740-061405 Juniper Networks 100 Gigabit Ethernet QSFP-28 Transceiver.

Juniper Networks 740-061405 QSFP-28 100G-SR4 Optical Transceiver Overview

The Juniper Networks 740-061405 QSFP-28 is a high-performance optical transceiver designed for modern enterprise and data center networks. Engineered for reliable 100 Gigabit Ethernet connections, this module delivers exceptional speed, efficiency, and network monitoring capabilities. Ideal for high-density network deployments, it ensures low-latency data transfer over multimode fiber.

Technical Summary

• Part Number: 740-061405
• Brand: Juniper Networks
• Module Type: Optical Transceiver
• Speed: 100G Ethernet (4 × 25G lanes)
• Connector: MPO-12
• Distance: 70 km (OM3), 100 m (OM4)
• Power Consumption: 3.5W

Key Features and Capabilities

• High-Speed Data Transmission: Supports 4 × 25 Gigabit lanes, achieving a total of 100Gbps throughput.
• Breakout Functionality: Enables flexible network designs by splitting a 100G port into multiple 25G connections.
• QSFP28 Form Factor: Compact, hot-swappable design suitable for dense switch and router ports.
• Connector Type: MPO-12 interface for easy fiber connectivity.
• Advanced Monitoring: Includes digital optical monitoring (DOM) for real-time performance tracking.

Performance and Signal Specifications

• Standard Compliance: Fully adheres to IEEE 802.3ba-2010 Ethernet standards.
• Signaling Rate: 25.78125 Gbd per lane, ensuring precise and stable data transmission.
• Transmitter Wavelength: Operates in the 840–860 nm range for optimal short-range performance.
• Receiver Wavelength Range: 840–860 nm to match transmitter output for minimal signal loss.

Power and Optical Performance

• Transmitter Output Power: From –8.4 dBm (minimum) to 2.4 dBm (maximum) per lane.
• Receiver Input Power: Ranges from –10.3 dBm to 2.4 dBm per lane for reliable signal reception.
• Maximum Power Consumption: Low energy footprint at only 3.5W, enhancing energy efficiency in large-scale deployments.

Fiber and Distance Capabilities

• Compatible Fiber Types: Supports OM3 and OM4 multimode fibers with a 50/125 µm core/cladding ratio.
• Maximum Transmission Distance: Up to 70 km on OM3 fibers and 100 m on OM4 fibers, suitable for varied network topologies.
• Effective Modal Bandwidth: 2000 MHz·km (OM3) and 4700 MHz·km (OM4) to ensure signal integrity over distance.

Environmental and Operational Specifications

• Operating Temperature Range: 0°C to 70°C, accommodating standard data center environments.
• Storage Temperature: –40°C to 85°C for safe handling and transportation.
• Durability: Designed for long-term stability and high-reliability network performance.

Diagnostic and Monitoring Features

• Digital Optical Monitoring (DOM): Provides real-time feedback on optical power, temperature, and signal integrity.
• Diagnostic Support: Enables predictive maintenance and rapid fault detection to reduce downtime.

Applications and Use Cases

• High-performance data center uplinks and aggregation layers.
• Enterprise campus networks requiring high-speed optical connectivity.
• Cloud service provider infrastructure with dense 100G deployment.
• Telecom networks needing reliable, long-distance short-range optical links.

Juniper Networks 740-061405 Overview

The Juniper Networks 740-061405 100 Gigabit Ethernet QSFP-28 100G-SR4 Optical Transceiver Module is a high-performance solution designed for modern data centers, enterprise networks, and high-speed computing environments. Engineered to deliver robust 100 Gigabit Ethernet connectivity, this module ensures low latency, high bandwidth, and reliable data transfer across short-range network links.

This optical transceiver module is part of Juniper’s advanced networking portfolio and supports the QSFP-28 form factor, which is widely recognized for its compact design, energy efficiency, and compatibility with high-density network switches.

Key Features of the 740-061405 Module

• Supports 100G Ethernet data rate for ultra-fast network performance.
• Compliant with the QSFP-28 100G-SR4 standard for short-range optical connections.
• Operates over multimode fiber (MMF) for distances up to 100 meters using OM4 fiber.
• Hot-swappable design for easy installation and maintenance.
• Low power consumption, typically less than 4.5 Watts.
• Compatible with a wide range of Juniper network switches and routers.
• Advanced Digital Diagnostics Monitoring (DDM) for real-time performance monitoring.

Physical Specifications

The 740-061405 module follows the QSFP-28 specification, offering a compact form factor ideal for high-density racks. Its dimensions are approximately 18.35 mm x 72.5 mm x 8.5 mm, allowing network administrators to maximize switch port usage without compromising airflow or performance. The module is designed to operate in standard ambient temperatures from 0°C to 70°C, making it suitable for most data center environments.

