We have been very happy with Adva for our DWDM ring deployments with multiple drop-add points. As always proper engineering is critical to make sure you are taking into account the loss points from all the muxes, drop-adds, etc. Adva's sales / engineering / and subsequent support have been fantastic. Granted they aren't as cheap as the "low cost" ebay gear out of china but you are getting quality instead of a crapshoot of loss on each mux or drop/add you source. -----Original Message----- From: NANOG [mailto:nanog-bounces@nanog.org] On Behalf Of Colton Conor Sent: Tuesday, April 07, 2015 11:00 AM To: NANOG Subject: Low Cost CWDM or DWDM What vendors do you recommend for low cost CWDM / DWDM gear? Assume you have a fiber ring of 50 miles of fiber, and want to have POPs evenly spaced around the ring that you want to jump on and off of. Assume you only have 2 fiber strands to work with, but can obtain two more at an additional cost. Does 2 vs 4 fibers make a difference? The goal is to be able to offer multiple 10G connections to clients on the ring. All ethernet/wave no support for legacy SONET needed. How do you decide between CWDM vs DWDM? There are so many manufacturers that make transport gear I do not even know where to begin. Is there a guide to navigating through the big optical transport vendors? There are over 20 of them, and they all seem to do the same thing on paper.