Optical Module • SFP / SFP+ • 1G / 10G • Single-mode & Multimode

SFP & SFP+ Optical Modules — universal compatibility, certified performance.

Our complete range of SFP optical modules and SFP+ covers all network architectures: single-mode, multimode, BiDi simplex and RJ45 copper. Compatible with Cisco, Ubiquiti, Freebox Ultra/Delta, Intel, HP, TP-Link, Netgear, Juniper, Huawei and many more. Plug & play, no configuration required.

Choose my module Compatibility table
SFP 1.25 Gbps SFP+ 10 Gbps BiDi simplex Multi-brand plug & play
ELFCAM SFP and SFP+ optical modules
SFP/SFP+ modules for switches, converters, routers and fiber boxes — guaranteed multi-brand compatibility.
Contents
Categories Highlights Choose Compatibility FAQ

Optical module categories

Choose by connector type, speed and fiber mode. Each module is plug & play and multi-brand compatible.

SFP SC Simplex (1G BiDi)

Single-mode BiDi modules with SC connector. Work in pairs (Tx/Rx on a single fiber). Ideal for ELFCAM converters and long-distance links up to 20 km.

SFP LC Simplex (1G BiDi)

Single-mode BiDi modules with LC connector. A single fiber is enough thanks to WDM multiplexing. Reach up to 80 km depending on the model.

SFP LC Duplex (1G)

1 Gbps modules with LC duplex connector — single-mode (OS2) or multimode (OM1–OM4). The most common format for switches and routers.

10G SFP+ LC Duplex

High-performance 10 Gbps modules in LC duplex. Single-mode (up to 10 km) or multimode (up to 300 m). For 10G switches, NAS and fiber backbone.

10G SFP+ Simplex (BiDi)

10 Gbps BiDi modules — a single fiber thanks to WDM multiplexing. Save on cabling while keeping 10G performance.

SFP / SFP+ RJ45 (Copper)

RJ45 copper modules to connect an SFP/SFP+ port directly via Ethernet. Ideal for Freebox Ultra/Delta and short-distance conversions (up to 30 m).

Highlights

Why choose ELFCAM modules

  • Universal compatibility: tested and validated on Cisco, Ubiquiti, Freebox Ultra, Intel, HP, TP-Link, Netgear, Juniper, Huawei, Mikrotik and many more.
  • Plug & play: no configuration, no firmware — direct insertion into the SFP/SFP+ port.
  • Class 1 certified laser: industrial-grade optical components, compliant with eye safety standards.
  • Built-in DDM / DOM: real-time monitoring of optical power, temperature and voltage directly from your switch.
  • Extended warranty: fast replacement in case of manufacturing defect.
InsertionPlug & play
DetectionAuto-negotiation
Link1G / 10G active

Typical use cases

  • Home fiber box: RJ45 module in the Freebox Ultra/Delta to connect a switch or NAS.
  • Enterprise network: single-mode LC duplex modules to interconnect switches, routers and servers.
  • Fiber backbone: 10G SFP+ modules for inter-building and high-capacity links.
  • Video surveillance: BiDi simplex modules to save fiber while maintaining performance.
  • Data center: short-distance multimode modules for rack-to-rack interconnections.
Recommended for
  • ELFCAM fiber switch
  • Fiber converter
  • Freebox Ultra / Delta
  • Synology / QNAP NAS
Available reaches
  • 30 m — RJ45 copper
  • 300–550 m — multimode
  • 10–20 km — standard single-mode
  • 80 km — long-reach single-mode

Choose the right optical module

Quick selection based on your equipment, connector and distance to cover.

1) Which connector on your equipment?

SC connector
  • ELFCAM converters
  • Legacy fiber equipment
  • BiDi simplex format
See SFP SC
LC connector
  • Modern switches
  • Routers, NAS, servers
  • Duplex or simplex BiDi
See SFP LC

2) Which speed and which distance?

1G — short

Multimode, ≤ 550 m. Office, server room.

1G / 10G — long

Single-mode, 10–80 km. Inter-building, campus.

RJ45 copper

≤ 30 m. Freebox, SFP→Ethernet conversion.

Decision matrix (30 seconds)

  • Freebox Ultra / Delta → RJ45 (ref 15580) or LC Duplex multimode
  • ELFCAM converter (SC) → SFP SC Simplex (ref 455, 2127, 2155)
  • 1G switch with SFP port → SFP LC Duplex (ref 6598, 6603)
  • 10G switch with SFP+ port → SFP+ LC Duplex (ref 640, 17690)
  • Long link (> 10 km) → Single-mode LC 20 km (ref 16609) or 80 km (ref 2591)
  • Fiber saving (10G) → SFP+ BiDi Simplex (ref 28007+)

Compatibility table (models & connectors)

Quickly match the right module to the right fiber and connector type. Scrollable table.

