You'd need something like this, which you can jumper over to the 10G port. https://www.fs.com/products/37016.html Cable to break it out. https://www.fs.com/products/68048.html Luke Ns -----Original Message----- From: NANOG <nanog-bounces@nanog.org> On Behalf Of Randy Bush Sent: Wednesday, January 08, 2020 1:10 PM To: North American Network Operators' Group <nanog@nanog.org> Subject: breakout *External Email: Use Caution* i am not a fiber/sfp/... geek, so clue bat please on my left, i have a delta 9020SL running arcos, female 40g qsfp on my right, i have incoming 10g 1310nm single mode from the seattle internet exchange. it is currently into a redstone 10g sfp NAME VALUE --------------------------------- SwPort 1 Status PRESENT Valid True Vendor FiberStore Model SFP-10GLR-31 Serial-Number G1804021292 Type SFP Module-Type 10G_BASE_SX Media-Type FIBER Module-Capability F_10G Length 255 Length-Description which i am swapping out for the delta 9020 so i am look at something such as https://www.fs.com/products/30900.html except i do not understand active/passive, AOC1M, etc thanks in advance randy