FINISAR 100G-QSFP-ER4 40KM Transceiver Module

About Finisar 100G-QSFP-ER4 100GBASE-ER4 40KM QSFP28 Transceiver Module in Bangladesh

The Finisar 100G-QSFP-ER4 is a high-speed 100Gbps QSFP28 optical transceiver module designed for long-distance Ethernet connectivity over single-mode fiber. Supporting the 100GBASE-ER4 optical standard, the module is designed for links of up to 40km and uses four LAN-WDM optical channels around the 1310nm wavelength region.

With a compact QSFP28 form factor and duplex LC fiber connection, the 100G-QSFP-ER4 is suitable for high-capacity network infrastructure, data center interconnection, enterprise core networks and long-distance 100GbE optical links. Comparable 100GBASE-ER4 QSFP28 modules specify 40km transmission over single-mode fiber with Duplex LC connectivity. ([lsolink.com](https://www.lsolink.com/product/212818/))

Finisar 100G-QSFP-ER4 Specifications & Features

Overview

The Finisar 100G-QSFP-ER4 provides 100Gbps optical connectivity for long-distance network links. Its 100GBASE-ER4 architecture uses four optical channels that are multiplexed onto a single fiber pair, allowing high-bandwidth Ethernet connectivity over single-mode fiber.

The 40km reach makes this type of transceiver particularly suitable for applications where a standard 100GBASE-LR4 module with shorter reach is insufficient. 100GBASE-ER4 QSFP28 modules are commonly specified for 40km SMF links with Duplex LC connectors. ([qsfptek.com](https://www.qsfptek.com/product/100101.html))

Buy Finisar 100G-QSFP-ER4 40KM Transceiver in Bangladesh

Purchase the Finisar 100G-QSFP-ER4 100GBASE-ER4 40KM QSFP28 Transceiver Module from Datacom Technologies (BD). We supply enterprise optical transceivers, QSFP28 modules, SFP/SFP+ modules, data center networking equipment and fiber-optic infrastructure in Bangladesh with competitive pricing and technical consultation.

Key Features

• 100Gbps high-speed Ethernet connectivity
• 100GBASE-ER4 optical standard
• Up to 40km transmission distance
• QSFP28 form factor
• 1310nm LAN-WDM optical technology
• Four optical wavelengths
• Duplex LC connector
• Single-Mode Fiber operation
• Designed for long-distance 100GbE links
• Suitable for data center interconnection
• Suitable for enterprise core networking
• Digital diagnostic monitoring on supported implementations

Applications

• 100GbE Data Center Interconnection
• Enterprise Core Networks
• Long-Distance Ethernet Links
• Data Center-to-Data Center Connectivity
• Campus Network Backbone
• High-Performance Computing Networks
• Service Provider Networks
• Cloud Infrastructure
• Enterprise Distribution Networks
• High-Bandwidth Optical Networks

100Gbps High-Speed Connectivity

The Finisar 100G-QSFP-ER4 is designed to provide 100Gbps Ethernet connectivity in a compact QSFP28 optical module. It is intended for high-bandwidth networking environments where 100GbE capacity is required over a long optical link.

100GBASE-ER4 QSFP28 transceivers are designed for 100GbE connectivity and are commonly deployed in data center interconnection, enterprise core and distribution-layer applications. ([qsfptek.com](https://store.qsfptek.com/products/qsfp-100g-er4-ai))

40KM Long-Distance Transmission

The ER4 designation identifies a long-reach 100GbE optical solution with a nominal reach of up to 40km over suitable single-mode fiber infrastructure.

A 40km optical reach can be useful for connecting geographically separated facilities, data centers, enterprise campuses and metropolitan network locations where shorter-reach 100GbE optics are not sufficient.

Actual achievable distance depends on fiber quality, connector losses, optical budget, splice losses, link engineering and the specific transceiver implementation.

1310nm LAN-WDM Technology

The 100GBASE-ER4 architecture uses four LAN-WDM optical channels in the approximately 1310nm wavelength region. These optical channels are multiplexed for transmission through the single-mode fiber link.

Comparable 100GBASE-ER4 specifications identify four wavelengths around 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm. ([direcxource.com](https://www.direcxource.com/products/qsfp-100g-er4))

QSFP28 Form Factor

The Finisar 100G-QSFP-ER4 uses the compact QSFP28 form factor. QSFP28 is widely used for 100GbE switching, routing and data center networking equipment.

The compact form factor allows high-density 100GbE ports to be deployed in modern network switches, routers and other compatible optical networking equipment.

Duplex LC Connector

The 100G-QSFP-ER4 uses a Duplex LC optical interface for connection to the single-mode fiber infrastructure.

Duplex LC connectivity provides separate optical paths for transmit and receive signals through the fiber pair. Comparable 100GBASE-ER4 modules specify Duplex LC connectors and SMF operation. ([lsolink.com](https://www.lsolink.com/product/212818/))

Single-Mode Fiber Operation

The ER4 optical design is intended for single-mode fiber (SMF). Suitable OS2-class single-mode fiber infrastructure is commonly used for long-distance 100GbE deployments.

Before installation, verify the fiber type, connector polish, link budget and optical specifications against the transceiver and the network equipment.

Four-Channel Optical Architecture

100GBASE-ER4 uses four optical channels, each carrying approximately 25Gbps-class signaling. The channels are combined through wavelength-division multiplexing to provide aggregate 100Gbps optical connectivity.

