2.5G BiDi SFP Module, SC 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 SC 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 connections, campus networks, access networks, telecom rooms, ODF systems, weak-current cabinets, 2.5G media converters, routers, switches, and broadband access extension projects.

Unlike standard dual-fiber SFP modules that require two fiber cores, this SC 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 the 10km version, the 20km version provides more optical budget for longer routes or links with higher passive loss. Compared with the LC version, this SC version is better for ODF systems, telecom rooms, access equipment, media converters, weak-current cabinets, and existing SC fiber cabling environments.

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
• SC simplex connector for single 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
• SC connector design for ODF, telecom room, access network, and weak-current cabinet deployment
• 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
• ODF Fiber Distribution Systems
• Weak-Current Cabinet Installation
• Broadband Access Extension
• Enterprise Fiber Extension
• Fiber Resource Saving Projects
• Longer 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 distance or higher-loss fiber paths.

This helps users:

• Save fiber core resources
• Upgrade selected 1G links to 2.5G
• Extend 2.5G Ethernet beyond copper cable limits
• Reduce cabling cost by using one fiber core
• Connect buildings, campus networks, telecom rooms, and access equipment
• Provide more optical budget than 10km modules
• Build stable point-to-point 2.5G optical links

For building-to-building links, telecom rooms, ODF systems, and campus fiber routes, the Luleey 20km Single Fiber SFP Module provides a practical balance between reach, cost, compatibility, and performance.

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 within 10km and link loss is low.

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

SC BiDi SFP vs LC BiDi SFP

Choose this SC version when your existing ODF, patch panel, fiber terminal box, or access network uses SC fiber interfaces.

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

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 SC
• 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
• DDM monitoring is required or supported by the host device

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, ODF systems, and building-to-building optical links.

Does this module use one fiber or two fibers?

It uses one single mode fiber core through an SC 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 SC 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.

What is the difference between SC and LC BiDi SFP modules?

SC BiDi SFP modules are often used with ODF systems, media converters, telecom rooms, access equipment, and weak-current cabinets. LC BiDi SFP modules are more common in compact SFP ports, high-density switches, routers, and modern optical equipment.

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, SC single mode connectivity, compatibility options, and factory-tested performance for enterprise, access, campus, telecom, ODF, and media converter deployment.