The Cisco 10GBASE-ER Module supports a link length of up to 40 kilometers on standard single-mode fiber (SMF, G.652).
10GBASE-ER SFP+ Transceiver (SMF, 1550nm, 40km, LC, DOM)
The Cisco 10GBASE-ER Module supports a link length of up to 40 kilometers on standard single-mode fiber (SMF, G.652).
Cisco SFP-10G-ER, Fiber optic, 10000 Mbit/s, SFP+, LC, ER, 40000 m
Cisco SFP-10G-ER. SFP transceiver type: Fiber optic, Maximum data transfer rate: 10000 Mbit/s, Interface type: SFP+