Juniper QSFP-100GBASE-LR4 Optical Transceiver

About Juniper QSFP-100GBASE-LR4 100G Optical Transceiver in Bangladesh

The Juniper QSFP-100GBASE-LR4 is a 100 Gigabit Ethernet QSFP28 optical transceiver designed for high-speed network connectivity over single-mode fiber. Based on the 100GBASE-LR4 standard, it supports transmission distances of up to 10 km using duplex LC fiber connectivity.

Juniper identifies QSFP-100GBASE-LR4 with part number 740-058732. The module uses the QSFP28 form factor, provides 100 Gigabit Ethernet connectivity, uses a Duplex LC PC/UPC connector and supports Digital Optical Monitoring. Juniper also identifies QSFP-100G-LR4-C as the common optic equivalent. :contentReference[oaicite:1]{index=1}

Juniper QSFP-100GBASE-LR4 Specifications & Features

Overview

The Juniper QSFP-100GBASE-LR4 is designed for 100GbE network links where long-reach single-mode fiber connectivity is required. The LR4 optical architecture uses four 25Gbps optical lanes and wavelength-division multiplexing over a duplex single-mode fiber connection.

Juniper's current 100G optics documentation describes LR4 as a four-lane optical interface using duplex single-mode fiber with a maximum reach of 10 km. The QSFP28 LR4 architecture uses 4 × 25Gbps NRZ optical lanes. :contentReference[oaicite:2]{index=2}

Buy Juniper QSFP-100GBASE-LR4 in Bangladesh

Purchase the Juniper QSFP-100GBASE-LR4 100GBASE-LR4 QSFP28 Optical Transceiver from Datacom Technologies (BD). We supply Juniper optical transceivers, QSFP28 modules, network switches, routers and enterprise data center networking equipment in Bangladesh with competitive pricing, technical consultation and nationwide delivery.

Key Features

• 100 Gigabit Ethernet connectivity
• 100GBASE-LR4 optical standard
• QSFP28 form factor
• Up to 10 km transmission distance
• Single-mode fiber connectivity
• Duplex LC PC/UPC connector
• Four 25Gbps optical lanes
• LAN-WDM optical technology
• Digital Optical Monitoring support
• Real-time optical monitoring capabilities
• No breakout capability
• Standard 0°C to 70°C operating temperature
• Suitable for compatible Juniper networking platforms

100GBASE-LR4 Optical Technology

The QSFP-100GBASE-LR4 uses the 100GBASE-LR4 standard for 100GbE transmission over single-mode fiber. LR4 uses four optical lanes operating at approximately 25Gbps each, with multiple wavelengths multiplexed over a duplex fiber connection.

Juniper's 2026 optics guide identifies LR4 as a four-lane 25Gbps-per-lane optical interface using duplex single-mode fiber and supporting a maximum reach of 10 km. :contentReference[oaicite:3]{index=3}

10 km Transmission Distance

The LR4 designation is intended for longer-reach 100GbE connections compared with short-range multimode optics such as SR4.

The Juniper QSFP-100GBASE-LR4 supports a maximum transmission distance of 10 km over compatible single-mode fiber. This makes it suitable for data center interconnects, campus networks, metro links and other high-speed network deployments where the link distance exceeds typical multimode-fiber reach.

Single-Mode Fiber Connectivity

The QSFP-100GBASE-LR4 is designed for single-mode fiber (SMF). Juniper's LR4 architecture uses two fibers in a duplex configuration: one transmit path and one receive path.

Use compatible single-mode fiber cabling terminated with Duplex LC connectors. The exact optical link budget and achievable distance depend on fiber quality, connectors, patch panels, attenuation and the characteristics of the connected equipment.

Duplex LC PC/UPC Connector

Juniper's Hardware Compatibility Tool specifies a Duplex LC PC/UPC connector for QSFP-100GBASE-LR4. :contentReference[oaicite:4]{index=4}

The duplex LC interface provides separate optical transmit and receive paths and is commonly used for single-mode 100GbE LR4 connections.

Four-Lane 25Gbps Architecture

The LR4 optical interface uses four optical lanes, with each lane operating at approximately 25Gbps. The four optical channels are multiplexed using LAN-WDM technology and transmitted over a duplex single-mode fiber connection.

