Edgecore ET7402-ER4 100G Transceiver 40KM QSFP28

About Edgecore ET7402-ER4 100GBASE-ER4 Lite 40km QSFP28 Optical Transceiver in Bangladesh

The Edgecore ET7402-ER4 is a high-performance 100GbE QSFP28 optical transceiver designed for long-distance Ethernet connectivity over single-mode fiber. Supporting up to 40km transmission with Forward Error Correction (FEC), it is suitable for data center interconnects, metropolitan networks, enterprise backbone links and other extended-reach 100GbE applications.

The ET7402-ER4 uses 1310nm LAN-WDM optics and a duplex LC connector. Edgecore specifies four cooled 25Gb/s optical channels using LAN-WDM EML TOSA technology and a four-channel APD photodetector. The module is compliant with QSFP28 MSA and 100GBASE-ER4 Lite. ([Edgecore](https://www.edge-core.com/product/et7402-er4/))

Edgecore specifies a maximum reach of 30km without FEC and 40km with FEC over single-mode fiber. Therefore, the 40km figure should be treated as a FEC-enabled reach rather than a universal 40km guarantee for every optical link. ([Edgecore Datasheet](https://www.edge-core.com/download/et7402-er4-ds/))

Edgecore ET7402-ER4 100G QSFP28 Specifications & Features

Overview

The Edgecore ET7402-ER4 provides 100Gbps Ethernet connectivity over extended distances using single-mode fiber. It occupies the middle ground between standard 100G LR4 modules designed for approximately 10km and longer-reach ZR4 modules designed for up to 80km with FEC.

Its 40km FEC-enabled reach makes it particularly suitable for data center interconnects, metropolitan aggregation and enterprise backbone links where 10km optical modules are insufficient but an 80km ZR4 solution is unnecessary. Edgecore's 100G transceiver catalog identifies ET7402-ER4 as a 40km SMF module using 1310nm LAN-WDM and duplex LC connectivity. ([Edgecore 100G Transceivers](https://www.edge-core.com/categories/transceiver-and-cables/transceivers/100g-qsfp28-transceiver/))

Buy Edgecore ET7402-ER4 100G 40km QSFP28 Transceiver in Bangladesh

Purchase the Edgecore ET7402-ER4 100GBASE-ER4 Lite 40km QSFP28 Optical Transceiver from Datacom Technologies (BD). We supply Edgecore optical transceivers, QSFP28 modules, SFP/SFP+ optics, enterprise networking equipment and data center connectivity solutions in Bangladesh with competitive pricing, technical consultation and nationwide delivery.

Key Features

• 100Gbps Ethernet connectivity
• QSFP28 optical form factor
• 100GBASE-ER4 Lite support
• Up to 30km reach without FEC
• Up to 40km reach with FEC
• Single-mode fiber operation
• 1310nm LAN-WDM optics
• Duplex LC connector
• 4 × 25Gb/s optical channels
• LAN-WDM EML transmitter
• Four-channel APD receiver
• Digital Diagnostic Monitoring
• Less than 4.5W power consumption
• 0°C to +70°C commercial operating temperature
• Single +3.3V power supply
• QSFP28 MSA compliant
• RoHS 6/6 compliant

Applications

• 100GbE Data Center Interconnect
• Metropolitan Ethernet Networks
• Enterprise Backbone Networks
• Cloud Infrastructure
• Service Provider Networks
• Long-Distance 100GbE Links
• Data Center Spine Connectivity
• Campus Interconnects
• High-Bandwidth Core Networks

100GbE Extended-Reach Connectivity

The ET7402-ER4 is designed for 100GbE links where standard 10km LR4 optics do not provide enough reach.