Electrical and Optical Performance

• Data Rate: 103.125 Gbps aggregate, 25.78125 Gbps per lane
• Transmission Distance: Up to 100 meters on OM4 multimode fiber
• Wavelength: 850 nm multimode VCSEL lasers
• Power Consumption: Typical 4.5W, maximum 5.5W
• Signal Integrity: Built-in error correction and pre-emphasis for reliable communication

Compatibility and Applications

The Juniper 740-061405 QSFP-28 transceiver is compatible with a variety of Juniper switches and routers, including high-performance aggregation and core devices. This module is particularly beneficial in the following scenarios:

• Data centers requiring high-bandwidth, low-latency connections for cloud computing and virtualization.
• Enterprise networks seeking to upgrade from 10G/40G infrastructure to 100G connectivity.
• High-performance computing (HPC) clusters demanding ultra-fast interconnects.
• Telecommunication networks implementing high-speed metro Ethernet services.

Network Deployment Considerations

When deploying the 740-061405 module, several factors ensure optimal performance:

• Fiber Type: Use OM4 multimode fiber for maximum transmission distance.
• Patch Panels and Cabling: Ensure compatible MPO/MTP cabling for 100G-SR4 connections.
• Temperature and Environment: Operate within recommended data center conditions to prevent overheating.
• Port Configuration: Configure switches to support 100G full-duplex communication.

Benefits of Using Juniper QSFP-28 Transceivers

Investing in the Juniper Networks 740-061405 module offers several advantages for businesses and data center operators:

1. High-Speed Connectivity

With support for 100 Gigabit Ethernet, organizations can handle intensive data workloads and future-proof their network infrastructure. The module enables faster data replication, virtualization, and cloud integration.

2. Energy Efficiency

The low-power QSFP-28 design minimizes energy consumption compared to traditional 100G modules. Efficient power management translates into lower operational costs and reduced heat generation in high-density network environments.

3. Ease of Installation and Maintenance

Hot-swappable design allows technicians to replace or install modules without shutting down the network. Additionally, the integrated DDM function provides real-time feedback on temperature, voltage, and optical signal performance, simplifying troubleshooting.

4. Reliability and Longevity

Juniper’s stringent quality standards ensure the 740-061405 module delivers consistent performance under demanding network conditions. This reliability reduces downtime and enhances overall network stability.

Advanced Digital Diagnostics Monitoring (DDM)

DDM enables network administrators to continuously monitor the health and performance of the optical transceiver. Key monitored parameters include:

• Optical output power
• Optical input power
• Temperature of the module
• Supply voltage
• Transmitter and receiver bias currents

This monitoring capability allows proactive maintenance and prevents potential network failures before they occur.

Integration with Juniper Network Management Tools

The 740-061405 QSFP-28 module is fully compatible with Juniper’s network management software. Integration with tools like Junos Space Network Director allows administrators to:

• Monitor traffic and optical performance in real-time
• Perform predictive maintenance and fault analysis
• Automate network configuration for rapid deployment

QSFP-28 Form Factor Advantages

The QSFP-28 form factor provides a scalable and flexible solution for 100G networking:

• High Port Density: Compact size allows more ports per rack unit, maximizing switch capacity.
• Forward Compatibility: Supports both 100G-SR4 and lower-speed breakout configurations such as 4x25G.
• Thermal Efficiency: Designed for optimal airflow and reduced thermal impact in dense environments.

Breakout Capability

The QSFP-28 module supports 4x25G breakout, providing flexibility for network upgrades and scaling. Administrators can convert one 100G port into four 25G links, enabling mixed-speed network topologies without additional hardware.

Deployment in Data Centers

High-performance data centers benefit from deploying Juniper 740-061405 modules in several ways:

• Cloud Services: Supports high-throughput applications and virtual machine migration.
• Storage Area Networks (SAN): Enables fast, low-latency data transfer between storage arrays.
• High-Frequency Trading Networks: Minimizes latency for financial applications requiring millisecond-level response times.

Enterprise Network Upgrades

Organizations upgrading from legacy 10G or 40G networks can leverage the 740-061405 module for seamless migration. It offers:

• Backward compatibility with existing fiber infrastructure
• Support for high-bandwidth applications like video conferencing and large file transfers
• Cost-effective scaling without replacing existing switches

Telecommunication Network Applications

Telecom operators increasingly deploy 100G QSFP-28 modules to meet growing bandwidth demands. Typical use cases include:

• Metro Ethernet services connecting multiple enterprise sites
• High-capacity backhaul for mobile networks
• Data aggregation at regional and national network hubs

Future-Proofing Networks

Deploying Juniper 740-061405 modules positions organizations for future growth. The 100G capability ensures compatibility with evolving data center standards, supporting cloud adoption, AI workloads, and next-generation networking applications.