Skip to content


by Juniper
Product Line: Juniper EX4400 Series
Sold out
Original price $0.00 - Original price $0.00
Original price
$0.00 - $0.00
Current price $0.00
Title: Surplus

Orders typically ship within 1-3 Business days, if you need an item to ship sooner please contact us.

Product Description

The EX4400-EM-4S is an extension module featuring 4-port 1GbE/10GbE SFP+ options, designed to enhance connectivity and network scalability. It supports a 400 Gbps Virtual Chassis interconnect allowing up to 10 units to function as a single logical device, enhancing network efficiency and management. The module is equipped with 4 GB DRAM with ECC, a 20 GB storage capacity, and operates within a temperature range of 32° F to 113° F, ensuring reliable performance under various environmental conditions.

FAQs for the EX4400-EM-4S

  • What is the part number for the 4-port 1GbE/10GbE SFP+ Extension Module?
    The part number is EX4400.
  • How many units can be combined using the Virtual Chassis interconnect?
    Up to 10 units can be combined as a single logical device using the 400 Gbps Virtual Chassis interconnect.
  • What are the dimensions of the EX4400 with power supply and fans installed?
    Dimensions are 17.39 x 1.72 x 16.93 inches (44.17 x 4.37 x 43 cm).
  • What is the maximum number of MAC addresses supported per system?
    The system supports up to 112,000 MAC addresses.
  • How much does the EX4400 switch weigh without the power supply or fan module?
    The weight is 13.01 lb (5.9 kg).
  • What is the operating temperature range for the EX4400?
    The operating temperature range is 32° F to 113° F.
  • How many field-replaceable fans does the EX4400 have?
    There are 2 field-replaceable fans.
  • What is the maximum inrush current for the EX4400?
    The maximum inrush current is 30 amps.
  • What is the storage capacity available on all EX4400 models?
    All models come with 20 GB of storage.
  • What is the maximum operating altitude for the EX4400?
    The maximum operating altitude is up to 10,000 ft (3,049 m).

Product Review

The Juniper EX4400-EM-4S extension module offers a versatile 4-port 1GbE/10GbE SFP+ option, enhancing connectivity and network expansion capabilities. Its notable feature is the 400 Gbps Virtual Chassis interconnect allowing up to 10 units to work as a single device, significantly simplifying network management and scalability. However, the module's maximum current inrush of 30 amps may require careful power management planning in high-density deployments to avoid potential power distribution issues.


The Juniper EX4400-EM-4S is a high-performance extension module designed for advanced networking requirements. It features four ports that support 1GbE/10GbE SFP+ connections, providing flexibility and scalability for various network environments. This module is part of the EX4400 series, known for its capability to enhance network efficiency and reliability. One of the module's key specifications is its maximum current inrush of 30 amps, ensuring stable and reliable power delivery to support high-volume network traffic. It integrates seamlessly with the backplane, offering a 400 Gbps Virtual Chassis interconnect. This allows up to 10 units to be combined as a single logical device, significantly expanding network capacity and simplifying management. Physically, the module measures 17.39 inches in width, 1.72 inches in height, and 16.93 inches in depth, fitting comfortably in a standard 1U rack space. Despite its compact size, it maintains a lightweight design at just 0.2 lb, making it easy to install and manage. The system is equipped with two field-replaceable fans, each weighing 0.26 lb, ensuring optimal cooling and operational longevity. The device supports a maximum of 112,000 MAC addresses per system and accommodates jumbo frames up to 9216 Bytes, enhancing its capability to handle large volumes of data efficiently. It operates reliably within a temperature range of 32°F to 113°F and can be stored in temperatures as low as -40°F up to 158°F. Its operational altitude reaches up to 10,000 feet, with a non-operating altitude limit of 16,000 feet, ensuring it performs in various environmental conditions. Additional hardware specifications include: - DRAM: 4 GB with Error Correcting Code (ECC) across all models, ensuring data integrity and system reliability. - Storage: A 20 GB internal storage on all models provides ample space for network configuration and system files. - Power Supply: Designed for efficiency, only a minimum of one power supply unit is required for a fully loaded chassis, optimizing power consumption. Furthermore, the EX4400-EM-4S maintains operational efficiency with relative humidity tolerance ranging from 0% to 95% non-condensing when not in operation, and 0% to 90% non-condensing during operation. This tolerance ensures the module's reliability across various humidity levels. In summary, the Juniper EX4400-EM-4S extension module is a compact, lightweight, and high-capacity networking solution. It is designed to meet the demands of modern networks with its support for high-speed connections, scalability through Virtual Chassis technology, and robust environmental tolerances. Whether for expanding an existing network or deploying a new one, this module provides a reliable foundation for high-performance networking. - 4-port SFP+ support for 1GbE/10GbE connections. - 400 Gbps Virtual Chassis interconnect allows combining up to 10 units. - Compact and lightweight design with field-replaceable components for easy maintenance.


Item Number Juniper EX4400-EM-4S
Manufacturer Juniper Networks
Module Type 4-port 1GbE/10GbE SFP+ Expansion Module
Expansion Options 4 SFP+ ports
Peak Current 30A
Backplane Speed 400 Gbps Virtual Chassis link, supporting up to 10 interconnected devices
Dimensions 17.39 x 1.72 x 16.93 inches (44.17 x 4.37 x 43 cm)
Form Factor 1U height
Weight 0.2 pounds (0.09 kg)
Replaceable Fan Units 2
Fan Weight 0.26 pounds (0.12 kg)
MAC Address Capacity 112,000 addresses
Maximum Frame Size 9216 bytes
Operating Temperature Range 32° F to 113° F
Storage Temperature Range -40° F to 158° F
Max Operating Altitude 10,000 feet (3,049 m)
Max Non-operating Altitude 16,000 feet (4,877 m)
Humidity Range (Non-operating) 0% to 95%
Switch Weight (Without PSU or Fans) 13.01 pounds (5.9 kg)
Memory 4 GB DRAM with ECC
Internal Storage 20 GB
Minimum PSUs for Full Operation 1 per unit
Non-operating Humidity Range 0% to 90%

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare