Ubiquiti USW-48-PoE switch 

General Overview

• Model: Ubiquiti UniFi Switch USW-48-PoE
• Description: A robust 48-port Layer 2 PoE switch with silent, fanless operation, providing exceptional switching capacity and non-blocking throughput for small to medium-sized networks.

Port Configuration

• Total Ports: 48 GbE RJ45 ports
  • PoE Ports: 32 PoE+ (802.3af/at) capable ports
  • Non-PoE Ports: 16 standard GbE ports
• SFP Ports: 4 x 1G SFP for uplinks or fiber connections

Power Specifications

• Total PoE Power Budget: 195W
• Max PoE Wattage per Port:
  • PoE+: 32W per port (802.3at)
  • PoE: 15.4W per port (802.3af)
• PoE Voltage Range:
  • PoE: 44–57V
  • PoE+: 50–57V
• Power Supply: Internal AC/DC, 240W
• Power Consumption:
  • 45W (excluding PoE output)

Performance

• Non-Blocking Throughput: 52 Gbps
• Switching Capacity: 104 Gbps
• Forwarding Rate: 77.38 Mpps

Hardware and Build

• Cooling System: Fanless, silent operation for noise-sensitive environments
• Dimensions:
  • 442 x 285 x 44 mm (17.4 x 11.2 x 1.7″)
• Weight:
  • Without brackets: 4.5 kg (10 lb)
  • With brackets: 4.6 kg (10.2 lb)
• Enclosure Material: SGCC steel
• Shock/Vibration Protection: Complies with ETSI300-019-1.4

Environmental

• Operating Temperature: -5°C to 40°C (23°F to 104°F)
• Operating Humidity: 10% to 90% (non-condensing)

Networking Features

Layer 2:

• Traffic Management:
  • IGMP snooping
  • Storm control
  • Egress rate limiting
  • Multicast/broadcast rate limiting
• VLAN Support:
  • Voice VLAN
  • Port isolation
  • Proprietary loop protection
• Security:
  • MAC address blocking
  • DHCP snooping/guarding
  • Device isolation with ACLs
  • 802.1X access control
  • Port-level MAC restrictions
• Redundancy & Aggregation:
  • STP / RSTP with priorities
  • LACP port aggregation
• Monitoring & Diagnostics:
  • Port mirroring
  • LLDP-MED
• Performance Enhancements:
  • Jumbo frames
  • Flow control

Layer 3: Not supported

LED Indicators

• System Status: Overall health and status
• Ethernet Ports: PoE, speed, link, and activity
• SFP Ports: Link and activity

Certifications

• CE, FCC, IC

This switch is ideal for setups requiring moderate PoE power distribution and silent operation, such as office networks, guest houses (like yours), or other environments with audio or video equipment sensitive to noise.

FAQs for the Ubiquiti USW-48-PoE switch

General Questions

1. What is the Ubiquiti USW-48-PoE switch used for?
The USW-48-PoE is a Layer 2 managed switch designed to provide Power over Ethernet (PoE) and high-speed networking for devices like wireless access points, IP cameras, VoIP phones, and other Ethernet-enabled devices. It is ideal for small to medium-sized business networks.

2. How many PoE devices can this switch support?
The switch has 32 PoE+ ports, which can power up to 32 PoE-enabled devices simultaneously, as long as the total power draw doesn’t exceed the 195W PoE budget.

3. Does it support Layer 3 routing?
No, the USW-48-PoE is a Layer 2 switch and does not support Layer 3 routing. It is designed for switching, VLANs, and traffic management within a local network.

Power and PoE

4. What is the maximum power output per PoE port?

• PoE (802.3af): Up to 15.4W per port
• PoE+ (802.3at): Up to 32W per port

5. Can the switch power devices like UniFi Access Points or IP cameras?
Yes, the switch supports both PoE (802.3af) and PoE+ (802.3at), making it compatible with most UniFi access points, IP cameras, and similar devices.

6. What happens if the PoE budget (195W) is exceeded?
The switch dynamically prioritizes power delivery based on port configuration and connected devices. If the power draw exceeds the budget, lower-priority devices may lose power.

Network and Performance

7. What is the total switching capacity of the USW-48-PoE?
The switch offers a 104 Gbps switching capacity, ensuring efficient data transfer across all ports.

8. What is the non-blocking throughput?
The USW-48-PoE has a 52 Gbps non-blocking throughput, allowing all ports to operate at full capacity without bottlenecks.

9. What is the difference between the PoE+ ports and the non-PoE ports?

• The 32 PoE+ ports can provide power and data to connected devices.
• The 16 non-PoE ports only handle data transfer for devices that don’t require PoE.

Installation and Design

10. Does the USW-48-PoE have fans?
No, it features a fanless, silent cooling design, making it suitable for noise-sensitive environments like offices, guest houses, and libraries.

11. Can it be rack-mounted?
Yes, the switch is rack-mountable and fits into a standard 1U rack space. Mounting brackets are included.

12. What are the physical dimensions and weight?

• Dimensions: 442 x 285 x 44 mm (17.4 x 11.2 x 1.7″)
• Weight:
  • Without brackets: 4.5 kg (10 lb)
  • With brackets: 4.6 kg (10.2 lb)

Connectivity

13. What are the SFP ports used for?
The 4 x 1G SFP ports are designed for fiber uplinks or long-distance connections to other switches or devices.

14. Is this switch compatible with UniFi Network applications?
Yes, the USW-48-PoE is fully integrated into the UniFi Network Controller, allowing centralized management, configuration, and monitoring.

Environmental and Certifications

15. Can the switch be used outdoors?
No, the USW-48-PoE is designed for indoor use only, with an operating temperature range of -5°C to 40°C (23°F to 104°F) and humidity tolerance of 10–90% non-condensing.

16. Is the USW-48-PoE certified for safety and compliance?
Yes, it is certified with CE, FCC, and IC standards, ensuring safety and regulatory compliance.