EX4400-EM-4S – Juniper 4-Port 10GbE SFP+ Expansion Module

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The Juniper EX4400-EM-4S is a high-performance uplink expansion module designed specifically for the Juniper EX4400 Series Ethernet Switches. It adds four 10 Gigabit SFP+ interfaces, enabling organizations to expand network capacity for high-speed uplinks, switch aggregation, server connectivity, and campus backbone deployments. 

Designed for enterprise campus, branch, and data center access networks, the EX4400-EM-4S integrates seamlessly with supported EX4400 platforms while maintaining the reliability and operational simplicity of the Juniper EX Series. The module supports Junos OS and integrates with Juniper Mist™ cloud management, making it an excellent choice for scalable, AI-driven network infrastructures. 

Key Features – EX4400-EM-4S

• Processor: Not Applicable 
• Memory: Not Applicable 
• Storage: Not Applicable 
• Controller: Integrated EX4400 Uplink Expansion Module 
• Networking / Ports: 
  • 4 × 10GbE SFP+ ports 
• Power & Cooling: 
  • Powered directly by the host EX4400 switch
  • No separate power supply required
• Management: 
  • Managed through Junos OS
  • Compatible with Juniper Mist Wired Assurance 
• Security: 
  • Inherits security features from the host EX4400 switch
• Form Factor: 
  • EX4400 Expansion Module

Technical Specifications 

• Processor Type: Not Applicable 
• Chipset / Platform: Juniper EX4400 Platform 
• Memory Technology: Not Applicable 
• Storage Interface: Not Applicable 
• RAID Support: Not Applicable 
• Networking: 
  • 4 × 10 Gigabit Ethernet SFP+ interfaces
• I/O Ports: 
  • 4 × SFP+ cages
    
• Operating System Compatibility: 
  • Supported on Junos OS for EX4400 Series
• Supported Platforms: 
  • Juniper EX4400 Series Ethernet Switches 

Physical Specifications

• Form Factor: 
  • EX4400 Uplink Expansion Module 
• Weight: 
  • 0.09 kg
  • 0.20 lbs 
• Dimensions: 
  • Juniper does not publish standalone physical dimensions for the EX4400-EM-4S module in its official hardware specifications. 
  • mm: Not officially specified 
  • inches: Not officially specified
• Rack Compatibility: 
  • Compatible with Juniper EX4400 Series 1U Ethernet Switches via the integrated expansion slot.

Ideal For

• Enterprise campus access networks 
• High-speed fiber uplinks 
• Distribution layer connectivity 
• Server aggregation 
• Branch office network expansion 
• Juniper Mist-managed enterprise deployments 
• Data center edge connectivity 

Warranty & Support

• Standard Juniper Networks Limited Hardware Warranty 
• Eligible for Juniper Care support services 
• Fully supported under Juniper EX4400 hardware maintenance programs and software support contracts. 

FAQs – EX4400-EM-4S

1. Which switches support the EX4400-EM-4S?
The module is designed for compatible Juniper EX4400 Series Ethernet Switches.

2. How many uplink ports does the module provide?
It adds four 10GbE SFP+ interfaces for fiber uplink or aggregation connectivity.

3. Does the module require its own power supply?
No. It is powered through the host EX4400 switch chassis.

4. Can the module be managed through Juniper Mist?
Yes. Management is performed through the host EX4400 switch using Junos OS and can be integrated with Juniper Mist Wired Assurance.

5. Does the module support optical and DAC connections?
Yes. It accepts compatible Juniper SFP+ optical transceivers and Direct Attach Copper (DAC) cables supported for the EX4400 platform.

6. Is the EX4400-EM-4S hot-swappable?
Installation and replacement procedures should follow Juniper's hardware maintenance guidelines for the EX4400 platform to ensure proper operation.