I tried the following link but it does not work.
Hello there, thank you for your post.
The Developer network website is designed and focused for our development partners and questions related to coding and SDK usage (please see our Code of Conduct post). Pelco's Product Support teams are your best contact point for questions related to hardware, firmware, or installation issues - https://www.pelco.com/support.
However, I always want to help out as best I can, and it was pretty simple to find the firmware you're looking for (I think). A quick visit to www.pelco.com and a search in the upper right text field for "IXP31" pulled up several matches. I filtered the results by checking the "Firmware" checkbox on the left-hand column of the page, and located what I believe is what you need. Please try this link to visit those search results:
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