Juniper's current documentation identifies the LR4 optical interface as a 4 × 25Gbps NRZ architecture. :contentReference[oaicite:5]{index=5}

LAN-WDM Technology

Unlike 100G SR4, which uses parallel multimode fibers, LR4 uses wavelength-division multiplexing to carry four optical channels over a duplex single-mode fiber connection.

This architecture allows the QSFP28 module to achieve a 10 km reach while using only two optical fibers.

Optical Wavelengths

The QSFP-100GBASE-LR4 uses four LAN-WDM wavelengths in the approximately 1310nm optical window. The documented transmitter wavelength ranges are approximately:

• 1294.53nm – 1296.59nm
• 1299.02nm – 1301.09nm
• 1303.54nm – 1305.63nm
• 1308.09nm – 1310.19nm

These wavelength ranges correspond to the four optical channels used by the 100GBASE-LR4 architecture.

QSFP28 Form Factor

The Juniper QSFP-100GBASE-LR4 uses the QSFP28 form factor. Juniper identifies the module as a QSFP28 optical transceiver in its Hardware Compatibility Tool. :contentReference[oaicite:6]{index=6}

QSFP28 is widely used for 100GbE network interfaces and provides a compact pluggable form factor suitable for high-density switches, routers and data center networking equipment.

Digital Optical Monitoring

The QSFP-100GBASE-LR4 supports Digital Optical Monitoring (DOM). Juniper's Hardware Compatibility Tool identifies both monitoring availability and Digital Optical Monitoring support for this module. :contentReference[oaicite:7]{index=7}

DOM can provide operational information about the optical module, including parameters such as optical transmit and receive power, temperature and other supported diagnostic values.

No Breakout Capability

Juniper specifies the QSFP-100GBASE-LR4 as not breakout capable. :contentReference[oaicite:8]{index=8}

This module is therefore intended to operate as a single 100GbE optical connection rather than being divided into four independent 25GbE interfaces.

Operating Temperature

The standard Juniper QSFP-100GBASE-LR4 configuration is designed for a 0°C to 70°C operating temperature range.

For installations requiring extended or industrial temperature operation, select the appropriate Juniper LR4 variant rather than assuming the standard-temperature module is suitable.

Power Consumption

The documented QSFP-100GBASE-LR4 specification lists a maximum power consumption of approximately 3.5W.

Actual system-level power consumption can vary depending on host platform, operating conditions and optical traffic.

CAUI-4 Electrical Interface

Juniper's current 100G optics documentation identifies 100G LR4 as using the legacy CAUI-4 electrical interface with four 25Gbps lanes and no FEC at the electrical interface. :contentReference[oaicite:9]{index=9}

This differentiates traditional 100GBASE-LR4 QSFP28 optics from newer 100G optical technologies using PAM4 and other electrical interfaces.

Juniper Compatibility

Juniper's Hardware Compatibility Tool identifies QSFP-100GBASE-LR4 as a supported 100GbE QSFP28 optical module. Juniper platform documentation shows the part number 740-058732 in multiple compatible networking platforms. :contentReference[oaicite:10]{index=10}

For example, Juniper documentation identifies QSFP-100GBASE-LR4 on platforms including the MX204, with the module shown under its 740-058732 part number. :contentReference[oaicite:11]{index=11}

Compatibility should always be verified against the exact Juniper platform, FPC/PIC, interface module and Junos/Junos Evolved release before purchase.

Common Optic Equivalent

Juniper's Hardware Compatibility Tool identifies QSFP-100G-LR4-C as the common optic equivalent of QSFP-100GBASE-LR4. :contentReference[oaicite:12]{index=12}

When sourcing replacement optics, verify the exact Juniper ordering code required by the host platform and existing network BOM rather than assuming every LR4-labelled module is interchangeable.

100G LR4 vs 100G SR4

Juniper's 2026 documentation specifies LR4 for duplex single-mode fiber up to 10 km, while SR4 uses parallel multimode fiber and reaches up to 70m on OM3 or 100m on OM4. :contentReference[oaicite:13]{index=13}

Data Center Applications

The Juniper QSFP-100GBASE-LR4 is suitable for high-bandwidth network applications requiring 100GbE connectivity over single-mode fiber.