REF Type Speed Fiber Lambda Reach Connector Fiber std Compatibility
455 SFP SC BiDi 1G Single-mode 1310/1550 nm 20 km SC/APC OS2 ELFCAM converters, Cisco, Ubiquiti
2127 SFP SC BiDi 1G Single-mode 1310/1550 nm 20 km SC/UPC OS2 ELFCAM converters, Cisco, Ubiquiti
2155 SFP SC BiDi 1G Single-mode 1310/1550 nm 20 km SC/APC OS2 ELFCAM converters, Cisco, Ubiquiti
2551 SFP LC BiDi 1G Single-mode 1310/1550 nm 20 km LC/UPC OS2 Cisco, Ubiquiti, TP-Link, Netgear, Mikrotik
2591 SFP LC BiDi 1G Single-mode 1550 nm 80 km LC/UPC OS2 Cisco, Ubiquiti, Juniper, Huawei
6598 SFP LC Duplex 1G Single-mode 1310 nm 10 km LC/UPC OS2 Cisco, Ubiquiti, HP, TP-Link, Netgear, D-Link
6603 SFP LC Duplex 1G Multimode 850 nm 550 m LC/UPC OM1–OM4 Cisco, Ubiquiti, HP, Intel, Netgear
16609 SFP LC Duplex 1G Single-mode 1310 nm 20 km LC/UPC OS2 Cisco, Ubiquiti, HP, TP-Link, Juniper
640 SFP+ LC Duplex 10G Single-mode 1310 nm 10 km LC/UPC OS2 Cisco, Ubiquiti, Intel, HP, Juniper, Huawei
17690 SFP+ LC Duplex 10G Multimode 850 nm 300 m LC/UPC OM3/OM4 Freebox Ultra, Cisco, Intel, HP, Aruba
2583 SFP+ LC Duplex 10G Multimode 850 nm 300 m LC/UPC OM3/OM4 Cisco, Intel, HP, Ubiquiti, Netgear
15580 SFP+ RJ45 10G Copper — 30 m RJ45 — Freebox Ultra/Delta, Cisco, Ubiquiti, Intel, HP, Aruba

FAQ — Optical Modules

Quick answers to the most frequently asked questions.

1What's the difference between SFP and SFP+?
SFP supports up to 1.25 Gbps, while SFP+ goes up to 10 Gbps. Both use the same physical format, but an SFP port cannot accommodate an SFP+ module (except for backward compatibility on some switches). An SFP+ port, however, accepts SFP 1G modules.
2Simplex (BiDi) or Duplex: how to choose?
  • Simplex (BiDi): a single fiber is enough — Tx and Rx on different wavelengths. Saves fiber, works in pairs (A + B).
  • Duplex: two fibers (one per direction). Easier to diagnose, compatible with most standard equipment.
3Which module for my Freebox Ultra or Delta?
The Freebox Ultra has an SFP+ port. You can insert an RJ45 (ref 15580) module for a direct Ethernet connection, or an SFP+ multimode (ref 17690) module for a short-distance fiber link. The Freebox Delta uses a standard SFP port.
4Are ELFCAM modules compatible with Cisco / Ubiquiti / TP-Link?
Yes. Our modules are coded for multi-brand compatibility: Cisco, Ubiquiti, TP-Link, Netgear, HP, Intel, Juniper, Huawei, D-Link, Mikrotik, ZTE, Aruba. No configuration or reprogramming is required.
5Single-mode or multimode: which one to choose?
  • Multimode (850 nm): short distance (≤ 550 m). Cheaper, ideal for connections within a building.
  • Single-mode (1310/1550 nm): long distance (10–80 km). Required for inter-building or campus links.
Check the type of fiber already installed (OM3/OM4 = multimode, OS2 = single-mode).
6What is DDM / DOM?
DDM (Digital Diagnostic Monitoring) lets you monitor in real time the module's Tx/Rx optical power, temperature and voltage directly from your switch interface. All ELFCAM modules include this feature.
7What is the maximum reach of an SFP module?
It depends on the fiber type and wavelength:
  • RJ45 copper: 30 m
  • Multimode 850 nm: 300–550 m
  • Single-mode 1310 nm: 10–20 km
  • Single-mode 1550 nm: up to 80 km
8Do BiDi modules need to be paired?
Yes. BiDi modules work in pairs: a module A (Tx 1310 nm / Rx 1550 nm) and a module B (Tx 1550 nm / Rx 1310 nm). Both ends of the link must use complementary wavelengths.
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