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

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

What it is

SFP-10G-LR-S is a 10 Gigabit SFP+ optical transceiver designed for long-reach links over single-mode fiber (SMF). It’s a common choice for WAN, campus backbone, or data-center uplinks where 10 km+ reach is needed without moving up to CFP/QSFP optics.

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

• Long-reach 10G over SMF
  Up to ~10 km on single-mode fiber — ideal for building-to-building or data center spine/aggregation links.

• Standard 10G optical lane
  Works in any compatible SFP+ port that supports 10GBASE-LR (switches, routers, firewalls, servers).

• Lower cost than “tunable” optics
  Fixed wavelength LR optics are simple, reliable, and widely supported.

• Digital diagnostics (DOM/DDM)
  Let you read power, temperature, and other health stats from the transceiver.

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

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

Media / environment

• Indoor campus, data center, campus backbone, carrier POP links

Diagnostics

• DOM/DDM supported (optical monitoring)

Where it fits (and when to choose something else)

Perfect for:

• Data center spine/aggregation links with SMF runs up to ~10 km

• Campus backbone or building-to-building fiber links

• Any 10G link that needs SMF reach and duplex LC connectivity

Choose something else if:

• Your runs are short and multimode → use 10GBASE-SR (MMF) optics

• You need 10GBASE-ER for >10 km single-mode links

• You’re doing very short in-rack hops → DAC/AOC 10G cables are cheaper

TL;DR

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