Please allow ~2-3 weeks to dispatch for quality control. Product images are for illustrative purposes only and may contain AI-generated content; they may not represent the final product you receive. Products are subject to the cosmetic grading policy detailed here.
If you are ordering a device that does not include a Windows 11 licence as standard, please check Microsoft's minimum system requirements to confirm if it can be upgraded later should you wish to do so.
Cisco SG300-28MP Certified Refurbished 28-Port Gigabit PoE+ Managed Switch
The Cisco SG300-28MP features 28 Gigabit Ethernet ports (24 PoE+ ports plus 2 combo Gigabit SFP ports), 128 MB RAM, 16 MB flash memory, 56 Gbps switching capacity, 375W total PoE+ budget, and a 1U rack-mountable metal chassis measuring 439.4 x 256.5 x 43.9 mm and weighing 5.26 kg. This certified refurbished enterprise-grade managed switch delivers reliable Layer 2/3 networking capabilities ideal for small business applications requiring Power over Ethernet devices such as IP phones, wireless access points, and security cameras.
Professional Applications
The SG300-28MP excels in small business environments where Power over Ethernet is essential. With 375W of total PoE+ budget distributed across 24 ports, this switch can power multiple IP phones, wireless access points, and IP surveillance cameras simultaneously without requiring separate power supplies. The 56 Gbps non-blocking switching capacity and 41.67 Mpps forwarding performance ensure smooth data transmission for voice, video, and data applications. Advanced Layer 2/3 features including VLAN support (up to 4000 active VLANs), static IPv4 routing with 512 routes, and comprehensive Quality of Service make this switch suitable for segmented networks requiring traffic prioritisation.
Key Features and Benefits
- Enterprise-Grade Performance: 56 Gbps wire-speed switching capacity with 41.67 Mpps packet forwarding delivers consistent network performance under heavy loads
- Comprehensive PoE+ Support: 375W total PoE budget powers up to 24 devices at 30W per port (IEEE 802.3at PoE+) or 15.4W per port (IEEE 802.3af PoE)
- Advanced Management Options: Web-based GUI, CLI, SNMP v1/v2c/v3, and Textview CLI provide flexible configuration and monitoring capabilities
- Enhanced Security: IEEE 802.1X authentication, RADIUS, TACACS+, DHCP snooping, Dynamic ARP Inspection, and up to 512 ACL rules protect your network
- IPv6 Ready: USGv6 and IPv6 Gold Logo certified with full dual-stack IPv4/IPv6 support and First Hop Security features
- Energy Efficient Design: Energy Detect, Short Reach mode, and IEEE 802.3az Energy Efficient Ethernet support reduce operational costs
Technical Specifications
- Switching Capacity: 56 Gbps non-blocking wire-speed architecture
- MAC Address Table: 16,000 entries
- VLAN Support: Up to 4000 active VLANs simultaneously
- Jumbo Frame Support: Up to 9 KB (9216 bytes)
- Power Consumption: 43.1W (without PoE at 220V), 436W maximum with full PoE load
- Operating Temperature: 0°C to 40°C
- MTBF: 138,676 hours at 50°C
- Dimensions: 439.4 x 256.5 x 43.9 mm (1U rack-mountable)
- Weight: 5.26 kg
- Included Accessories: Serial cable and rack mounting brackets
Cosmetic Grading Standards
For networking equipment like the SG300-28MP, cosmetic grading reflects only external appearance whilst performance remains identical across all grades. Excellent Grade units show minimal signs of previous use with only minor scuffing or abrasions, no deep scratches, cracks, paint chips, or broken/missing pieces. Good Grade units are fully tested and functional but may feature light scratches on external housing, more excessive case wear, small dings or dents, or small paint chips. Both grades deliver the same reliable network performance and undergo identical testing protocols.
Verified Reboot Refurb Quality Assurance
Every Cisco SG300-28MP undergoes Reboot IT's comprehensive Verified Reboot Refurb certification process, where all features and functions are meticulously tested using cutting-edge diagnostic software. Since 2001, Reboot IT has been an expert in the refurbished IT industry, establishing rigorous testing protocols that verify full functionality before resale. Each switch is subjected to visual inspection, connectivity testing across all 28 ports, PoE output verification, management interface validation, and burn-in testing to identify potential issues under sustained workloads. Any faulty components are replaced exclusively with original parts to guarantee reliable, long-lasting performance.
Warranty and Support
This certified refurbished Cisco SG300-28MP is sold by Reboot IT with a comprehensive 1-year warranty covering all hardware faults. The warranty ensures peace of mind for your networking investment, with support available for any technical issues that arise during normal operation. Reboot IT stands behind the quality of all Verified Reboot Refurb products, offering warranty coverage that reflects confidence in the thorough refurbishment and testing process.
