Cisco Compatible 40G QSFP+ ER4 Optical Transceiver Module

QSFP-40G-ER4

QSFP-40GB-ER4 is a high-performance optical transceiver designed for extended-reach single-mode fiber transmission, featuring high capacity, ultra-long distance connectivity, and high-density deployment. Utilizing Wavelength Division Multiplexing (WDM) technology, this module supports 40G data transmission over distances of up to 40 km on single-mode fiber. Fully compliant with the IEEE 802.3ba Ethernet standard, the QSFP-40GB-ER4 ensures seamless compatibility with existing network infrastructure, enabling smooth network upgrades without the need for architectural overhauls.

Product Highlights
*Up to 40km transmission over single mode fiber
*Duplex LC interface with CWDM technology
*Compliant with IEEE 802.3ba and QSFP+ MSA
*Designed for telecom and metro networks
*Ideal for enterprise backbone connectivity
*Digital Diagnostic Monitoring (DDM) support
*Hot-pluggable QSFP+ form factor
*Compatible with Cisco, Huawei, H3C, Arista, and Juniper
*Suitable for long-distance 40G network deployment

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40GBASE-ER4 QSFP+ Optical Transceiver Module (40G, 1310nm, 40km, Duplex LC, DDM)

The 40GBASE-ER4 QSFP+ optical transceiver supports 40GbE transmission up to 40km over duplex LC single mode fiber.
Using CWDM technology and four optical wavelengths (1271nm, 1291nm, 1311nm, and 1331nm), it provides stable long-distance connectivity for telecom networks, metro network infrastructure, and enterprise backbone applications.
The module is compliant with IEEE 802.3ba and QSFP+ MSA standards and supports Digital Diagnostic Monitoring (DDM) for real-time performance monitoring.

Product Details

Part Number：QSFP-40G-ER4

Description：40G QSFP+ optical transceiver, duplex LC, single mode fiber, 1310nm CWDM, 40km, DDM

Compatible with：Cisco, Huawei, H3C, Arista, Juniper, Dell

Data Rate	Module Type	Distance	Wavelength	Interface	Temperature	DDM
40Gb/s	QSFP+	40KM	1310nm	LC	0~70℃	Yes

Specifications

Part Number	QSFP-40G-ER4	Brand	Firstoptic
Form Factor	QSFP+	Max. Data Rate	44.6Gbps (4x 11.2Gbps)
Wavelength	1310nm	Max. Cable Distance	40km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB CWDM	Receiver Type	APD
TX Power	-2.7~4.5dBm	Receiver Sensitivity	<-21.2dBm
Power Budget	18.5dB	Receiver Overload	-4.5dBm
Power Consumption	≤3.5W	Extinction Ratio	>5.5dB
Core Size	9um	Modulation	NRZ
Commercial Temperature Range	0 to 70°C (32 to 158°F)	Protocols	OTN OTU3, 40G Ethernet, SATA/SAS3, MSA Compliant

Certification system

Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.

Application Scenarios

Metro Network Connectivity

The 40GBASE-ER4 optical transceiver supports reliable 40GbE transmission up to 40km over single mode fiber.
It is widely deployed in metro network infrastructure to connect aggregation sites, core network nodes, and regional network facilities.

Enterprise Backbone Extension

The 40G QSFP+ ER4 optical module enables long-distance connectivity between enterprise campuses, headquarters, branch offices, and remote facilities.
Its 40km transmission reach provides a cost-effective solution for extending high-speed backbone links over existing single mode fiber infrastructure.

Features

Before shipping, every 40G QSFP+ ER4 optical transceiver undergoes comprehensive testing to ensure stable performance, compatibility, and long-term reliability. Our quality control process includes optical parameter verification, switch compatibility validation, and environmental stress testing.

40g er4 optical transceiver optical parameter and signal integrity testing equipment

Test Equipment

40g qsfp+ er4 compatibility validation with enterprise network switches

Compatible Test

40gbase-er4 environmental reliability and temperature chamber quality control test

QC Test

High Compatibility for all Brands

The 40G QSFP+ ER4 optical transceiver is fully compatible with major network equipment vendors,

including Cisco, Arista, NVIDIA, Huawei, H3C, Juniper, Dell, HPE, ZTE, FiberHome, Ruijie, and more.

40g qsfp+ er4 compatible with Cisco Arista Huawei H3C Juniper and other network equipment brands

FAQ Section

Q1: What is a 40GBASE-ER4 optical transceiver?
A: The 40GBASE-ER4 optical transceiver is a long-range 40G optical module that supports transmission distances up to 40km over single mode fiber. It is widely used in telecom, metro, and enterprise backbone networks.

Q2: What fiber is required for a 40G QSFP+ ER4 module?

A: A 40G QSFP+ ER4 module requires OS2 single mode fiber with duplex LC connectors. Multimode fiber is not supported for 40km transmission.

Q3: What is the maximum transmission distance of a 40G ER4 optical transceiver?

A: A standard 40G ER4 optical transceiver supports transmission distances up to 40km using duplex LC single mode fiber and CWDM technology.

Q4: What applications are suitable for a 40GBASE-ER4 optical transceiver?
A: The 40GBASE-ER4 optical transceiver is commonly deployed in:

Telecom backbone networks
Metro network connectivity
Enterprise backbone networks
Carrier Ethernet transport
Data center extension links

Q5: Is the 40G QSFP+ ER4 optical transceiver compatible with Cisco switches?

A: Yes. The 40G QSFP+ ER4 optical transceiver can be programmed for compatibility with Cisco, Huawei, H3C, Arista, Juniper, Dell, and other major networking platforms.

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