FS is a US company. They are a fairly reasonable option for third party networking equipment. We run a ton of their SPF+ transceivers in our racks, as they're s

FS is a US company. They are a fairly reasonable option for third party networking equipment. We run a ton of their SPF+ transceivers in our racks, as they're significantly cheaper than OEM parts and indistinguishable in operation and we've had excellent support the handful of times we needed it over the years.