1. 33

  2. 3

    Great work and really nice to see how it can be done at home with some determination. I have to add that yes, fs.com is absolutely amazing.

    1. 2

      Fun stuff! How hard would it be to mux multiple ethernets over one fibre link? (even thinner!)

      1. 1

        mux multiple ethernets

        You mean like VLANs? Or some sort of ring topology network?

        1. 1

          You can use VLAN to get multiple virtual Ethernet networks, but it doesn’t give you any extra bandwidth.

          You can get additional bandwidth over a fiber by using more frequencies, but it’s probably not something you’d use at home. You get transceivers for different frequencies and hook them up to a CWDM or DWDM mux/demux filter. This device lets you take the different frequencies from several fiber pairs and run them over a single fiber. So in one end of the device you put in multiple fibers and in the other end you have just one fiber. Basically a fancy prism. This technology can be quite useful if you’ve got connections to multiple operators in a city and want to save on fiber rent.

          In the article he’s using a single-strand fiber and a bi-directional transceiver, using a pair of frequencies in the same strand. So in a sense he’s already running at twice the regular bandwidth for a strand. (I’m not sure a regular mux/demux filter even works with single-strand fibers). But if you have an existing installation with 1Gbps SFPs and want more bandwidth then you can just upgrade the SFPs to e.g. 10Gbps or 40Gbps.

        2. 2

          Interesting. This was a blind spot for me. It never crossed my mind to use its thickness (or lack thereof) in order to facilitate wiring between rooms. Mostly to blame is lack of awareness of these cheap copper<>fibre interface devices.

          I do wonder if these are compatible with standard transceivers, or else they must be bought in pairs.

          1. 2

            I’m probably going to run some network wiring though my house since I have gigabit fiber from ATT but cannot reliably use my available bandwidth over WiFi. I haven’t pulled cable since the buzzword was 10/100baseT so I’m pretty unaware of the state-of-the-art too.

            But searching for 1G switches shows there are some affordable midrange units that have 1 or 2 of these SFP slots that can accept a fiber module. It looks like you could also get a PCI network card with SFP that would let you have a single high speed fiber run from switch to desktop.