2.5G BiDi SFP Module, LC Single Mode Single Fiber Transceiver, 20km

Product Overview

The Luleey 2.5G BiDi SFP Module is designed for 2.5Gbps optical transmission over single mode single fiber. It uses BiDi wavelength division technology to transmit and receive optical signals through one LC simplex fiber connection, helping network engineers save fiber resources while upgrading from Gigabit to 2.5G optical links.

This 20km version is suitable for longer 2.5G single-fiber links than the 10km version. It is useful for building-to-building fiber links, campus networks, access networks, telecom rooms, small ISP networks, remote device connections, and 2.5G media converter deployment.

Unlike standard dual-fiber SFP modules that require two fiber cores, this LC BiDi SFP Module uses a 1310nm/1550nm wavelength pair over one single mode fiber. It must be used with the correct opposite wavelength module to create a normal BiDi link.

Compared with SC BiDi SFP modules, this LC version is better for compact SFP ports, high-density switches, routers, media converters, and equipment environments where LC fiber cabling is already used.

Luleey provides compatible coding options for different switch, router, and media converter platforms, helping users deploy stable 2.5G single-fiber optical links in real network environments.

Features

• 2.5G BiDi SFP Module for single-fiber optical transmission
• Supports 2.5Gbps data rate
• LC simplex connector for compact fiber deployment
• Single mode fiber transmission
• 1310nm / 1550nm wavelength pair
• BiDi technology helps save fiber cores
• Supports up to 20km transmission over single mode fiber
• Hot-pluggable SFP form factor
• Suitable for 2.5G switches, routers, access equipment, and media converters
• LC connector design for high-density SFP equipment environments
• Compatible coding options for major network equipment brands
• Suitable for upgrading selected 1G fiber links to 2.5G
• Factory tested by Luleey for stable optical performance

Applications

• 2.5G Ethernet Fiber Links
• Single Fiber Network Deployment
• 2.5G Switch Uplink
• Router-to-Switch Fiber Connection
• 2.5G Media Converter Deployment
• Building-to-Building Fiber Links
• Campus Fiber Networks
• Telecom Room Fiber Access
• Small ISP Access Networks
• Enterprise Fiber Extension
• Broadband Access Extension
• Fiber Resource Saving Projects
• Long-Distance 2.5G Optical Links

Specifications

Why Choose a 20km 2.5G BiDi SFP Module?

A 20km 2.5G BiDi SFP Module is useful when a network needs higher-than-Gigabit optical transmission over one single mode fiber core across longer distances.

This helps users:

• Save fiber core resources
• Upgrade selected 1G links to 2.5G
• Extend 2.5G Ethernet over longer single mode fiber routes
• Reduce cabling cost by using one fiber core
• Connect buildings, campus networks, telecom rooms, and access devices
• Build compact point-to-point 2.5G optical links

For network upgrades that need more bandwidth than standard 1G but do not require 10G, the Luleey 20km Single Fiber SFP Module provides a practical middle option.

10km vs 20km 2.5G BiDi SFP Module

Both 10km and 20km versions support 2.5G single-fiber transmission, but they are designed for different optical budgets.

Choose the 10km version when the fiber route is shorter and link loss is low.

Choose the 20km SFP Module when the route is longer or when the fiber path includes more connectors, patch panels, adapters, ODF points, or passive loss.

LC BiDi SFP vs SC BiDi SFP

Choose this LC version when your equipment or patching system uses LC fiber interfaces.

Choose the SC version when the existing ODF, patch panel, or fiber distribution environment uses SC connectors.

How BiDi Transmission Works

BiDi means bidirectional transmission. A BiDi SFP module transmits and receives optical signals over one fiber core by using two different wavelengths.

A typical 2.5G BiDi pair works like this:

| Side | Transmit Wavelength | Receive Wavelength |
|—|—|
| Side A | 1310nm | 1550nm |
| Side B | 1550nm | 1310nm |

Because of this wavelength pairing, BiDi SFP modules must be used in matched pairs. Two modules with the same wavelength direction will not create a normal link.

Compatibility Notes

Luleey can provide compatible coding for different switch, router, and media converter platforms. Before ordering, please confirm the device brand and model to ensure correct recognition and stable operation.

Common compatibility options include Cisco, Huawei, H3C, Juniper, TP-Link, ZTE, Ubiquiti, MikroTik, Intel, HPE-Aruba, Arista, Brocade, Extreme, Mellanox, and General coding.

Important Pairing Notes

This 2.5G SFP Transceiver should be used with the correct opposite wavelength module. A 1310nm TX / 1550nm RX module should be paired with a 1550nm TX / 1310nm RX module.

Before deployment, confirm:

• The host device supports 2.5G SFP modules
• The fiber type is single mode
• The connector type is LC
• The link distance is within 20km
• The two modules are matched A/B wavelength pairs
• The compatibility coding matches the switch or router brand
• The optical budget is suitable for the actual fiber link loss

FAQ

What is a 2.5G BiDi SFP Module?

A 2.5G BiDi SFP Module is an optical transceiver that supports 2.5Gbps transmission over one single mode fiber core using two different wavelengths.

What is this 2.5G SFP Transceiver used for?

It is used for 2.5G Ethernet fiber links, 2.5G switches, routers, media converters, access equipment, campus networks, telecom rooms, and building-to-building optical links.

Does this module use one fiber or two fibers?

It uses one single mode fiber core through an LC simplex connector.

What wavelengths does this module use?

It uses a 1310nm / 1550nm wavelength pair. The opposite side must use the reversed wavelength direction.

Does it need to be used in pairs?

Yes. BiDi SFP modules must be used in matched A/B wavelength pairs.

What connector does this module use?

This 20km version uses an LC simplex connector.

Is this module single mode or multimode?

This is a single mode SFP module.

What is the transmission distance?

This version supports up to 20km transmission over suitable single mode fiber.

What is the difference between the 10km and 20km versions?

The 10km version is suitable for shorter fiber routes and lower-loss links. The 20km version provides more optical budget for longer routes or links with higher passive loss.

Is this module compatible with Cisco, Huawei or MikroTik?

Luleey can provide compatible coding for Cisco, Huawei, H3C, Juniper, TP-Link, ZTE, Ubiquiti, MikroTik, Intel, HPE-Aruba, and other platforms. Please confirm the device model before ordering.

Can I use it in a 1G SFP port?

Usually no. This module is designed for 2.5G SFP operation. Use a 1.25G SFP module if the host device only supports standard Gigabit SFP.

Why choose Luleey 2.5G BiDi SFP modules?

Luleey 2.5G BiDi SFP modules provide single-fiber 2.5G optical transmission, LC single mode connectivity, compatibility options, and factory-tested performance for enterprise, access, campus, telecom, and media converter deployment.