How many devices can the PowerConnect 2748 support simultaneously?

The switch supports up to 16,384 MAC addresses in its address table, enabling connectivity to thousands of devices across multiple network segments. With 48 Gigabit ports plus 4 SFP slots, it can directly connect 52 network devices or serve as an aggregation point for multiple access switches in larger deployments.

Can this switch be used for long-distance network connections?

Yes. The four SFP combo ports support fiber transceivers (10GBase-X), enabling connections beyond the 100-meter limitation of standard Ethernet. This makes the PowerConnect 2748 ideal for campus networks, multi-building deployments, or connecting to remote data centers without requiring additional infrastructure.

What management capabilities does the web interface provide?

The web-based GUI enables VLAN configuration (up to 64 port-based VLANs), QoS priority assignment, port mirroring for security monitoring, IP address management via DHCP, and local password protection. Virtual Cable Diagnostics and fiber transceiver diagnostics support advanced troubleshooting and cable infrastructure validation.

Is this switch suitable for small office deployments?

Yes. The PowerConnect 2748 is designed for small-to-medium business environments and branch offices. Its 48 ports provide ample connectivity for workstations and network devices, while web management simplifies configuration without requiring dedicated IT staff or expensive management tools.

What power requirements does the PowerConnect 2748 have?

The switch features an internal power supply supporting dual-voltage AC input (120/230V), eliminating the need for external power conditioning or specialized electrical infrastructure. This flexibility enables deployment in diverse global locations with varying power standards.

How does the switch handle network congestion and broadcast storms?

The PowerConnect 2748 includes broadcast storm control to prevent network traffic storms and Head of Line (HOL) blocking prevention to ensure fair bandwidth distribution. QoS prioritization allows administrators to allocate bandwidth to critical applications, maintaining network stability during peak usage.

What is the forwarding performance of this switch?

The PowerConnect 2748 delivers 71.4 Mpps (million packets per second) forwarding rate with 144 Gbps switching capacity, enabling wire-speed performance at all three Ethernet speeds (10/100/1000 Mbps). This ensures minimal latency and maximum throughput across all ports simultaneously.

2J977 - Dell 2J977 PowerConnect 2748 48x 1GbE Layer 3 Switch

Name: Dell 2J977 PowerConnect 2748 48x 1GbE Layer 3 Switch
Brand: Dell
SKU: 2J977

2J977 - Dell 2J977 PowerConnect 2748 48x 1GbE Layer 3 Switch | US IT Hardware

Product overview

The Dell PowerConnect 2748 is a Layer 3 managed Gigabit Ethernet switch designed for enterprise branch offices and medium-sized business deployments. It provides 48 fixed 10/100/1000Base-T ports plus 4 SFP combo slots for fiber connectivity, delivering 144 Gbps switching capacity and 71.4 Mpps forwarding performance. Web-based management enables configuration of VLANs, Quality of Service (QoS) priorities, port mirroring, and IP routing. The switch supports auto-negotiation, broadcast storm control, and Virtual Cable Diagnostics for troubleshooting. Housed in a compact 1U rack-mountable chassis (17.3" × 10" × 1.7"), it operates across 32–113°F with dual AC 120/230V power input. The 16K MAC address table and Layer 3 capabilities make it suitable for segmented networks requiring managed traffic control and remote office connectivity beyond standard Ethernet distance limitations.

48x Gigabit + 4x SFP combo ports, 144 Gbps capacity
Layer 3 managed with VLAN, QoS, and port mirroring
1U rack-mountable, 32–113°F operating range
71.4 Mpps forwarding, 16K MAC address table
Web-based management, auto-negotiation, DHCP support
Virtual Cable Diagnostics, broadcast storm control

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	2J977
Brand	Dell
Condition	New
Model	PowerConnect 2748
Manageable	Yes; Web-managed
Product Line	PowerConnect
Product Type	Layer 3 Managed Gigabit Ethernet Network Switch
Media Standard	Twisted Pair; Optical Fiber
System Capacity	144 Gbps switching capacity
Ethernet Standard	Gigabit Ethernet; 10 Gigabit Ethernet support via SFP
Technology Standard	10/100/1000Base-T; 10GBase-X

Compatible systems

No specific compatibility lists found in sources

Best for

Branch Office Connectivity
Deploy across 48 ports for workstation and server connectivity in remote offices. Web-managed interface simplifies configuration without on-site IT staff; SFP combo ports enable long-distance uplinks beyond 100m Ethernet limitations.
Data Center Aggregation
Use Layer 3 routing and 144 Gbps switching capacity to aggregate traffic from multiple network segments. VLAN support and QoS prioritization ensure critical applications receive bandwidth precedence in high-density environments.
Campus Network Segmentation
Implement VLAN-based network segmentation across departments with 16K MAC address table capacity. Port mirroring and Virtual Cable Diagnostics support intrusion detection and infrastructure troubleshooting across distributed locations.
Small-to-Medium Business LAN
Provide Gigabit connectivity to 48 workstations and network devices with managed traffic control. Auto-negotiation and broadcast storm control minimize configuration overhead while maintaining network stability.

Frequently asked questions

Details

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Forwarding Performance	71.4 Mpps

MAC Address Table Size	16K entries

Supported Layer Standard	Layer 3

Nominal Voltage	AC 120/230 V
Power Supply Type	Internal power supply

Depth	10.0 in
Width	17.3 in
Height	1.7 in
Weight	8.6 lbs; 15.00 LBS (alternate listing)
Rack Units	1U
Form Factor	Rack-mountable

Operating Temperature	32° to 113° F
Safe Humidity Range While Operating	10 - 90% (non-condensing)

Interface/Ports

Network Ports	48x 10/100/1000Base-T RJ-45; 4x SFP
Expansion Slots Details	SFP (Small Form-factor Pluggable)
Quantity of Expansion Slots	4 SFP slots
Quantity of Fixed Ports/Expansion Slots	52 total ports

Dell 2J977 PowerConnect 2748 48x 1GbE Layer 3 Switch