Solitine 100G LR4 QSFP28 Module – High-Capacity Fiber Links Up to 20km

When a network requires 100 Gigabit Ethernet connectivity between distant distribution locations, choosing the correct optical transceiver is essential. The installed fiber, optical link budget and supported switch ports all affect whether a high-speed connection can operate reliably.

The Solitine 100G LR4 QSFP28 Module – 20km is listed as a long-reach optical transceiver designed for compatible 100G networking equipment. It uses single-mode fiber (SMF), an LC Duplex connector and four LAN-WDM wavelength channels for transmission across fiber routes with a rated reach of up to 20km.

This configuration is relevant for ISP backbone infrastructure, enterprise core networking and data centre interconnections where short-range multimode optical modules cannot meet the required distance.

Four Optical Wavelengths for 100 Gigabit Ethernet

The Solitine 100G LR4-type transceiver uses four optical channels to carry high-speed Ethernet traffic.

Its published LAN-WDM wavelengths are:

• 1295.56nm

• 1300.05nm

• 1304.59nm

• 1309.14nm

These wavelengths are combined for transmission and separated at the receiving end, allowing multiple optical channels to operate over a standard duplex single-mode fiber connection.

The module is listed with an aggregate 100 Gigabit Ethernet data rate, using four optical lanes operating at approximately 25.78125Gbps each.

The optical line rate is associated with 100G Ethernet transmission and should not be confused with guaranteed application throughput or internet speed.

LC Duplex Connectivity Over Single-Mode Fiber

Unlike an SR4 QSFP28 module that uses MPO parallel multimode cabling, the Solitine 20km long-reach module uses an LC Duplex optical interface.

One fiber strand carries transmitted optical signals while the second strand carries received signals.

This makes the module suitable for fiber infrastructure using compatible LC Duplex single-mode connections, provided the two endpoints support the same optical characteristics.

The manufacturer lists a rated transmission reach of up to 20km.

Actual operation depends on the complete optical loss budget, including fiber attenuation, connector insertion loss, splices and available engineering margin. A 20km distance rating does not guarantee successful operation across every fiber route.

For network planning, the manufacturer publishes a transmit-power range of -4.3 to +4.5dBm and a typical receiver-sensitivity figure of -10.5dBm. These values should be checked against the exact module datasheet when calculating the supported optical path.

Built for Network Backbone and Interconnection Projects

The Solitine 100G QSFP28 20km module is relevant where high network capacity and longer optical distance are both required.

ISP backbone connections: Establish high-capacity point-to-point Ethernet uplinks between compatible core or aggregation networking devices at separate locations.

Enterprise core networks: Connect major distribution sites, office campuses or industrial networking facilities using suitable single-mode fiber infrastructure.

Data centre interconnections: Provide 100G-capable optical connectivity between supported facilities within the transceiver's rated reach and optical budget.

The compact, hot-pluggable QSFP28 form factor is designed for installation in compatible 100G switch or router ports.

Solitine lists physical dimensions of approximately 72 × 18.35 × 8.5mm and a module weight of around 35g, with a published operating temperature range of 0°C to 70°C.

Digital Diagnostics and Host Compatibility

The Solitine 100G LR4 QSFP28 listing includes Digital Diagnostic Monitoring (DDM) support.

On supported network equipment, DDM may provide access to optical signal measurements, temperature and other transceiver operating information. These readings can assist with commissioning and diagnosing fiber connectivity problems.

However, diagnostic visibility depends on the host hardware, management software and firmware.

Before ordering, confirm that your networking device supports the required 100G QSFP28 optical type, single-mode LC Duplex connections and the transceiver's operating characteristics.

A compatible physical port does not automatically guarantee support for every third-party optical module.

Choosing the Correct 100G Optical Standard

Although several optical transceivers share the QSFP28 form factor, their transmission methods are different.

100G SR4 is generally intended for shorter multimode fiber connections using MPO interfaces.

100G LR4 uses four wavelength channels over single-mode fiber with an LC Duplex interface, typically associated with a standard 10km reach.

This Solitine 20km model is advertised with LR4-type optical specifications and a longer rated reach. Because the manufacturer's model naming is inconsistent, the exact SKU and optical performance should be confirmed before deployment.

It should not be confused with a 100G SR4 multimode transceiver, a single-fiber BiDi module or a GPON/EPON OLT optical module.

Solitine 100G LR4 QSFP28 Module Price in Bangladesh

The Solitine 100G LR4 QSFP28 Module 20km price in Bangladesh is ৳23,000 at Trende Bangladesh, compared with the listed regular price of ৳25,500.

For networking professionals comparing 100G QSFP28 Module prices in Bangladesh, this model offers a long-reach optical design, LC Duplex connectivity, four-channel LAN-WDM transmission and DDM support for compatible 100 Gigabit Ethernet infrastructure.

The Solitine listing specifies one QSFP28 optical transceiver with a protective dust cap. Trende Bangladesh offers a 1-year warranty.

Before placing an order, verify the actual model identification, host-device compatibility and optical requirements for your intended 20km fiber link.