En Juniper EX3400-48T-DC Ethernet Switch is a robust access layer switch engineered for enterprise and industrial environments that require dependable 48-port Gigabit connectivity with direct DC power support. Built on the proven EX3400 platform, this DC-powered variant combines scalable Layer 2 and Layer 3 switching with advanced network management and security, making it especially well-suited for installations where AC power isn’t ideal or where DC power distribution is standard practice — such as telecommunications facilities, edge sites, utility networks, and distribution hubs.
With support for Juniper’s Virtual Chassis technology, the EX3400-48T-DC can interoperate with other EX Series switches to form a unified logical system, reducing management overhead while increasing resilience and scalability. Running on the industry-tested Junos Operating System, it delivers predictable performance, rich feature sets, and comprehensive monitoring and automation capabilities.
The EX3400-48T-DC offers a compelling combination of high port density, DC power compatibility, and enterprise-grade networking features, making it an ideal choice for organisations that need reliable, DC-fed access switching with the flexibility to grow and adapt to evolving network demands.
48 × Gigabit Ethernet Access Ports
Provides high-density 10/100/1000Base-T connectivity for enterprise, campus, and telecom access networks.
DC Power Input
Designed for environments with -48V DC power, making it ideal for telecom facilities, data centres, utilities, and edge locations where DC power is standard.
Virtual Chassis Technology
Supports interconnection of up to 10 EX Series switches into a single logical device, simplifying management while improving scalability and resiliency.
Enterprise Layer 2 and Layer 3 Switching
Delivers wire-speed switching with advanced VLANs, routing, and traffic management capabilities suitable for mission-critical access deployments.
Junos Operating System
Runs Juniper’s stable and widely adopted OS, providing consistent configuration, automation support, and operational reliability across Juniper switching and routing platforms from Juniper Networks.
High-Speed Uplink Options
Supports flexible uplinks for aggregation and core connectivity, including 10GbE and 40GbE options (model-dependent).
Security and Network Control
Includes robust access control, segmentation, and monitoring features to help protect the network edge and enforce policy compliance.
Compact 1U Form Factor
Space-efficient rack-mount design suited to dense installations and constrained environments.
Designed for Long-Term Operation
Proven hardware platform widely deployed in enterprise and telecom networks, now commonly used as a reliable legacy access switch with strong secondary-market and spares availability.
General & Form Factor
• Form factor: Fixed, 1 Rack Unit (1U) access switch.
• DC Power: Designed with a built-in DC power supply for -48 V DC environments (telecom, utility, edge).
• Dimensions: Approx. 17.4 × 1.7 × 13.8 in (43.7 × 4.4 × 35 cm), standard 1U rack mount.
Performance & Capacity
• Backplane Speed: 160 Gbps shared across the chassis.
• Throughput: ~250 million packets per second (wire-speed).
Port Density & Types
• Access Ports: 48× 10/100/1000 Base-T RJ-45.
• Uplink/Stacking Options:
– 4× dual-mode GbE/10 GbE SFP/SFP+ ports.
– 2× 40 GbE QSFP+ (model dependent on configuration).
Layer & Routing Features
• Layer 2 & Layer 3: Supports comprehensive VLAN, switching, and routing features with optional licenses.
• Virtual Chassis: Up to 10 EX3400 units can be linked and managed as one logical switch.
Scalability & Flexibility
• MAC Address Table: ~32,000 entries.
• Jumbo Frames: Up to ~9216 bytes.
• Route Capacity: IPv4 unicast/multicast routes supported per chassis (platform typical).
Resiliency & Redundancy
• Power: DC power support for environments with -48 V DC distribution.
• Cooling: Redundant fan modules with front-to-back airflow.
• Field Replaceable: Fans and modules can be serviced in the field.
Management & Protocol Support
• Operating System: Junos OS with unified feature set across switching and routing platforms.
• Security & Control: Supports network segmentation, ACLs, and advanced traffic monitoring (sFlow, QoS queues).
Environmental & Physical
• Rack Mount: Standard 19-inch rack mountable in enterprise or telco racks.
• Robust Design: Suitable for demanding access deployments requiring DC infrastructure support.
| Period | Owner / Marketer | Notes |
|---|---|---|
| 1996 – Present | Juniper Networks | Founded in 1996, Juniper Networks has been independently developing high-performance networking hardware and software. It entered the Ethernet switching market in 2008 with the EX Series, beginning with the EX4200 as its first enterprise switch product. JUNOS, Juniper’s unified operating system, underpins its routing and switching platforms. (Wikipedia) |
| Circa 2010s – Present | Juniper Networks | Through the 2010s, Juniper expanded the EX Series with models like the EX2300, EX3300, EX3400, and EX4300, offering scalable campus and branch access switching with Virtual Chassis and advanced Layer2/Layer3 features. The EX3400 family, including the DC-powered EX3400-48T-DC variant, became part of this portfolio for enterprise and telco DC-powered deployments. (Wikipedia) |
| 2024 – Present | Juniper Networks (pending acquisition) | In 2024 Juniper agreed to be acquired by Hewlett Packard Enterprise (HPE) in a planned $14 billion deal. Regulatory processes have been ongoing through 2025, with potential future integration of Juniper technologies into the broader HPE networking portfolio if the acquisition completes. (reuters.com) |
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