I've been using various forms of passive WDM for years. I have a couple different projects on my plate that require me to look at the next level of platform. In some projects, I'll be looking for needing to have someone long distances of glass without any electronics. Some spans could be over 60 miles. In some projects, I'll need to transport multiple 100-gig waves. What is the landscape like between basic passive and something like a 30 terabit Ciena? I know of multiple vendors in that space, but I like to learn more about what features I need and what features I don't need from somewhere other than the vendor's mouth. Obviously, the most reliability at the least cost as well. Thanks. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com