (CTL) File pane opens. See Creating a CTL File, page 19-28.
Step 7 To specify the security mode of the CUCM cluster, click one of the following options in the CUCM
Cluster Mode field:
• Non-secure—Specifies the cluster mode to be in nonsecure mode when configuring the Phone Proxy
feature.
• Mixed—Specifies the cluster mode to be in mixed mode when configuring the Phone Proxy feature.
Step 8 To configure the idle timeout after which the secure-phone entry is removed from the Phone Proxy
database (the default is 5 minutes), enter a value in the format hh:mm:ss.
Since secure phones always request a CTL file upon bootup, the Phone Proxy creates a database that
marks the phone as secure. The entries in the secure phone database are removed after a specified
configured timeout. The entry timestamp is updated for each registration refresh the Phone Proxy
receives for SIP phones and KeepAlives for SCCP phones.
Specify a value that is greater than the maximum timeout value for SCCP KeepAlives and SIP Register
refresh. For example, if the SCCP KeepAlives are configured for 1 minute intervals and the SIP Register
Refresh is configured for 3 minutes, configure this timeout value greater than 3 minutes.
Step 9 To preserve Call Manager configuration on the IP phones, check the Preserve the Call Manager’s
configuration on the phone... When this option is uncheck, the following service settings are disabled on
the IP phones:
• PC Port
• Gratuitous ARP
• Voice VLAN access
• Web Access
• Span to PC Port
Step 10 To configure an HTTP proxy for the Phone Proxy feature that is written into the IP phone's configuration
file under the <proxyServerURL> tag, do the following:
a. Check the Configure a http-proxy which would be written into the phone’s config file... check box.
b. In the IP Address field, type the IP address of the HTTP proxy and the listening port of the HTTP
proxy.