Fortinet QSFP-ER4L-100G 40km Optical Transceiver

About Fortinet QSFP-ER4L-100G 100GBASE-ER4L 40km QSFP28 Optical Transceiver in Bangladesh

The Fortinet QSFP-ER4L-100G is a 100GbE QSFP28 optical transceiver intended for long-distance single-mode fiber connectivity in enterprise and data center networks. The ER4/ER4L optical architecture uses 1310nm LAN-WDM wavelengths and a Duplex LC interface to provide high-speed 100Gbps Ethernet connectivity over long fiber distances.

Fortinet documentation identifies its 100G extended-range QSFP28 optics as 100GE ER4 modules using single-mode fiber, 1310nm optical transmission and LC connectivity, with reach up to 40km. :contentReference[oaicite:2]{index=2}

SKU note: Fortinet's documented part naming includes FG-TRAN-QSFP28-ER4 / QSFP28-100G-ER4 for 100G ER4 applications. The exact designation QSFP-ER4L-100G should be verified against the physical module label before publishing it as an OEM Fortinet part number.

Fortinet QSFP-ER4L-100G 100G Optical Transceiver Specifications & Features

Overview

The Fortinet 100G ER4/ER4L QSFP28 optical platform is designed for long-distance 100GbE connectivity over single-mode fiber. Its four optical wavelength channels operate around the 1310nm window and are combined into a 100Gbps Ethernet link.

The ER4L configuration is particularly useful for data center interconnection, campus core networking and long-distance enterprise Ethernet links where a 100G connection must travel significantly farther than standard SR4 or LR4 optics.

Buy Fortinet QSFP-ER4L-100G 100G 40km Transceiver in Bangladesh

Purchase the Fortinet-compatible 100GBASE-ER4/ER4L QSFP28 40km optical transceiver from Datacom Technologies (BD). We supply enterprise optical transceivers, QSFP28 modules, network switches, data center networking equipment and fiber connectivity solutions in Bangladesh.

For OEM Fortinet deployment, verify the exact Fortinet part number and compatibility with the target FortiGate, FortiSwitch or FortiDDoS platform before ordering.

Key Features

• 100Gbps Ethernet connectivity
• QSFP28 optical form factor
• 100GBASE-ER4 / ER4L architecture
• Up to 40km reach with appropriate host FEC
• 1310nm LAN-WDM optical transmission
• Single-mode fiber support
• Duplex LC connector
• Digital Diagnostic Monitoring on supported modules
• Hot-pluggable QSFP28 design
• Designed for data center and enterprise core networks
• Suitable for long-distance 100GbE links

100Gbps High-Speed Connectivity

The QSFP28 ER4L platform provides 100Gbps Ethernet connectivity using four optical channels. Each lane operates at approximately 25Gbps, producing an aggregate 100Gbps data connection.

This makes the module suitable for high-bandwidth applications such as data center interconnection, enterprise core switching, cloud infrastructure and large-scale network aggregation.

40km Long-Distance Reach

The ER4L architecture is designed for extended-reach 100GbE links. Fortinet documentation identifies 100GE ER4 optics with a 40km reach over 1310nm single-mode fiber. :contentReference[oaicite:3]{index=3}

For ER4L implementations, the exact maximum distance depends on the host device, FEC capability, fiber characteristics, connector loss and optical link budget. Cisco's ER4L documentation, for example, distinguishes between 40km operation with host FEC and shorter reach without FEC. :contentReference[oaicite:4]{index=4}

1310nm LAN-WDM Optics

The ER4 architecture uses four wavelengths in the 1310nm optical window. Typical 100GBASE-ER4 implementations use approximately 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm.

Using multiple LAN-WDM wavelengths allows four 25Gbps optical channels to travel over a single pair of single-mode fibers.

Duplex LC Connector

The transceiver uses a Duplex LC optical interface. One fiber carries the transmit signal while the other carries the receive signal.

For long-distance deployment, use compatible single-mode fiber and ensure that connector quality, fiber attenuation and total optical loss remain within the transceiver's supported link budget.

Single-Mode Fiber

The ER4L module is designed for single-mode fiber (SMF) rather than multimode fiber.

For 40km-class links, an appropriate OS2/G.652-compatible single-mode fiber infrastructure is normally required. The actual supported distance depends on the optical budget and complete link design.

QSFP28 Form Factor

The module uses the compact QSFP28 form factor, which provides four high-speed electrical lanes and is widely used for 100GbE switch and router interfaces.