With FEC enabled, Edgecore specifies transmission distances of up to 40km over single-mode fiber. Without FEC, the specified maximum reach is 30km. Actual achievable distance depends on fiber attenuation, connector and splice losses, optical dispersion, link budget and the capabilities of the connected network equipment. ([Edgecore](https://www.edge-core.com/product/et7402-er4/))

100GBASE-ER4 Lite

The ET7402-ER4 complies with the 100GBASE-ER4 Lite specification. The module uses four optical channels operating at approximately 25Gb/s each, with LAN-WDM technology combining the four channels into a single 100Gbps Ethernet connection.

Edgecore specifically identifies the ET7402-ER4 as compliant with QSFP28 MSA and 100G Ethernet ER4 Lite. ([Edgecore](https://www.edge-core.com/product/et7402-er4/))

1310nm LAN-WDM

The ET7402-ER4 uses four LAN-WDM optical wavelengths around the 1310nm band. Edgecore's datasheet specifies center wavelengths of approximately 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm for the four optical lanes. ([Edgecore Datasheet](https://www.edge-core.com/download/et7402-er4-ds/))

The four wavelengths are multiplexed for transmission over the single-mode fiber link and separated at the receiving end.

Duplex LC Connector

The ET7402-ER4 uses a standard duplex LC connector. This makes it suitable for structured single-mode fiber infrastructure using conventional LC patch panels and duplex LC fiber cabling.

Unlike 100G SR4 modules that typically use MPO connectors, the ER4 module uses duplex LC connectivity for extended-reach single-mode fiber applications.

Single-Mode Fiber

The ET7402-ER4 is designed for single-mode fiber. Edgecore specifies SMF as the optical medium and rates the module for up to 30km without FEC or 40km with FEC. ([Edgecore](https://www.edge-core.com/product/et7402-er4/))

For long-distance deployments, the complete optical link budget should be calculated before installation.

Four 25Gb/s Optical Channels

The ET7402-ER4 uses four cooled 25Gb/s optical channels. Edgecore specifies LAN-WDM EML TOSA technology on the transmitter side and four-channel APD photodetection on the receiver side. ([Edgecore](https://www.edge-core.com/product/et7402-er4/))

The four lanes operate together to deliver the module's aggregate 100Gbps Ethernet data rate.

Digital Diagnostic Monitoring

Digital diagnostic functions are available through the module's I2C interface as specified by the QSFP28 MSA. This allows compatible host equipment to retrieve optical and operational monitoring information.

The exact diagnostic information displayed depends on the switch, router, network operating system and transceiver-management implementation.

Power Consumption

Edgecore specifies power consumption of less than 4.5W for the ET7402-ER4. The module operates from a single +3.3V power supply. ([Edgecore](https://www.edge-core.com/product/et7402-er4/))

Commercial Temperature Range

The ET7402-ER4 is specified for a commercial operating temperature range of 0°C to +70°C. This makes it suitable for controlled data center and enterprise networking environments. ([Edgecore](https://www.edge-core.com/product/et7402-er4/))

Data Center Interconnect

The ET7402-ER4 is well suited to data center interconnect applications requiring 100Gbps bandwidth over distances beyond the reach of standard LR4 optics.

Compatible 100GbE switches, routers or other network devices can use the module to establish long-distance optical links where the host port supports the required QSFP28 module and FEC configuration.

Metro and Backbone Networks

The 40km FEC-enabled reach makes the ET7402-ER4 suitable for metropolitan and backbone networking applications.

Potential deployments include inter-building connectivity, campus networks, metropolitan aggregation, service-provider networks and geographically separated data center facilities.

ET7402-ER4 vs Other Edgecore 100G QSFP28 Optics

Edgecore's official transceiver catalog distinguishes the ET7402 family by optical reach, fiber type and connector. The ER4 provides a 40km FEC-enabled reach between the 10km LR4 and 80km ZR4 options. ([Edgecore 100G Transceivers](https://www.edge-core.com/categories/transceiver-and-cables/transceivers/100g-qsfp28-transceiver/))

Compatibility

Edgecore states that its pluggable optical modules are pre-qualified for compatibility with Edgecore switch products and are designed to provide flexibility across supported networking platforms. ([Edgecore Transceivers](https://www.edge-core.com/categories/transceiver-and-cables/transceivers/100g-qsfp28-transceiver/))

Before purchasing, verify the exact switch or router model, QSFP28 port capability, supported optical standards, firmware/NOS compatibility and FEC requirements.

