Introduction
For Internet Service Providers (ISPs), telecom operators, and Fiber to the Home (FTTH) system integrators, maintaining a stable last-mile connection is no longer optional—it is a contractual requirement.
Yet many operators continue to face the same challenge: ONU and ONT devices are highly vulnerable to power interruptions, even during brief or local outages. The result is service disruption, customer complaints, and increased SLA pressure.
This article examines the root causes of ONU/ONT power failures, the limitations of traditional power solutions, and how the Mylion MU68 Mini DC UPS delivers a practical, carrier-grade backup power solution for FTTH networks.
The Real Problem: ONU and ONT Devices Are More Vulnerable Than You Think
ONU (Optical Network Unit) and ONT (Optical Network Terminal) devices sit at the very edge of the network—inside homes, offices, and multi-dwelling buildings. While the core network is typically protected by professional power infrastructure, the last mile often is not.
Common challenges faced by ISPs and system integrators include:
- Sudden router and ONU shutdowns during short power cuts
- Unstable voltage from residential power grids
- Customers unplugging power adapters accidentally
- No backup power at the customer premises
- Limited space for installing traditional UPS systems
From a customer’s perspective, this simply looks like “unstable internet.” From an operator’s perspective, it means avoidable downtime, SLA risks, and higher operational costs.
Why Traditional Power Solutions Fail in ONU and ONT Scenarios？
Many operators initially attempt to solve this problem using standard approaches. Unfortunately, most of them are not designed for FTTH edge devices.
1. Standard Power Adapters Offer Zero Protection
Most ONU and ONT devices rely on basic AC-DC adapters. These provide no buffering, no backup, and no voltage stabilisation. Any interruption—even a brief one—results in immediate disconnection.
2. Large AC UPS Systems Are Impractical
Traditional UPS systems are:
- Too bulky for home or wall-mounted installations
- Over-specified for low-power DC devices
- Expensive to deploy at scale
- Complex for installers and end users
For large FTTH rollouts, this approach is neither economical nor practical.
3. Consumer Power Banks Are Not Telecom-Grade
Some operators experiment with consumer battery products, but these often lack:
- 0ms transfer time
- Stable DC output
- Long-term reliability
- Safety certifications required for professional deployment
The result is inconsistent performance and increased support burden.
What Is a Mini DC UPS—and Why It Is Ideal for ONU and ONT Devices？
A Mini DC UPS is specifically designed to support low-power networking equipment such as:
- ONU / ONT
- Routers
- Modems
- IP cameras and access devices
Instead of converting power multiple times (AC to DC and back), a Mini DC UPS provides direct DC backup power, ensuring maximum efficiency and reliability.
For FTTH deployments, this approach offers several key advantages:
- Compact and lightweight design
- Seamless power switching (0ms)
- Easy wall-mount or desktop installation
- Optimised battery capacity for long backup time
- Minimal maintenance requirements
This is exactly where the Mylion MU68 Mini DC UPS excels.
Introduction of Mylion MU68 Mini DC UPS
The MU68 Mini DC UPS is developed by Mylion specifically for telecom and networking applications. It is not a consumer gadget—it is a professional backup power solution engineered for continuous connectivity.
Key Features Designed for ONU and ONT Protection
1. 0ms Transfer Time for Uninterrupted Connectivity
When mains power fails, the MU68 switches to battery power instantly. There is no reboot, no packet loss, and no service interruption.
This is critical for maintaining stable FTTH connections and avoiding unnecessary reconnection cycles.
2. Stable DC Output for Sensitive Telecom Devices
ONU and ONT devices require consistent voltage to operate reliably. The MU68 delivers clean, regulated DC power, protecting equipment from voltage drops and fluctuations.
3. Compact and Installer-Friendly Design
Space is always limited at customer premises. The MU68 features a compact, wall-mountable design, making it ideal for:
- Residential FTTH installations
- Office environments
- MDU and building distribution points
Installers can deploy it quickly without redesigning existing layouts.
4. Extended Backup Time During Power Outages
Despite its small size, the MU68 provides long backup duration, keeping ONU and ONT devices online during short and medium-length outages.
This is particularly valuable in regions with unstable grids or scheduled maintenance interruptions.
5. Optimised for FTTH Rollouts
The MU68 mini ups backup power is designed to scale. ISPs and system integrators can deploy it across thousands of endpoints with consistent performance and minimal support requirements.
Commercial Benefits for ISPs and System Integrators
Beyond technical performance, the MU68 Mini DC UPS delivers measurable business value.
1. Reduced SLA Violations
By preventing unnecessary ONU/ONT downtime, operators significantly reduce SLA breaches caused by power issues.
2. Fewer Customer Complaints
Customers experience stable connections even during power disturbances, leading to higher satisfaction and lower churn.
3. Lower Operational and Maintenance Costs
Every avoided outage means:
- Fewer support calls
- Fewer site visits
- Lower truck roll expenses
Over time, this translates into substantial cost savings.
4. Faster and More Reliable Deployments
The simplicity of the MU68 Mini DC UPS reduces installation time and minimises training requirements for technicians.
Why Operators Choose Mylion?
Mylion is not just a product supplier—it is a long-term power solution partner for telecom and networking professionals.
- Consistent product quality
- Clear technical documentation
- Stable supply capability
- Support for large-scale deployments
Mylion focuses on reliability, compliance, and long-term cooperation, aligning closely with European business expectations.
Conclusion: A Smarter Way to Protect ONU and ONT Devices
Power instability should never be the reason a fibre network goes offline.
For ISPs, telecom operators, and system integrators looking to improve reliability at the last mile, the Mylion MU68 Mini DC UPS offers a practical, scalable, and cost-effective solution.
By ensuring continuous power for ONU and ONT devices, operators can protect SLAs, reduce operational costs, and deliver the stable connectivity their customers expect.
Mylion MU68 Mini DC UPS is not just a backup—it is an investment in network reliability.
English 
简体中文 
Deutsch 
Français 
Italiano 
Español