• Data center interconnects
• Core network links
• Aggregation networks
• Enterprise backbone networks
• Metro network connections
• Cloud infrastructure
• High-performance computing networks
• Service provider networks
• Long-distance data center links
• 100GbE router and switch uplinks

Enterprise Network Deployment

100GbE LR4 optics are useful when network equipment is separated by distances beyond the practical reach of short-range multimode optics. Using single-mode fiber allows the same 100GbE connection to span significantly greater distances.

The duplex LC connection also makes LR4 suitable for structured fiber installations where LC patching is preferred.

Optical Link Considerations

For reliable 100GbE LR4 operation, the complete optical link should be designed around compatible single-mode fiber, connectors and optical budgets.

• Use compatible single-mode fiber
• Use Duplex LC PC/UPC connectivity
• Verify optical loss across the complete link
• Check transmitter and receiver power levels
• Confirm host-port compatibility
• Verify Juniper software and hardware support
• Use matching or interoperable LR4 optics at both ends

Benefits

• 100GbE network connectivity
• 10 km single-mode fiber reach
• QSFP28 high-density form factor
• Duplex LC connectivity
• Four-lane 25Gbps optical architecture
• LAN-WDM technology
• Digital Optical Monitoring
• Suitable for compatible Juniper platforms
• Ideal for data center and backbone applications
• Designed for long-reach 100GbE links

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies Juniper optical transceivers, QSFP28 modules, network switches, routers, fiber connectivity products and enterprise data center networking equipment in Bangladesh. Customers can receive competitive pricing, technical consultation, deployment assistance 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 Juniper QSFP-100GBASE-LR4?
The Juniper QSFP-100GBASE-LR4 is a 100GBASE-LR4 QSFP28 optical transceiver designed for 100 Gigabit Ethernet connectivity over single-mode fiber.

Q2: What is the Juniper part number?
The Juniper part number is 740-058732. :contentReference[oaicite:14]{index=14}

Q3: What is the data rate?
The module supports 100 Gigabit Ethernet. :contentReference[oaicite:15]{index=15}

Q4: What optical standard does it use?
It uses the 100GBASE-LR4 optical standard.

Q5: What is the maximum transmission distance?
The LR4 architecture supports up to 10 km over compatible single-mode fiber. :contentReference[oaicite:16]{index=16}

Q6: What connector does it use?
Juniper specifies a Duplex LC PC/UPC connector. :contentReference[oaicite:17]{index=17}

Q7: Does it use single-mode or multimode fiber?
The QSFP-100GBASE-LR4 uses single-mode fiber (SMF).

Q8: Is QSFP-100GBASE-LR4 QSFP28?
Yes. Juniper identifies its form factor as QSFP28. :contentReference[oaicite:18]{index=18}

Q9: Does QSFP-100GBASE-LR4 support breakout?
No. Juniper explicitly identifies the module as not breakout capable. :contentReference[oaicite:19]{index=19}

Q10: Does it support Digital Optical Monitoring?
Yes. Juniper identifies both monitoring availability and Digital Optical Monitoring support. :contentReference[oaicite:20]{index=20}

Q11: What is the common Juniper optic equivalent?
Juniper's Hardware Compatibility Tool identifies QSFP-100G-LR4-C as the common optic equivalent. :contentReference[oaicite:21]{index=21}

Q12: What is the operating temperature?
The standard QSFP-100GBASE-LR4 specification operates from 0°C to 70°C.

Q13: What is the maximum power consumption?
The documented maximum power consumption is approximately 3.5W.

Q14: Is QSFP-100GBASE-LR4 compatible with Juniper routers and switches?
Yes, it is a Juniper optical transceiver listed in the Juniper Hardware Compatibility Tool and supported on multiple Juniper networking platforms. Exact compatibility depends on the platform, interface module and software release. :contentReference[oaicite:22]{index=22}

Q15: Is QSFP-100GBASE-LR4 suitable for data center interconnects?
Yes. Its 100GbE bandwidth and 10 km single-mode fiber reach make it suitable for longer-distance data center, backbone and aggregation links.

Q16: Where can I buy Juniper QSFP-100GBASE-LR4 in Bangladesh?
You can contact Datacom Technologies (BD) for Juniper QSFP28 transceivers, 100GbE optics, networking equipment and enterprise data center hardware with competitive pricing and nationwide delivery.