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by Juniper
Product Line: Juniper EX4300 Series
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Product Description

The EX4300-48T-TAA is a Trade Agreement Act-compliant switch featuring 48 10/100/1000BASE-T ports and supports up to four 40GbE ports with an additional module. It offers a 350 W AC power supply, front-to-back airflow, and a 320 Gbps Virtual Chassis interconnect capability, enabling up to 10 units to function as a single logical device. With dimensions of 17.36 x 1.72 x 16.38 in for the base unit, this switch delivers a packet switching capacity of 248 Gbps (unidirectional) and 496 Gbps (bidirectional), supporting a throughput of 369 Mpps at wire speed.

FAQs for the EX4300-48T-TAA

  • What is the port configuration of the EX4300 48-port switch?
    The EX4300 48-port switch features 48 10/100/1000BASE-T ports and up to four 40GbE ports.
  • How does the QSFP+ DAC contribute to the EX4300's functionality?
    The QSFP+ Direct Attach Copper (DAC) cable facilitates Virtual Chassis interconnections, allowing up to 10 units to combine as a single logical device with a backplane speed of 320 Gbps.
  • What are the power specifications of the EX4300, 48-port model?
    The power supply rating for this model is 350 W AC, with airflow designed as AFO (Airflow from Front to Back).
  • Can you expand on the Virtual Chassis capability of the EX4300?
    The EX4300 supports a Virtual Chassis configuration, enabling a backplane interconnect speed of 320 Gbps to link up to 10 switches into a unified, high-performance device.
  • What are the dimensions and weight of the EX4300 48-port switch?
    Without add-ons, the base unit measures 17.36 x 1.72 x 16.38 inches and weighs 2.4 lb. With the power supply, dimensions extend to 17.36 x 1.72 x 17.51 inches, and further to 17.36 x 1.72 x 18 inches with the power supply and front module installed.
  • Describe the airflow and cooling features of the EX4300.
    The EX4300 features AFO (Airflow from Front to Back) with two field-replaceable fan modules, ensuring efficient cooling. Each PSU supports airflow of 7.5 cubic feet per minute.
  • What is the packet switching capacity and throughput of the EX4300?
    The EX4300 offers a packet switching capacity of 248 Gbps unidirectional/496 Gbps bidirectional, with a throughput of 369 Mpps (wire-speed).
  • How does the operating temperature range of the EX4300 impact its deployment?
    The EX4300 can operate between 32°F and 113°F, allowing for deployment in a wide range of environments without compromising performance.
  • What are the storage temperature and altitude specifications for the EX4300?
    The storage temperature range is from -40°F to 158°F. It can operate up to 10,000 ft and be stored up to 16,000 ft, with a non-operating relative humidity of 0% to 95% (non-condensing).
  • How does the GbE Port Density affect the network scalability of the EX4300?
    With a total GbE Port Density of 56 ports (48 host ports plus four 40GbE ports and an optional four-port 1/10GbE uplink module), the EX4300 supports scalable network expansion to meet growing demand.

Product Review

The Juniper EX4300-48T-TAA offers a solid 48-port 10/100/1000BASE-T configuration with the flexibility to expand up to four 40GbE ports, catering to diverse networking demands. Its 320 Gbps Virtual Chassis interconnect capability allows for scaling by combining up to 10 units, enhancing network capacity and simplification. However, the system's power consumption and cooling requirements, with a 350 W AC power supply and specified airflow for optimal operation, may pose challenges for environments with limited space or power efficiency concerns.


The Juniper EX4300-48T-TAA is a Trade Agreement Act-compliant switch designed to meet the demands of today's most challenging enterprise networking environments. It features 48 10/100/1000BASE-T ports, providing a solid foundation for high-speed connectivity and network efficiency. This switch is equipped with a 350W AC power supply, ensuring reliable operation under various load conditions. One of the standout features of the EX4300-48T-TAA is its ability to support up to four 40GbE ports through an optional module. This capability allows for high-speed interconnects and efficient network scaling, making it an excellent choice for businesses looking to future-proof their network infrastructure. The switch boasts a 320 Gbps Virtual Chassis interconnect, enabling up to 10 units to be combined into a single logical device. This feature simplifies network management and increases operational efficiency by providing a unified platform for traffic management and policy implementation. In terms of physical dimensions, the base unit measures 17.36 x 1.72 x 16.38 inches, which can extend to 17.36 x 1.72 x 18 inches with the power supply and front module installed. Despite its robust capabilities, the system maintains a modest weight of 2.4 lb, with an additional 0.33 lb for the fan module. The EX4300-48T-TAA is designed with efficiency in mind, featuring two field-replaceable fans and a power supply unit airflow rated at 7.5 cubic feet per minute. This front-to-back airflow design ensures optimal cooling for critical components, even under heavy load. Key specifications include: - Packet Switching Capacities: 248 Gbps (unidirectional) / 496 Gbps (bidirectional) - GbE Port Density per System: 56 (48 host ports + four 40GbE ports + optional four-port 1/10GbE uplink module) - Throughput (Mpps): 369 Mpps (wire-speed) Furthermore, the switch operates within a temperature range of 32°F to 113°F, with a storage temperature tolerance between -40°F and 158°F. It can function at altitudes up to 10,000 ft when operating and 16,000 ft when non-operating, with a relative humidity range for non-operating conditions from 0% to 95% (non-condensing). In summary, the Juniper EX4300-48T-TAA is a high-performance, scalable network switch designed to accommodate the growing needs of modern enterprises. Its robust virtual chassis technology, combined with high-density port configuration and energy-efficient design, makes it an ideal solution for organizations looking to optimize their network infrastructure for reliability and performance.


Part NumberEX4300-48T-TAA
ComplianceComplies with Trade Agreement Act
Configuration48 x 10/100/1000BASE-T ports
Extended PortsUp to 4 x 40GbE with additional module
Power Supply Capacity350 W AC
Cooling DirectionAir flows from front to back
Interconnect Capacity320 Gbps Virtual Chassis for up to 10 linked devices
Dimensions without accessories17.36 x 1.72 x 16.38 inches (44.1 x 4.37 x 41.6 cm)
Dimensions with power supply17.36 x 1.72 x 17.51 inches (44.1 x 4.37 x 44.47 cm)
Full Dimensions17.36 x 1.72 x 18 inches (44.1 x 4.37 x 45.73 cm)
Main Unit Weight2.4 pounds (1.1 kg)
Fan Module Weight0.33 pounds (0.15 kg)
Replaceable Fan Units2
Power Supply Airflow7.5 cubic feet per minute
Switching Capacity248 Gbps one way/496 Gbps both ways
Port Count56 (48 base + 4 x 40GbE + 4 x 1/10GbE optional)
Data Throughput369 million packets per second (wire-speed)
Minimum Operating Temperature32°F
Maximum Operating Temperature113°F
Minimum Storage Temperature-40°F
Maximum Storage Temperature158°F
Operational Altitude LimitUp to 10,000 feet (3,049 m)
Non-operational Altitude LimitUp to 16,000 feet (4,877 m)
Humidity Range (Non-operating)0% to 95%, non-condensing

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