SFP-10G-LR - Cisco 10GB SFP+ LR Module SMF

Cisco SFP-10G-LR — 10GBASE-LR SFP+ Single-Mode Transceiver (10 km)

What it is

SFP-10G-LR is a 10 Gigabit SFP+ optical transceiver designed for long-reach connectivity over single-mode fiber (SMF). It supports 10GBASE-LR signaling — the standard way to run 10 GbE up to ~10 km on SMF with a duplex LC connection.

Why buyers pick SFP-10G-LR (plain English)

• Long-reach 10G over single-mode fiber
  One of the most common optics for building-to-building, campus backbone, or data center aggregation links.

• Wide platform support
  Works in SFP+ ports on switches, routers, firewalls, and servers that support 10GBASE-LR.

• Simple, proven technology
  Not overly specialized — installs easily and interoperates broadly.

• Diagnostics support
  Lets you monitor optical power and health when the switch/router supports DOM/DDM.

60-second spec box (SFP-10G-LR)

Form factor

• SFP+ (10 GbE)

Standard / type

• 10GBASE-LR

Fiber type

• Single-mode fiber (SMF)

Connector

• Duplex LC

Wavelength

• 1310 nm

Max reach (typical)

• Up to ~10 km on SMF

Diagnostics

• DOM/DDM supported (optical monitoring)

Use case

• Long-reach 10G switch-to-switch

• Campus backbone fiber

• Closet-to-core or core-to-core uplinks

Where it fits (and when to choose something else)

Perfect for:

• Links between buildings or distant closets inside an enterprise

• Campus backbone or data center aggregation at 10 GbE

• Standard SMF runs where you want a tested, interoperable 10G module

Choose something else if:

• Your run is short on multimode fiber → use 10GBASE-SR

• You need longer than ~10 km → use 10GBASE-ER/ZR single-mode optics

• You want super-short direct cabling → 10G SFP+ DAC/AOC is cheaper

TL;DR

SFP-10G-LR is a 10GbE SFP+ long-reach single-mode optic:
1310 nm, duplex LC, up to ~10 km — the standard 10G module for single-mode fiber uplinks.