Ready to upgrade your network infrastructure? Invest in this certified refurbished Cisco SG300-28MP and experience enterprise-grade performance at a fraction of the cost of new equipment whilst supporting sustainable technology reuse.
| Manufacturer Warranty | 3 Months |
| Item Height | 44 mm |
| Network Connectivity | Wired-Ethernet (RJ-45) |
| Item Width | 230 mm |
| Ethernet Technology | Gigabit Ethernet (1000-Mbit/s) |
| Model | SG300-28PP-K9 V02 |
| Layer | None |
| Type | Managed Network Switch |
| Network Management Type | Fully Managed |
| Processor Model | none |
| Number Of Wan Ports | None |
| Connector Type | None |
| Raid Levels | None |
| Brand | Cisco |
| Form Factor | Rack Mountable |
| Number Of Lan Ports | 28|4 SFP|2 Combo |
| Maximum Lan Data Rate | 1000 Mbps/1 Gbps |
| Maximum Data Transfer Rate | 1 Gbps |
| Custom Bundle | No |
| Network Type | ATA over Ethernet |
| Supported Wireless Protocols | None |
| Device Connectivity | None |
| Interface | Ethernet (RJ-45) |
| Item Length | 440 mm |
Refurbished Computers - Cosmetic Grading Guide
Our supplier's refurbished hardware is typically graded either "Excellent" or "Good", however, some legacy products were graded under a letter grading system (A, B, C). Please find the definitions for each grade below and contact us if you're uncertain of a device's grade.
Used Smartphone / Refurbished Mobile Phones
"Excellent" Grade
Devices in this category appear like new, with very minor wear. Expect light or fine scratches on the screen that are shallow enough not to catch on a fingernail. The edge around the glass is virtually flawless, save for possible light scratching around the power port. The back plate may show light/fine scratches, including on the Apple logo, with any discoloration being minimal.
"Good" Grade
These devices are characterized by being fully tested and functional even if they have body scratches, minor paint chips, or a small hairline crack on the screen. Screens are free from dead pixels but may exhibit slight scratching from moderate use.
Refurbished Desktops, Laptops and Monitors
"Excellent" Grade - Laptops
Reserved for units that show barely any signs of previous use, these laptops may exhibit very minor scuffing or abrasions, associated only with minimal standard use. The keyboards show light wear, and importantly, the screens are pristine, free from any scratches, cracks, chips, dead pixels, dark spots, discoloration, or blemishes.
"Excellent" Grade - Desktops
Desktop PCs in the "Excellent" grade category are free from deep scratches, cracks, paint chips, or any broken/missing pieces, ensuring a sleek and almost-new aesthetic.
"Excellent" Grade - Monitors
"Excellent" grade is reserved for units that show evidence of very little to no previous use. Any wear on an "Excellent" Display, including housing/frame and/or external surfaces (i.e. Frame) is associated with standard minimal use. "Excellent" units may have minor scuffing and / or minor abrasions on plastics with from standard light previous use."Excellent" Displays will feature no scratches, cracks, chips, dead pixels, dark spots, discoloration or blemishes. Units will only feature the standard minimal wear and tear that is associated with a used unit.
"Good" Grade - Laptops
"Good" laptops may feature one or several small dings or dents on covers and / or small paint chips on the surface or small hairline cracks in the bezel. Laptop screens may feature uneven light diffusion in screen and may feature subtle blemishes. "Good" Laptops will not feature cracks screens but may feature slight scratching, dead pixels or white spots on the screen.
"Good" Grade - Desktops
"Good" grade desktops may have light scratches on external body and may feature more excessive unit housing and/or external case wear than "Excellent" units, including wear on case / lid. "Good" PCs may feature one or several small dings or dents on covers and / or small paint chips on the surface.
"Good" Grade - Monitors
Displays in the "Good" grade have been fully tested and are functional but may include scratches on body, small paint chips, minor cracks on body, loose and/or wobbly bases. "Good" Display screens may feature uneven light diffusion in screen and may feature subtle to moderate blemishes. "Good" Displays will not feature cracks on screens but may feature slight scratching on screen surfaces from moderate use or wear, dead pixels or white spots on the screen.
Legacy letter grading
Used Smartphone / Refurbished Mobile Phones
A Grade
- No chips, scratches or cracks on the front glass and housing
- No missing or alternative parts
- No sign of liquid damage
- Battery cannot be swollen
B Grade – Same as A Grade except:
- May have light scuffs but no chips or cracks
- Light scratches on housing or front glass
C-Grade – Same as B Grade except:
- Unlimited long shallow scratches on the front glass
- No chips or cracks on the front glass
- Unlimited scratches, chips/dents on back cover housing and corners
- Minor cracks allowed
- Customized housing and aftermarket covers allowed
Refurbished Desktops, Laptops and Monitors
A-Grade
- Overall excellent to very good cosmetic condition. Some may be pristine, others may have light scratches or minor blemishes
- Laptops may have some shiny areas around the keyboard such as the space bar, touchpad or touchpad buttons
- Keyboard keys will be in excellent condition
- Laptop and monitor screens will be blemish free
- Cosmetic blemishes will not impact the overall functionality or performance of the device
B-Grade
- Will have some cosmetic blemishes that include scratches and/or other imperfections
- Minor scratches and dents on the housing
- Laptops may have shiny keys or shiny surfaces around the keyboard however all characters will be legible
- Laptop and monitors screens will have imperfections such as minor scratches, minor chips and/or white spots. There will be no cracking on the screen
- Have the same warranty as A Grade
- Pricing will be cheaper than A Grade
C-Grade
- Same as B-Grade except may have unlimited scratches/blemishes on the screen
- May have cracks/chips or dents on the housing
- Have the same warranty as A Grade
- Pricing will be cheaper than B Grade
