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by Juniper
Product Line: Juniper EX4400 Series
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Product Description

The EX4400-48T-AFI is equipped with 48-port 10/100/1000BASE-T access ports and supports up to 3 100GbE/40GbE ports with an additional module. It features a 550 W AC power supply and AFO (Back-to-front airflow) for efficient cooling. The switch offers a 400 Gbps Virtual Chassis interconnect capacity, enabling up to 10 units to function as a single device, and supports a packet switching capacity of 348 Gbps (unidirectional)/696 Gbps (bidirectional) with a throughput of 517Mpps.

FAQs for the EX4400-48T-AFI

  • What is the port configuration of the EX4400 switch?
    The EX4400 switch features a 48-port 10/100/1000BASE-T configuration.
  • How many 100GbE/40GbE ports does the EX4400 support?
    It supports 2 100GbE/40GbE ports, expandable to 3 with an additional module.
  • What is the power supply rating for the EX4400 switch?
    The power supply is rated at 550 W AC.
  • Describe the airflow orientation of the EX4400.
    The EX4400 has AFO (Back-to-front airflow) orientation.
  • Can the EX4400 be integrated into a Virtual Chassis configuration?
    Yes, it supports a 400 Gbps Virtual Chassis interconnect to combine up to 10 units as a single logical device.
  • What are the physical dimensions of the EX4400 with its power supply and fans installed?
    The dimensions are 17.39 x 1.72 x 16.93 inches (44.17 x 4.37 x 43 cm).
  • What is the system weight of the EX4400 switch?
    The system weight is 1.76 lb (0.8 kg).
  • How many field-replaceable fan modules does the EX4400 have, and what is their weight?
    It has 2 field-replaceable fans, with each fan module weighing 0.26 lb (0.12 kg).
  • What are the packet switching capacities of the EX4400?
    The packet switching capacities are 348 Gbps (unidirectional) and 696 Gbps (bidirectional).
  • What temperature ranges can the EX4400 operate and be stored in?
    It operates between 32°F and 113°F and can be stored between -40°F and 158°F.

Product Review

The Juniper EX4400-48T-AFI switch offers a high-performance solution with a 400 Gbps Virtual Chassis interconnection capability, enabling up to 10 units to function as a single device, enhancing scalability and management. However, its 550 W AC power supply may limit expansion in power-intensive environments. Additionally, the switch provides substantial packet switching capacities of 348 Gbps (unidirectional)/696 Gbps (bidirectional) and a throughput of 517 Mpps, supporting high-volume network traffic efficiently.


The Juniper EX4400-48T-AFI is a high-performance, scalable networking solution designed for demanding enterprise environments. This switch offers a comprehensive feature set that includes 48 10/100/1000BASE-T ports, catering to a wide range of connectivity needs. The unit is powered by a 550 W AC power supply, ensuring reliable operation under various load conditions. Key hardware specifications of the EX4400-48T-AFI include support for up to 100GbE and 40GbE ports, with the capacity to expand up to three such ports with an additional module. This flexibility allows for high-speed connections essential for data-intensive applications. The switch is designed with a backplane capable of a 400 Gbps Virtual Chassis interconnect, enabling up to 10 units to be combined into a single logical device. This feature significantly enhances scalability and simplifies network management.
  • Packet Switching Capacities: 348 Gbps (unidirectional)/696 Gbps (bidirectional)
  • Throughput (Mpps): 517Mpps
  • Maximum MAC addresses per system: 112,000
Physically, the EX4400-48T-AFI measures 17.39 x 1.72 x 16.93 inches (44.17 x 4.37 x 43 cm) with the power supply and fans installed, occupying a 1U height in a rack setup. The system's weight, without the power supply or fan module, is 13.01 lb (5.9 kg), making it manageable for installation and maintenance. The unit includes two field-replaceable fans, each weighing 0.26 lb (0.12 kg), to maintain optimal operating temperatures and ensure durability. The switch's packet switching capabilities are robust, with a capacity of 348 Gbps unidirectional and 696 Gbps bidirectional, supporting a high throughput of 517 million packets per second (Mpps). It can handle up to 112,000 MAC addresses per system, accommodating large and dynamic networks. The support for jumbo frames up to 9216 Bytes is also notable, facilitating efficient data processing and transmission. Operating conditions for the EX4400-48T-AFI are designed to be flexible, with an operating temperature range from 32°F to 113°F and an operating altitude of up to 10,000 ft (3,049 m). The switch can withstand non-operating temperatures ranging from -40°F to 158°F and a non-operating altitude of up to 16,000 ft (4,877 m). Relative humidity tolerance in non-operating conditions ranges from 0% to 95% (noncondensing), ensuring the switch's resilience in various storage environments. In summary, the Juniper EX4400-48T-AFI switch is engineered to meet the needs of complex, high-demand network environments. It combines flexibility in connectivity options with high capacity and reliability, making it a suitable choice for organizations looking to scale their networks efficiently. Its design considerations for easy installation, maintenance, and operation further underscore its suitability for enterprise deployments.


Part Number and Manufacturer Juniper EX4400-48T-AFI
Ports Configuration 48 x 10/100/1000BASE-T Ethernet ports
High-Speed Ports 2 (expandable to 3 with additional module) for 100GbE/40GbE
AC Power Supply Capacity 550 W
Airflow Direction Back to Front (AFO)
Backplane Speed 400 Gbps with Virtual Chassis technology for scaling up to 10 interconnected units
Dimensions (W x H x D) 17.39 x 1.72 x 16.93 inches (44.17 x 4.37 x 43 cm)
Rack Units 1U
Weight of System 1.76 pounds (0.8 kg)
Replaceable Fans Quantity 2
Weight of Fan Module 0.26 pounds (0.12 kg)
Switching Capacity 348 Gbps (uni)/696 Gbps (bi)
Throughput 517 million packets per second (Mpps)
MAC Address Capacity 112,000 addresses
Support for Jumbo Frames Up to 9216 bytes
Minimum Operating Temperature 32° F
Maximum Operating Temperature 113° F
Minimum Storage Temperature -40° F
Maximum Storage Temperature 158° F
Max Operating Altitude Up to 10,000 feet (3,049 m)
Max Non-operating Altitude Up to 16,000 feet (4,877 m)
Non-operating Humidity Range 0% to 95% (non-condensing)
Weight of EX4400 Switch Without PS or Fans 13.01 pounds (5.9 kg)

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