What is the failure rate or MTTF or MTBF for the W5500?
Neville, I assume you need this information to certify device usage within regulated railway industry. I am afraid you will not get this information here in the forum, and you will most probably require written certification from WIZnet. I advise you contact WIZnet using the phone - [url]http://www.shopwiznet.com/contact[/url] - start here, and you should get guidance what to do.
