1gb/s single mode single core SFP?

[clive.fulton]

Do Cisco make a 1000mb/s SFP that uses a single single-mode core for distances up to 10km? 

Like the old GLC-LH-SMD, but using a single core.

[Leo Laohoo]

1000BASE-BX-D/1000BASE-BX-U but Cisco-branded optics may not be compatible with all platform.  

[DanielP211]

Hello!

Do you mean OS1 single mode? Yes cisco still makes GLC-LH-SMD SFP's and they are compatible on all platforms catalyst/nexus...

BR

[M02@rt37 · Accepted solution]

Hello @clive.fulton 

Yes, Cisco offers a 1000BASE-BX SFP module, which uses a single strand of single-mode fiber for bidirectional communication. The most common model is the GLC-BX-D and GLC-BX-U, which are designed for distances up to 10 km. 

These modules are used in pairs, with one end using GLC-BX-D and the other using GLC-BX-U, enabling bidirectional data transmission over a single strand of single-mode fiber.