On the receiving side, the optical signal is separated into its individual wavelength channels and converted back into electrical data for the host equipment.

Digital Diagnostic Monitoring

100GBASE-ER4 QSFP28 implementations can support digital diagnostic monitoring, allowing compatible network equipment to monitor optical operating parameters.

Depending on the exact Finisar hardware revision and host implementation, available diagnostic information may include module temperature, supply voltage, optical transmit power, receive power and other operating parameters.

Data Center Interconnection

The 40km reach of ER4 optics makes this class of transceiver suitable for data center interconnection where facilities are separated by significant geographic distances.

It can provide high-bandwidth optical connectivity between compatible 100GbE switches, routers or other network devices using single-mode fiber infrastructure.

Enterprise Core Networking

Enterprise networks increasingly use 100GbE connectivity in core and aggregation layers. The Finisar 100G-QSFP-ER4 can be considered for long-distance optical links where compatible equipment supports the required 100GBASE-ER4 implementation.

It is suitable for high-bandwidth backbone connections between network aggregation points, data centers and major enterprise facilities.

High-Performance Computing Networks

High-performance computing environments require high-bandwidth, low-overhead network connectivity between compute, storage and network infrastructure.

100GbE ER4 optics can be used in suitable HPC network architectures where long-distance single-mode fiber connectivity is required.

100GBASE-ER4 vs 100GBASE-LR4

Compatibility Considerations

The Finisar 100G-QSFP-ER4 should only be installed in network equipment that supports the required QSFP28 form factor and 100GBASE-ER4 optical specification.

• Verify QSFP28 port compatibility
• Verify 100GBASE-ER4 support
• Verify optical module coding/compatibility
• Use appropriate single-mode fiber
• Use compatible Duplex LC connectivity
• Verify optical link budget
• Confirm switch/router firmware compatibility

Optical transceiver compatibility is not determined solely by physical connector type. The host switch or router may require vendor-specific coding or firmware support, so the exact network equipment model should be verified before ordering.

Optical Link Budget

For a 40km optical link, link-budget planning is important. Fiber attenuation, connector insertion loss, splice loss, patch panels and other passive components all reduce the available optical margin.

The advertised 40km distance should therefore be treated as a design target under appropriate optical conditions rather than a guarantee for every installed fiber route.

Enterprise Network Deployment

The Finisar 100G-QSFP-ER4 can be used as part of high-capacity enterprise networking infrastructure where long-distance 100GbE connectivity is required.

• Core-to-core connectivity
• Data center interconnects
• Aggregation-to-core links
• Campus backbone links
• Cloud infrastructure
• Service-provider infrastructure

Benefits

• 100Gbps network bandwidth
• Up to 40km optical reach
• QSFP28 high-density form factor
• 1310nm LAN-WDM optical architecture
• Duplex LC connectivity
• Single-mode fiber support
• Suitable for long-distance 100GbE deployments
• Suitable for data center interconnection
• Suitable for enterprise core networking
• High-bandwidth optical backbone connectivity

Why Buy Finisar 100G-QSFP-ER4 from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies enterprise optical transceivers, QSFP28 modules, SFP/SFP+ optics, fiber networking equipment and data center infrastructure in Bangladesh. Customers can receive competitive pricing, technical consultation, compatibility guidance 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 Finisar 100G-QSFP-ER4?
The Finisar 100G-QSFP-ER4 is a 100Gbps QSFP28 optical transceiver designed for 100GBASE-ER4 long-distance Ethernet connectivity.

Q2: What is the maximum transmission distance?
The 100GBASE-ER4 specification is designed for optical links of up to approximately 40km over suitable single-mode fiber.

Q3: What form factor does it use?
It uses the QSFP28 form factor.

Q4: What wavelength does the ER4 module use?
It uses four LAN-WDM optical channels in the approximately 1310nm wavelength region.

Q5: What connector does the 100G-QSFP-ER4 use?
The ER4 optical configuration uses a Duplex LC connector.

Q6: Does it require single-mode fiber?
Yes. 100GBASE-ER4 is designed for single-mode fiber links.

Q7: Is the Finisar 100G-QSFP-ER4 suitable for data center interconnection?
Yes. 100GBASE-ER4 QSFP28 modules are commonly used for long-distance data center interconnection and high-bandwidth enterprise networking.

Q8: Does it support digital diagnostics?
Comparable 100GBASE-ER4 QSFP28 modules support digital diagnostic monitoring. Exact diagnostic capabilities depend on the specific Finisar module revision and host equipment.

Q9: Can I use it with any QSFP28 port?
Not necessarily. The host equipment must support the required 100GBASE-ER4 specification and may require vendor-specific optical module coding.

Q10: What is the difference between ER4 and LR4?
Both provide 100GbE connectivity using QSFP28 and single-mode fiber, but ER4 is designed for a longer reach of up to 40km, while LR4 is generally designed for links up to 10km.

Q11: Is 100G-QSFP-ER4 suitable for enterprise core networks?
Yes. Its 100Gbps bandwidth and long-distance optical reach make it suitable for compatible enterprise core and aggregation networks.

Q12: Where can I buy Finisar 100G-QSFP-ER4 in Bangladesh?
You can contact Datacom Technologies (BD) for Finisar and other enterprise optical transceivers, QSFP28 modules, fiber networking equipment and data center hardware with competitive pricing and nationwide delivery.