Walsun 100G QSFP28 ER1 Transceiver Module

About Walsun 100G QSFP28 ER1 30km Optical Transceiver Module in Bangladesh

The Walsun 100G QSFP28 ER1 is a high-speed single-lambda 100Gbps optical transceiver designed for long-distance Ethernet networking over single-mode fiber. The ER1 module provides transmission up to 30km and uses PAM4 optical signaling with a compact QSFP28 form factor.

Walsun's official ER1 documentation identifies the module as a 100G QSFP28 ER1 design supporting 106.25Gb/s optical signaling, transmission over up to 30km of single-mode fiber, integrated digital diagnostics, a duplex LC optical interface, and a maximum power consumption of 4.5W. The module operates from 0°C to 70°C. Walsun official products

The ER1 architecture differs from traditional four-lambda LR4/ER4 optics by transmitting the 100G signal over a single optical wavelength. This simplifies the optical architecture while providing a longer reach than standard 100G LR1 modules.

Walsun 100G QSFP28 ER1 Specifications & Features

Overview

The Walsun 100G QSFP28 ER1 provides 100Gbps optical connectivity for applications requiring more reach than conventional 100G LR1 optics while retaining the compact QSFP28 form factor.

Walsun identifies its 100G QSFP28 ER1 family alongside its LR1, ER4 and ZR4 optical solutions, providing different transmission options for 100G network deployments. Walsun official website

Buy Walsun 100G QSFP28 ER1 in Bangladesh

Purchase the Walsun 100G QSFP28 ER1 30km Optical Transceiver Module from Datacom Technologies (BD). We supply 100G QSFP28 optical transceivers, long-distance fiber modules, data center interconnect optics and enterprise networking solutions throughout Bangladesh.

Key Features

• 100Gbps high-speed optical connectivity
• QSFP28 form factor
• 100G ER1 single-lambda architecture
• PAM4 optical modulation
• 106.25Gb/s optical signaling
• Up to 30km transmission over SMF
• 1310nm-class optical wavelength
• EML transmitter
• APD receiver
• Duplex LC optical connector
• DDM digital monitoring
• CAUI-4 electrical interface
• Maximum 4.5W power consumption
• 0°C to 70°C operating temperature
• QSFP28 MSA/SFF-compliant architecture

100G ER1 Single-Lambda Technology

The major difference between ER1 and conventional four-lambda 100G optical modules is the number of optical wavelengths used.

Traditional LR4 and ER4 modules use four optical wavelengths, with approximately 25Gbps carried on each optical channel. The ER1 architecture instead uses a single optical wavelength with PAM4 modulation to transport the complete 100Gbps optical signal.

This single-lambda approach reduces the number of optical components and can help reduce module complexity and power consumption while enabling longer-distance 100G connectivity.

30km Single-Mode Fiber Reach

The Walsun ER1 module is specified for transmission distances of up to 30km over single-mode fiber. This makes it suitable for long-distance enterprise, metro and data-center interconnection applications.

The actual achievable distance depends on the complete optical link budget, including fiber attenuation, connector losses, splice losses, dispersion and available system margin.

1310nm-Class Optical Wavelength

The ER1 operates in the 1310nm optical region. Walsun's technical documentation gives wavelength values around the 1304nm to 1310nm region for the ER1 implementation.

Unlike four-lambda LR4/ER4 modules, the ER1 uses a single optical channel rather than four separate LAN-WDM wavelengths.

PAM4 Modulation

The module uses 4-level Pulse Amplitude Modulation (PAM4). PAM4 enables two bits of information to be carried per symbol, allowing a high data rate while maintaining a relatively low electrical and optical baud rate compared with equivalent NRZ signaling.

Walsun specifies a 106.25Gb/s optical signaling rate for the ER1 module. Walsun ER1 technical datasheet

EML Transmitter and APD Receiver

The Walsun ER1 uses an EML transmitter and APD receiver. This optical architecture is designed to provide the optical performance and receiver sensitivity needed for extended 100G transmission.

The APD receiver provides higher optical sensitivity than a conventional PIN receiver, which is beneficial for longer-distance optical links.

Duplex LC Connectivity

The module uses a duplex LC optical interface for its single-mode fiber connection. One fiber is used for transmission and the second fiber is used for reception.

LC connectivity is widely deployed in enterprise, telecom and data center optical infrastructure, making the module suitable for long-distance fiber links where LC cabling is already installed.

Digital Diagnostic Monitoring

Walsun specifies an integrated I2C digital diagnostic monitoring interface. Compatible network equipment can use the module's monitoring functions to retrieve operating information such as temperature, voltage, transmitter bias and optical power.

