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.

Certified Refurbished OneAccess ONE540 XM GB5T Network Termination Unit
The OneAccess ONE540 XM GB5T is a high-performance SIP-enabled network termination unit featuring 5 Gigabit Ethernet ports (1 WAN + 4 LAN), supporting up to 150 users with 200,000 packets per second performance, running OneOS V5.2 operating system, and delivering comprehensive voice-over-IP capabilities for small to medium enterprise networks.
This certified refurbished enterprise-grade router combines robust networking with advanced telephony features, making it the ideal solution for businesses requiring reliable voice and data services over IP networks. Perfect for organisations transitioning from traditional ISDN systems to modern VoIP infrastructure while maintaining connectivity to existing analog devices.
Key Applications and Use Cases
Business Voice Integration: Seamlessly connects ISDN PBX systems via BRA/BRI ports while supporting modern SIP-based IP telephony, enabling smooth migration from legacy voice systems.
Multi-Site Connectivity: Provides reliable WAN connectivity with built-in backup capabilities through G.SHDSL.bis EFM/ATM, ensuring business continuity for mission-critical operations.
SME Network Infrastructure: Delivers enterprise-grade networking features including Quality of Service (QoS), embedded security, and traffic management for businesses with up to 150 users.
Premium Features and Benefits
- High-Performance Processing: 200,000 packets per second throughput with bidirectional routing performance up to 1 Gbps ensuring smooth data flow
- Flexible Voice Connectivity: BRA/BRI ISDN ports for PBX integration and FXS analog ports for legacy devices including phones and fax machines
- Advanced Codec Support: G.711 μ-law/A-law, G.729ab, G.722, and T.38 fax protocol ensuring excellent voice quality and compatibility
- Comprehensive Security: Embedded firewall, access control lists, and IPsec VPN capabilities protecting your network infrastructure
- Intelligent Network Management: Web-based GUI, SNMP support, and BroadWorks compatibility for simplified administration
- Carrier-Grade Reliability: Built for service provider environments with professional-grade components and proven stability
Technical Specifications
- Processor: Enterprise-grade routing processor optimised for voice and data convergence
- Network Ports: 5 x Gigabit Ethernet (1 WAN, 4 LAN), 2 x BRA/BRI ISDN, 2 x FXS analog voice
- Performance: Up to 150 users, 200,000 pps, 1 Gbps bidirectional routing
- Operating System: OneOS V5.2 with SIP gateway functionality
- Power Supply: External 12V DC adapter (not included)
- Dimensions: 275 x 60 x 150 mm (W x H x D) approximately
- Weight: 1.0 kg approximately
- Operating Temperature: Standard commercial range with adequate ventilation required
- Connectivity: Gigabit Ethernet over copper/fiber, G.SHDSL.bis backup capability
- Management: Web GUI (192.168.9.1), CLI, TFTP, HTTP/HTTPS configuration
Quality Assurance and Warranty
This certified refurbished OneAccess ONE540 XM GB5T has undergone Reboot IT's rigorous testing process to ensure optimal performance. All features and functions have been thoroughly tested using cutting-edge diagnostic software, verifying complete operational reliability. As industry experts since 2001, Reboot IT applies stringent quality standards to every refurbished unit, ensuring professional-grade performance.
Important Note: Power adapter is not included with this unit and must be purchased separately.
Operating System Overview
OneOS V5.2 Advantages: Mature, stable platform with comprehensive enterprise features, extensive protocol support, and proven interoperability with major VoIP platforms like BroadWorks.
Considerations: As a legacy system, firmware updates may be limited compared to current-generation platforms, though the existing feature set remains robust for most business requirements.
Device Condition
Excellent Grade: Units show minimal wear with full functionality, ideal for professional environments requiring reliable performance.
Good Grade: Units may show light cosmetic wear but maintain complete operational integrity, perfect for cost-conscious deployments.
Trust and Reliability
Reboot IT has been Australia's trusted partner for enterprise IT solutions since 2001, utilising advanced testing methodologies to ensure every refurbished device meets stringent performance standards. This OneAccess ONE540 XM GB5T comes with comprehensive 1-year warranty coverage, demonstrating our confidence in the thorough refurbishment process.
Ready to transform your business communications? Contact Reboot IT today to secure this high-performance certified refurbished OneAccess ONE540 XM GB5T and experience reliable, professional-grade networking at exceptional value.
Brand | OneAccess |
Bundle Description | None |
Connector Type | Ethernet RJ-45 |
Custom Bundle | No |
Device Connectivity | Wired |
Form Factor | None |
Interface | Ethernet |
Item Height | None |
Item Length | None |
Item Width | None |
Manufacturer Warranty | 3 Months |
Maximum LAN Data Rate | 1 Gbps |
Maximum Wireless Data Rate | None |
Model | ONE540 XM GB5T |
Processor Model | None |
Network Connectivity | Wired-Ethernet RJ-45 |
Network Management Type | Fully Managed |
Network Type | Ethernet |
Number of LAN Ports | 5 |
Number of WAN Ports | None |
Product Line | None |
RAID Levels | None |
Supported Wireless Protocols | None |
Type | Router |
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 monitors are for those who expect a display showing very little to no signs of previous use. With minimal scuffing or abrasions on the housing/frame and no imperfections on the screen, these units offer an almost-new viewing experience.
"Good" Grade - Laptops
"Good" grade laptops are fully functional but come with signs of more extensive use compared to Excellent grade units. This includes scratches on the laptop body, heavier wear on keyboards, and possible small dents or paint chips. Screens may show uneven light diffusion and subtle blemishes but no cracks.
"Good" Grade - Desktops
Similar to laptops, "Good" grade desktops may exhibit light scratches and more noticeable wear on the case compared to "Excellent" grade PCs. Small dings or paint chips might be present but do not affect functionality.
"Good" Grade - Monitors
Displays in the "Good" grade have been fully tested and are functional but may include body scratches, minor cracks, or a loose/wobbly base. Screens could display uneven light diffusion and moderate blemishes but remain free from cracks.
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