Troubleshooting Tips
The following tips apply to troubleshooting Cisco Unified IP Phone service applications:
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Microsoft Internet Explorer 5 or higher can display the XML source with its default style sheet.
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Understand that standard IP troubleshooting techniques are important for HTTP errors.
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Externally verify name resolution (Phone has DNS set).
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If DNS is suspected, use IP addresses in URLs.
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Browse the URL in question with Microsoft Internet Explorer or download and verify with another web browser.
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Use a logged telnet session to verify that the desired HTTP headers are returned (telnet to the server on port 80, and then enter: get /path/page).