Optical Link Planning

The 40km rating should not be interpreted as a guarantee that every 40km fiber route will operate successfully. The complete optical budget must be considered.

• Single-mode fiber attenuation
• Fiber length
• Connector losses
• Splice losses
• Optical dispersion
• Transmitter output power
• Receiver sensitivity
• FEC support
• Host-device compatibility

For long-distance installations, calculate the optical link budget and confirm FEC compatibility before deployment.

Benefits

• 100Gbps high-bandwidth connectivity
• Up to 40km reach with FEC
• Up to 30km without FEC
• 100GBASE-ER4 Lite support
• Single-mode fiber support
• 1310nm LAN-WDM optics
• Duplex LC connectivity
• QSFP28 compact form factor
• DDM support
• Less than 4.5W power consumption
• Suitable for data center interconnects
• Suitable for metro and backbone networks

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies Edgecore optical transceivers, QSFP28 modules, SFP/SFP+ optics, enterprise networking equipment and data center connectivity solutions in Bangladesh. Customers can receive competitive pricing, technical consultation, deployment assistance and nationwide delivery.

• Call/WhatsApp: +8801748173213
• Email: sales@datacom.com.bd
• 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 Edgecore ET7402-ER4?
The ET7402-ER4 is a 100GbE QSFP28 ER4 Lite optical transceiver designed for long-distance Ethernet transmission over single-mode fiber.

Q2: What is the maximum reach?
Edgecore specifies up to 40km over SMF when FEC is used. Without FEC, the specified maximum reach is 30km.

Q3: What wavelength does the ET7402-ER4 use?
It uses 1310nm LAN-WDM optics with four optical channels.

Q4: What connector does it use?
The module uses a duplex LC connector.

Q5: Does it use single-mode or multimode fiber?
It is designed for single-mode fiber (SMF).

Q6: What Ethernet standard does it support?
It supports 100GBASE-ER4 Lite and is compliant with the QSFP28 MSA.

Q7: Does the ET7402-ER4 support DDM?
Yes. Digital diagnostic functions are available through the I2C interface.

Q8: What is the operating temperature?
The commercial operating temperature range is 0°C to +70°C.

Q9: Is FEC required for the full 40km reach?
Yes. Edgecore specifies 30km without FEC and 40km with FEC. The connected equipment must therefore support the required FEC configuration for a 40km link.

Q10: Is ET7402-ER4 suitable for data center interconnects?
Yes. Its 100Gbps bandwidth and extended SMF reach make it suitable for long-distance data center and backbone interconnects.

Q11: What is the difference between ET7402-ER4 and ET7402-LR4?
The ET7402-LR4 is rated for 10km, while the ET7402-ER4 supports up to 30km without FEC and 40km with FEC. Both use 100G QSFP28, SMF, 1310nm LAN-WDM and duplex LC connectivity. ([Edgecore](https://www.edge-core.com/categories/transceiver-and-cables/transceivers/100g-qsfp28-transceiver/))

Q12: What is the difference between ET7402-ER4 and ET7402-ZR4?
The ET7402-ER4 reaches up to 40km with FEC, while the ET7402-ZR4 reaches up to 80km with FEC. Both use SMF and duplex LC, but they are different optical modules.

Q13: Can it be used with any QSFP28 port?
Not necessarily. The host switch or router must support the required 100G optical standard, module compatibility and FEC configuration. Check the host manufacturer's compatibility list before deployment.

Q14: Where can I buy Edgecore ET7402-ER4 in Bangladesh?
You can contact Datacom Technologies (BD) for Edgecore QSFP28 transceivers, 100G optics and enterprise networking products with competitive pricing and nationwide delivery.