The published ER1 datasheet lists diagnostic monitoring ranges for temperature, supply voltage, Tx bias current, Tx output power and Rx power. Walsun technical datasheet

Optical Performance

For the 30km ER1 implementation, Walsun specifies an average transmit launch-power range of approximately +1.7dBm to +7.1dBm. The receiver's average input range is specified from approximately -16dBm to -3.4dBm, with a receiver damage threshold of approximately -2.4dBm. Walsun ER1 datasheet

For a real 30km deployment, the complete optical link should be calculated using the exact module variant, fiber attenuation, connectors, splices and engineering margin.

100G ER1 vs 100G LR1

Walsun's product information identifies LR1 and ER1 as separate single-lambda 100G solutions. Its selection guide describes LR1 as a 10km solution, while its ER1 product is designed for substantially longer transmission. Walsun 100G QSFP28 selection guide

100G ER1 vs 100G ER4

ER1 is particularly attractive where a single-lambda architecture is preferred. ER4 uses four optical channels and can provide greater reach depending on the specific module implementation.

Enterprise, Metro & Data Center Applications

• 100GbE data center interconnection
• Long-distance DCI
• Metro Ethernet networks
• Enterprise WAN connectivity
• Campus backbone networks
• Core-to-distribution links
• Telecom network aggregation
• Cloud infrastructure
• High-capacity backbone links
• Long-distance switch-to-switch connections

Compatibility

Walsun states that its 100G QSFP28 transceivers can be supplied in versions compatible with mainstream networking vendors including Cisco, Arista, Juniper, Brocade, Dell, Extreme, Huawei, H3C, Ciena, Mellanox and other platforms. Walsun compatibility information

Because optical modules can be vendor-coded, the exact host platform should be specified when ordering. A QSFP28 port alone does not guarantee compatibility with every 100G ER1 module.

Installation Considerations

• Use compatible single-mode fiber.
• Use duplex LC connectors.
• Verify the complete 30km optical link budget.
• Check fiber attenuation, connector and splice losses.
• Clean and inspect LC connectors before installation.
• Verify QSFP28 host compatibility.
• Specify the required OEM coding when ordering.
• Confirm the required operating-temperature grade.

Benefits

• 100Gbps high-speed networking
• Up to 30km SMF transmission
• Single-lambda optical architecture
• PAM4 modulation
• 1310nm-class optical operation
• EML transmitter
• APD receiver
• Duplex LC connectivity
• DDM monitoring
• CAUI-4 electrical interface
• Maximum 4.5W power consumption
• Suitable for long-distance DCI and metro networks

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies Walsun 100G QSFP28 optical transceivers, ER1/LR1 modules, long-distance fiber optics, data center interconnect products and enterprise networking solutions in Bangladesh. Customers can receive competitive pricing, technical consultation, compatibility guidance and nationwide delivery.

• Call/WhatsApp: +8801748173213
• Email: sales@datacomtechbd.com
• Alternative Email: datacomtechnologiesbd@gmail.com
• Office: Tropical Center, 218, Dr. Kudroti Khuda Road, New Elephant Road, Dhaka-1205, Bangladesh

Frequently Asked Questions (FAQ)

Q1: What is the Walsun 100G QSFP28 ER1?
It is a 100Gbps single-lambda QSFP28 optical transceiver designed for long-distance single-mode fiber networking.

Q2: What is the maximum transmission distance?
The Walsun ER1-30 implementation supports transmission up to 30km over single-mode fiber.

Q3: What modulation does the ER1 use?
The module uses PAM4 optical signaling.

Q4: Is the ER1 single-lambda or four-lambda?
The ER1 is a single-lambda 100G optical architecture, using one optical channel rather than four separate LAN-WDM channels.

Q5: What wavelength does it use?
The ER1 operates in the 1310nm optical region, with Walsun's 30km implementation specifying wavelength characteristics around 1304nm to 1310nm.

Q6: What fiber does it require?
It is designed for Single-Mode Fiber (SMF).

Q7: What connector does it use?
The module uses a duplex LC optical connector.

Q8: Does it support DDM?
Yes. Walsun specifies integrated digital diagnostic monitoring through its I2C interface.

Q9: What transmitter and receiver are used?
The 30km ER1 implementation uses an EML transmitter and APD receiver.

Q10: How much power does it consume?
Walsun specifies maximum power dissipation of 4.5W for the ER1-30 implementation.

Q11: Is it compatible with Cisco, Huawei and Juniper?
Walsun offers OEM-compatible versions for major networking vendors, but the exact coding should be confirmed for the target switch or router.

Q12: Where can I buy Walsun 100G QSFP28 ER1 in Bangladesh?
You can contact Datacom Technologies (BD) for Walsun 100G QSFP28 ER1 optical transceivers, long-distance 100G optics and data center/enterprise fiber networking solutions with nationwide delivery.