4D9RN Dell 48 Ports Managed Rack-Mountable POE+ 1Gbe Networking Switch

Overview of DELL 4D9RN Networking Rack-Mountable Switch

The DELL 4D9RN S3148P is a high-performance, enterprise-grade managed network switch engineered for scalable campus, branch, and data center edge deployments. Designed with advanced Layer 3 capabilities, Power over Ethernet Plus (PoE+), and stackable architecture, this rack-mountable switch delivers reliability, flexibility, and optimized traffic handling for modern networks.

General Information

• Manufacturer: Dell 
• Part Number: 4D9RN 
• Product Type: Networking Switch

Technical Specifications

• Device Type : Switch - 48 Ports - L3 - Managed
• Ports : 48 Ports
• Stackable design for simplified scalability
• Front-to-back airflow for efficient cooling
• 48 x 10/100/1000 Mbps RJ-45 PoE+ Ethernet ports
• 2 x 10 Gigabit SFP+ uplink ports 
• 2 x Combo Gigabit Ethernet ports (RJ-45 or SFP)

Power over Ethernet Plus Capabilities

• PoE+ compliant Ethernet ports
• Per-port power budget up to 30.8 watts
• Ideal for VoIP, surveillance cameras, and wireless access points

Expansion, Interfaces, and Management Ports

Connectivity Interfaces

• 48 x Gigabit Ethernet RJ-45 PoE+ ports
• 2 x 10GbE SFP+ ports
• 2 x Combo Gigabit Ethernet ports (RJ-45/SFP)
• 1 x USB Type-A port

The Dell 4D9RN 48 Ports Rack-Mountable Networking Switch

The Dell 4D9RN category represents a class of enterprise-grade, rack-mountable managed Ethernet switches engineered to deliver reliable Layer 2 and advanced Layer 3-ready capabilities for modern network infrastructures. This category focuses on high-density 1GbE connectivity combined with integrated Power over Ethernet Plus (PoE+) functionality, enabling organizations to power and connect a wide range of network devices from a single centralized platform. Designed for scalability, operational efficiency, and long-term performance, these switches are widely adopted across enterprise campuses, data centers, branch offices, and service provider edge environments.

48-Port Gigabit Ethernet

A defining characteristic of this switch category is its 48-port Gigabit Ethernet configuration. Each RJ45 port supports 10/100/1000 Mbps speeds, allowing seamless integration with legacy Fast Ethernet devices while fully supporting modern Gigabit workloads. This port density makes the Dell 4D9RN category ideal for environments requiring high endpoint aggregation, such as office floors, classrooms, healthcare facilities, and distributed enterprise networks.

Integrated Power over Ethernet Plus (PoE+) Capabilities

The Dell 4D9RN switch category is purpose-built to support PoE+ (IEEE 802.3at), delivering both data and electrical power over standard Ethernet cabling. This capability is essential for powering modern network endpoints such as IP phones, wireless access points, IP cameras, access control systems, and IoT devices.

Advanced Managed Switching Features

As a fully managed networking switch category, Dell 4D9RN devices provide granular control over traffic, security, and performance. Comprehensive management features empower IT teams to design, monitor, and optimize network operations according to organizational policies and performance goals.

Rack-Mountable Design and Included Rail Kit

Designed for standard 19-inch racks, the Dell 4D9RN switch category features a compact, rack-mountable form factor optimized for enterprise wiring closets and data centers. The inclusion of a rail kit simplifies installation and ensures secure mounting.

Dual Cooling Fan System for Thermal Reliability

Thermal management is critical for continuous network operation. The Dell 4D9RN category incorporates a dual cooling fan system to maintain optimal operating temperatures under sustained workloads.

Comprehensive Management Interfaces

Multiple management interfaces are provided to accommodate diverse operational preferences and deployment scenarios. The inclusion of a serial management cable enables out-of-band management for initial setup and troubleshooting.

Energy Efficiency and Sustainable Operation

Energy-efficient design principles are embedded throughout this switch category. Intelligent power management reduces operational costs while supporting sustainability initiatives.

Efficient Ethernet Standards

Compliance with energy-efficient Ethernet standards reduces power consumption during periods of low network activity without impacting performance.