QSFP28 provides significantly greater port density than older CFP-based 100G optical modules, making it well suited to modern data center switching platforms.

Digital Diagnostic Monitoring

Compatible ER4/ER4L optical modules can provide Digital Diagnostic Monitoring (DDM/DOM), allowing network equipment to monitor optical parameters such as temperature, supply voltage, transmit power and receive power.

Actual monitoring capabilities depend on the transceiver firmware and host platform.

Host FEC and 40km Operation

Extended-reach 100GBASE-ER4L links may rely on host Forward Error Correction (FEC) to achieve their maximum specified distance. Cisco documentation specifically identifies 40km ER4L operation with host FEC and a shorter reach without FEC. :contentReference[oaicite:5]{index=5}

Therefore, both ends of a 40km ER4L link should be checked for compatible FEC configuration before deployment.

Data Center Applications

• Data Center Interconnect (DCI)
• Enterprise Core Networking
• High-Speed Server Aggregation
• Cloud Infrastructure
• Campus Core Networks
• Network Backbone Links
• Storage Network Connectivity
• Long-Distance 100GbE Links

100G ER4L vs LR4

100G ER4L vs ZR4

Compatibility Considerations

Optical transceiver compatibility is determined by more than the optical standard. The host switch, router or firewall must support the specific QSFP28 module and its coding/firmware.

• Compatible 100G QSFP28 port
• Compatible Fortinet platform or approved third-party optic
• 100GBASE-ER4/ER4L support
• Single-mode fiber infrastructure
• Duplex LC connectors
• Compatible host FEC configuration for maximum reach
• Appropriate optical link budget

Fortinet specifically provides a method for checking certified transceivers supported by FortiGate through the device's certified-transceiver information. :contentReference[oaicite:6]{index=6}

Important Fortinet SKU Verification

Fortinet's official documentation does not clearly identify QSFP-ER4L-100G as an OEM Fortinet part number. Fortinet documentation instead identifies 100GE ER4 optics such as QSFP28-100G-ER4, while third-party Fortinet-compatible listings use FG-TRAN-QSFP28-ER4. :contentReference[oaicite:7]{index=7}

Therefore, if the physical product label specifically says QSFP-ER4L-100G, it is safer to list it as a Fortinet-compatible QSFP28 100GBASE-ER4L 40km transceiver unless the Fortinet OEM label or purchase documentation confirms the exact OEM SKU.

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies enterprise optical transceivers, QSFP28 modules, network switches, routers, firewalls and data center networking hardware 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 Fortinet QSFP-ER4L-100G?
It is a 100G QSFP28 ER4L-class optical transceiver intended for long-distance 100GbE connectivity over single-mode fiber.

Q2: What is the data rate?
The module operates at 100Gbps Ethernet.

Q3: What is the maximum transmission distance?
ER4L-class optics can reach up to 40km when the complete link supports the required host FEC and optical conditions. :contentReference[oaicite:8]{index=8}

Q4: What wavelength does it use?
The ER4 architecture uses four LAN-WDM wavelengths around the 1310nm window.

Q5: What fiber does it use?
It uses single-mode fiber (SMF).

Q6: What connector does it use?
The optical interface is Duplex LC.

Q7: Is it a QSFP28 module?
Yes. The 100G ER4/ER4L architecture uses the QSFP28 form factor.

Q8: Does it support DOM/DDM?
Compatible ER4/ER4L modules can provide digital optical monitoring. Actual monitoring support depends on the module and host platform.

Q9: Is host FEC required for 40km?
For ER4L implementations, maximum 40km reach can depend on host FEC. Cisco documentation specifies 40km with host FEC and reduced reach without FEC. :contentReference[oaicite:9]{index=9}

Q10: Can it be used for data center interconnection?
Yes. 100G ER4/ER4L optics are suitable for long-distance data center, enterprise core and backbone links.

Q11: Is QSFP-ER4L-100G an official Fortinet OEM part number?
This exact designation could not be verified in Fortinet's public documentation. Fortinet documents 100G ER4 products under designations including QSFP28-100G-ER4 and FG-TRAN-QSFP28-ER4. Verify the physical label before claiming OEM Fortinet status. :contentReference[oaicite:10]{index=10}

Q12: Where can I buy this 100G ER4L transceiver in Bangladesh?
Contact Datacom Technologies (BD) for Fortinet-compatible and enterprise 100G QSFP28 optical transceivers, with compatibility assistance and nationwide delivery.