Comprehensive Product Overview

The Juniper EX3400-48T is part of Juniper’s EX3400 Series of fixed-configuration access switches, engineered to balance enterprise-grade performance, scalability, and cost-efficiency for modern networks. As a non-PoE model, it’s optimized for high-density gigabit connectivity in spaces where power isn’t required for edge devices。

With Juniper Virtual Chassis Technology, the EX3400-48T allows up to 10 switches to be interconnected and managed as a single logical device, simplifying scaling and reducing operational overhead. It supports Juniper Mist Cloud Architecture with zero-touch provisioning (ZTP), enabling fast deployment and AI-powered automation for consistent service levels。

Designed for both enterprise campus wiring closets and data center access layers, the switch features front-to-back airflow, redundant hot-swappable fans, and support for redundant AC/DC power supplies for high reliability. Running on Junos OS, it delivers enterprise-grade Layer 3 routing, advanced QoS, MACsec encryption, and comprehensive security features to protect against network threats。

Key Features & Business Benefits

1. 48×Gigabit Ports + High-Speed Uplinks

• Ports: 48×10/100/1000BASE-T RJ45; 4×10G SFP+; 2×40G QSFP+
• Benefit: High-density gigabit connectivity for desktops, servers, and IoT devices; 10G/40G uplinks eliminate bandwidth bottlenecks for high-traffic networks。

2. High Performance & Scalability

• Capacity: 336 Gbps switching capacity; 250 Mpps wire-speed forwarding rate
• Virtual Chassis: Up to 10 switches in a single logical domain
• Benefit: Wire-speed performance for voice/video/data convergence; scalable “pay-as-you-grow” architecture supports growing device density。

3. Cloud-Ready & AI-Powered Management

• Mist Wired Assurance: AI-driven automation, ZTP, and real-time analytics
• Junos OS: Unified OS for consistent management across Juniper devices
• Benefit: Reduces deployment time from days to hours; minimizes manual configuration errors; lowers IT operational costs。

4. Enterprise-Grade Security & QoS

• Security: MACsec encryption, 802.1X, ACLs, 4096 VLANs
• QoS: 8 queues per port, strict priority scheduling, traffic shaping
• Benefit: Protects sensitive data and prevents unauthorized access; prioritizes critical traffic (VoIP, video) for consistent user experience。

5. Reliable & Energy-Efficient Design

• Redundancy: Hot-swappable fans; redundant AC/DC power supplies
• Efficiency: Energy-efficient ASIC; low-power modes
• Benefit: 99.999% uptime for mission-critical networks; reduces power consumption and cooling costs。

Technical Specifications

Ideal Application Scenarios

1. Enterprise Campus Wiring Closets: High-density gigabit connectivity for office desktops, printers, and non-PoE devices.
2. Data Center Access Layers: 10G/40G uplinks to aggregation/core switches; low-latency server/storage connectivity。
3. Education & Healthcare: Converged voice/video/data for classrooms, patient rooms, and administrative areas.
4. Retail & Hospitality: Secure guest/employee network segmentation; connectivity for POS terminals and digital signage.
5. Branch Offices: Compact 1U design for space-constrained environments; cloud management for remote IT teams。

Supported Accessories & Modules

• Transceivers (SFP+/QSFP+): 10GBASE-SR/LR/ER; 40GBASE-SR4/LR4; DAC cables。
• Power Supplies: JPSU-150-AC-AFO (included); JPSU-600-AC-AFO; JPSU-920-AC/DC-AFO。
• Fan Modules: Front-to-back (standard); back-to-front (optional)。
• Mounting Kits: 19” rack-mount brackets; wall-mount kit。
• Cables: Virtual Chassis stacking cables; console cables; power cords。

Frequently Asked Questions (FAQ)

Q1: What is the port configuration of the EX3400-48T?

A: It features 48×1G BASE-T RJ45 ports, 4×10G SFP+, and 2×40G QSFP+ uplinks for high-density connectivity and fast uplinks。

Q2: Does it support cloud management?

A: Yes, it is Juniper Mist Cloud-ready with zero-touch provisioning (ZTP), AI-powered automation, and real-time network analytics。

Q3: Can I stack multiple EX3400 switches?

A: Absolutely. Virtual Chassis Technology allows up to 10 EX3400 switches to be managed as a single logical device, simplifying scaling。

Q4: What operating system does it use?

A: It runs on Junos OS, Juniper’s unified operating system, providing consistent management, security, and performance across all Juniper network devices。

Q5: Is it suitable for data center environments?

A: Yes. It supports front-to-back/back-to-front airflow, redundant hot-swappable components, and 10G/40G uplinks, making it ideal for data center access layers.