Overview of QSFP2 LR4 100G Transceiver

As data traffic continues to rise, efficient data transmission is becoming increasingly essential. Among the many technologies designed to facilitate this, QSFP28 LR4 100G transceivers stand out due to their high performance and reliability. This article aims to provide an overview of QSFP28 LR4, explaining what it is, how it works, and its advantages and applications, with a specific focus on the QSFPTEK QSFP28-100G-LR4-S Solution.

Definition of QSFP28 LR4

Quad Small Form-factor Pluggable 28 (QSFP28) Long Reach 4 (LR4) is a hot-swappable, compact transceiver used for data communications. As the name suggests, QSFP28 LR4 transceivers support a bandwidth of 100 gigabits per second (Gbps), thus meeting the demands of high-speed networks. They are designed to transmit data over a distance of up to 10 kilometers, using single-mode fiber (SMF), and are therefore primarily used in long-haul network applications.


Here is a table detailing the parameters of QSFP28-100G-LR4:

Data Rate100 Gbps
Wavelength1295~1310 nm
Max Distance10 km
Cable TypeSingle Mode Fiber (SMF)
Connector TypeLC Duplex
TX Power-4.3~4.5dBm
Receiver Sensitivity< -10.6dBm
Power ConsumptionMax 3.5W
Operating Temperature0 to 70°C
100G QSFP28 LR4 parameters

How Does 1000G LR4 Work?

The QSFP 100G LR4 transceiver works by converting electrical signals into optical signals and vice versa. It uses a 4-lane approach, where each lane operates at a data rate of 25 Gbps. The 4 lanes use Wavelength Division Multiplexing (WDM), enabling them to operate on four distinct wavelengths, effectively transmitting 100G of data in parallel. These signals are then transmitted over single-mode fiber (SMF) cables up to a distance of 10 km.

On the receiving end, the QSFP28 LR4 transceiver takes the incoming optical signals and converts them back into electrical signals, thereby completing the communication process.

QSFPTEK QSFP28-100G-LR4-S Solution

QSFPTEK offers a highly reliable and efficient solution – the QSFP28-100G-LR4-S transceiver. This module is designed for 100 Gigabit Ethernet links and offers a power-efficient and cost-effective solution for long-haul data transmission. It is fully compatible with the IEEE 802.3ba 100GBASE-LR4 standard, ensuring high interoperability and performance.

QSFP 100G LR4 Advantages

High Speed: With a data transmission rate of 100 Gbps, QSFP28 LR4 can handle high-speed network demands efficiently.

Long Distance: It supports transmission distances of up to 10 km, making it suitable for long-haul applications.

Efficiency: The WDM technology enables four data streams to be transmitted simultaneously, increasing data transmission efficiency.

Hot-swappable: QSFP28 LR4 transceivers can be swapped without turning off the network system, reducing downtime.

QSFP 100G LR4 Applications

100G to 100G Campus Network Connection

In campuses where high-speed data transmission is required across different buildings, QSFP 100GBASE-LR4 transceivers provide a robust solution due to their ability to cover long distances and handle large amounts of data.

100G-100G Interconnect in Data Center

With the surge in cloud computing, data centers require high-speed and reliable interconnections. QSFP28 LR4 transceivers enable efficient communication between servers and switches, helping to maintain fast and reliable data center operations.

100G Connect 100G Enterprise Core Layer

Enterprise core networks, the backbone of an enterprise’s communication infrastructure, can greatly benefit from the high-speed transmission offered by QSFP28 LR4 transceivers. They provide an efficient solution for connecting core switches and routers, thereby ensuring smooth data transmission within the enterprise network.

QSFP28-100G-LR4 FAQs

Q1: Can QSFP28-100G-LR4 transceivers be used in multimode fiber applications?

A1: No, QSFP 100G LR4 transceivers are designed for single-mode fiber applications. They operate at a wavelength of 1310 nm, which is typically used for long-haul transmission over single-mode fiber.

Q2: Are QSFP28-100G-LR4-S transceivers compatible with all devices?

A2: QSFP28 LR4 transceivers are typically compatible with devices that support the QSFP28 form factor and 100G Ethernet. However, it is always recommended to check the device’s compatibility list before purchasing.

Q3: How can I ensure the best performance of my QSFP LR4 100G transceiver?

A3: To ensure the best performance, it’s important to keep the transceiver and the fiber optic connectors clean. Any dust or dirt can affect the signal quality. Also, ensure that the operating conditions like temperature and humidity are within the specified range.

In conclusion, the QSFP28 LR4 100G transceiver is an effective solution for high-speed data transmission over long distances. Its compact form factor, high efficiency, and compatibility with the QSFP28 standard make it a suitable choice for a variety of network applications, including campus networks, data centers, and enterprise core networks.


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