Category
Compatible 100GBASE-ER4 QSFP28 Optical Transceiver Module for Metro Networks
Product Highlights
*Supports 100G Ethernet transmission up to 40km over single-mode fiber
*Duplex LC interface for long-distance network deployment
*1310nm wavelength with 4WDM optical transmission technology
*Designed for metro networks, carrier transmission, and enterprise backbone applications
*Compliant with IEEE 802.3ba 100GBASE-ER4 and QSFP28 MSA standards
*Digital Diagnostic Monitoring (DDM) support for real-time status monitoring
*Hot-pluggable QSFP28 form factor for easy installation
*Compatible with major switch platforms including Cisco, Arista, Huawei, H3C, Juniper, and Dell
Brand Compatible With 100GBASE-ER4 QSFP28 Transceiver Module(QSFP28 Double Fiber Single-Mode, 100G, 1310nm, 40km, LC, DDM)
The 100GBASE-ER4 optical transceiver is designed for long-distance 100G Ethernet transmission over single-mode fiber. Supporting up to 40km reach with a duplex LC interface, this module provides a reliable solution for metro network connectivity, telecom carrier transmission, enterprise backbone links, and data center extension.
This 100G QSFP28 ER4 optical module uses 4WDM optical transmission technology and is compliant with IEEE 802.3ba 100GBASE-ER4 and QSFP28 MSA standards. With Digital Diagnostic Monitoring (DDM), network operators can monitor optical power, temperature, voltage, and module status in real time.
Compared with 100G LR4 modules, the 100G ER4 transceiver extends the transmission distance from 10km to 40km, making it more suitable for metro edge, ISP backbone, and cross-campus connectivity where longer fiber reach is required.
Product Details
Data Rate | Module Type | Distance | Wavelength | Interface | Temperature | DDM |
100Gb/s | QSFP28 | 40KM | 1310nm | LC | 0~70℃ | Yes |
Specifications
Part Number | QSFP28-100G-ER4 | Brand | Firstoptic |
Form Factor | QSFP28 | Max. Data Rate | 103.125Gbps (4x 25.78Gbps) |
Wavelength | 1310nm | Max. Cable Distance | 40km |
Connector | Duplex LC | Media | SMF |
Transmitter Type | EML | Receiver Type | APD |
TX Power | -2.5~6.5dBm | Minimum Receiver Power | -20.5dBm |
Power Budget | 18dB | Receiver Overload | -3.5dBm |
Power Consumption | ≤4.5W | Extinction Ratio | >4dB |
Core Size | 9um | Modulation | 4x25G NRZ |
Commercial Temperature Range | 0 to 70°C (32 to 158°F) | Protocols | QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4 |
Certification system


Metro Network Connectivity
Deploy this 100GBASE-ER4 optical transceiver for 40km metro network connectivity between aggregation sites, core network locations, and regional data centers.
With single-mode fiber transmission and duplex LC connectivity, the module supports stable 100G links for metro edge networks and high-capacity transport infrastructure.
Carrier Transmission Networks
The 100G QSFP28 ER4 optical module is suitable for carrier-grade transmission networks, ISP backbone infrastructure, and telecom aggregation applications.
It provides extended-reach 100G connectivity for operators upgrading metro rings, mobile transport networks, and long-distance access aggregation systems.


Enterprise Backbone and Data Center Extension
The 100G ER4 transceiver enables high-bandwidth connections between enterprise campuses, remote office locations, and data center facilities.
Compared with LR4 modules, 100G ER4 supports longer 40km reach, making it a better choice for backbone links where standard 10km optics are not sufficient.
Features
Test Equipment
Compatible Test
QC TestHigh Compatibility for all Brands

FAQ Section
Q1: What is the transmission distance of a 100GBASE-ER4 optical transceiver?
A: A 100GBASE-ER4 optical transceiver supports transmission distances up to 40km over single-mode fiber.
Q2: What fiber type is required for 100G ER4?
A: 100G ER4 uses single-mode fiber with a duplex LC interface.
Q3: What is the difference between 100G LR4 and 100G ER4?
A: 100G LR4 supports up to 10km transmission, while 100G ER4 supports up to 40km, making ER4 more suitable for metro and carrier network applications.
Q4: Where is the 100G QSFP28 ER4 optical module commonly used?
A: It is commonly used in metro networks, ISP backbone links, carrier transmission networks, enterprise backbone connections, and data center extension.
Q5: Is the 100G ER4 transceiver compatible with Cisco and Arista switches?
A: Yes. The module can be programmed and tested for compatibility with major platforms including Cisco, Arista, Huawei, H3C, Juniper, and Dell.
Send Message