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@manawyrm@chaos.social

Post #1275558

2026-03-24 10:46 UTC

@ann3nova No-name china 1270nm/1330nm SMF BiDi SFP transceivers (12$ on Amazon) One side is my regular big Ethernet switch, which already had some SFP ports. The other side is a TP-Link SFP media converter (also 15$).

Replies (4)

  • @ann3nova@corteximplant.com 2026-03-24 10:47

    @manawyrm Heck yeah. I'm already making a list...thank you. :)

    Open ##1275559

  • @hcsch@chaos.social 2026-03-24 12:47

    @manawyrm @ann3nova do you need attenuators if you have an especially short run of cable between transceivers or can they just deal with ~full tx power arriving at their rx port? Unless I fumbled 100m of an OS2 cable (assuming 0.4dB/1km) with LC/APC connectors (assuming 0.2dB insertion loss) at both ends only attenuates to about 90% of the input power

    Open ##1275561

  • @funkylab@mastodon.social 2026-03-24 13:21

    @manawyrm @ann3nova hey, because energy for a year can quickly become more expensive than the hardware: do you happen to have a wall-power measurement for the media converter? (just an order of magnitude, not something detailed. I want to know whether we're talking 4€/a in electricity, or 50€/a.

    Open ##1275564

  • @nblr@chaos.social 2026-03-24 13:57

    @manawyrm @ann3nova Was about to say… if you use bidi, you can get some really cheap and armored yet reasonably flexible fibers from china that are superduper thin with a connector that fits through fairly small holes. Just ordered some for a project and they were en-par with prices for decent cat7 copper cable.

    Open ##1275574