Introducing Juniper 40G QSFP+ Transceivers

It’s no doubt that 10Gbps speeds for individual streams have been routinely reached under today’s networking environment. And for better network performance, the existing bandwidth has been generated to 40Gbps. Among various network devices designed for 40 Gigabit Ethernet (GbE) links, 40G QSFP+ transceiver are of vital importance in driving the bandwidth to a mounting point. Here this publication puts its focus on the Juniper 40G QSFP+ transceiver, which ensure high density and low latency, as well as small power consumption.

Firstly let’s figure out what is the 40G QSFP+ transceiver.

What Is 40G QSFP+ Transceiver?

The Quad Small Form-factor Pluggable (QSFP) is a compact, hot-pluggable transceiver used for data communications applications. The 40G QSFP+ transceiver is a parallel fiber optical module, using four independent optical transmit and receive channels. It uses a 4 x 10Gb/s link configuration for a 40Gb/s port, offering users high-density 40 Gigabit Ethernet connectivity options for high-performance networks. QSFP+ transceivers can be applied in switches, routers and data center applications. Compared with SFP+ transceivers, QSFP+ transceiver increase the port-density by 3x-4x. Besides, they still enjoy the following features.

Juniper 40G QSFP+ Transceiver Features

Juniper QSFP+ is a Multi-Source Agreement (MSA) for high speed application, such as 40G-BASE, which provide four channels of data in one pluggable interface. Each channel is capable of transferring data at 10Gbps and supports a total of 40Gbps. Juniper 40G QSFP+ transceiver enjoy the following listed key features:

  • QSFP+ MSA, SFF-8436 Compatible;
  • Four Independently Addressable Transmit and Receive Channels;
  • Highly Compact and Electrically Hot-pluggable;
  • Digital Diagnostic Monitoring (DDM) Interface for Better Module Management;
  • Simplified Heat Management With Reduction in Power Consumption;
Two Type of Juniper 40G QSFP+ Transceiver

After discussion on several key features of Juniper 40G QSFP+ transceivers in general, here goes the detailed information about two types of Juniper 40G QSFP+ transceivers: Juniper 40G QSFP+ LX4 transceiver and Juniper 40G QSFP+ LR4 transceiver.

JNP QSFP 40G lx4 Transceiver

The jnp qsfp 40g lx4 transceiver has four 10 Gbps channels, each of which can transmit and receive simultaneously on four wavelengths over a multi-mode fiber (MMF) strand. The result is an aggregated duplex 40 Gbps link over a duplex of two MMF strands. Using duplex LC connectors, QSFP+ LX4 connections can reach 100 meters on OM3 MMF or 150 meters on OM4 MMF. What’s more, this Juniper QSFP+ LX4 transceiver (JNP-QSFP-40G-LX4) addresses the challenges of fiber infrastructure by providing the ability to transmit full-duplex 40Gbps traffic over one duplex MMF cable with LC connectors. In other words, the Juniper QSFP+ LX4 transceiver, a short-reach optical transceiver that delivers 40Gbps over duplex OM3 or OM4 MMF, allows 40Gbps connectivity to connect directly to the 10Gbps fiber and fiber trunk.

Juniper 40G QSFP+ LR4 Transceiver

For Juniper 40G QSFP+ LR4 transceiver, JNP-QSFP-40G-LR4 enables high speed 4 x 10G operations. It’s designed for use in 40 Gigabit Ethernet links over single mode fiber (SMF) with Duplex LC connectors. Compliant with the QSFP+ MSA and IEEE 802.3ba, JNP-QSFP-40G-LR4 is RoHS-6 compliant with built-in DDM interface. Fiberstore compatible Juniper JNP-QSFP-40G-LR4 is intended to support up to 10km over a standard pair of G.652 SMF.

Juniper 40G QSFP+ Transceivers Applications

The Juniper 40G QSFP+ transceivers are well suited for Infiniband, 40GBASE-SR4, 40GBASE-LR4 applications, suitable for short reaches among switches, routers and data center devices. Combined with right fanout cables, these modules can interface up to four SFP+ transceivers.


Juniper 40G QSFP+ transceiver boast of high-density features and provide users with 40Gbps connectivity for better network performances. Fiberstore supplies various Juniper 40G QSFP+ transceiver which are quality and performance assured, such as JNP-QSFP-40G-LX4 and JNP-QSFP-40G-LR4 mentioned above. Please feel free to contact us for more information about Fiberstore 40G QSFP+ transceiver compatible with Juniper.