{"id":20229,"date":"2026-06-25T11:34:40","date_gmt":"2026-06-25T03:34:40","guid":{"rendered":"https:\/\/myliontech.com\/?p=20229"},"modified":"2026-06-25T11:34:40","modified_gmt":"2026-06-25T03:34:40","slug":"ont-backup-power-requirements-for-ftth-mini-ups-guide","status":"publish","type":"post","link":"https:\/\/myliontech.com\/fr\/ont-backup-power-requirements-for-ftth-mini-ups-guide\/","title":{"rendered":"Exigences d'alimentation de secours ONT pour les \u00e9quipements FTTH chez le client"},"content":{"rendered":"
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Introduction : Le risque cach\u00e9 des alimentations de secours de passerelle<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The rapid expansion of FTTH networks has revolutionized broadband access, offering unprecedented bandwidth and low latency. However, unlike traditional PSTN circuits, which carried low-voltage power from the central office, FTTH architecture relies on active electronic equipment\u2014ONT\u2014located directly at the customer premises.<\/p>

When the local AC mains fail, the fiber connection goes dark, rendering voice and data services unavailable. This article explores the technical requirements for robust ONT backup power<\/b><\/u><\/strong><\/a>\u00a0and why deploying professional-grade\u00a0Solutions Mini UPS<\/b><\/u><\/strong><\/a>\u00a0is now a non-negotiable component of modern network infrastructure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Understanding FTTH Architecture and the Vital Role of the ONT<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The Paradigm Shift<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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In the legacy copper era, the telephone company provided both signal and power. Even during a local grid outage, a standard copper-wire telephone would remain functional because it drew power from the central office switch. FTTH fundamentally changes this topology. Fiber optic cables do not conduct electricity. Therefore, the intelligence at the edge\u2014the ONT\u2014requires a local power source.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The Scope of CPE<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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CPE has evolved into a complex ecosystem. It typically includes the ONT (which converts optical signals to Ethernet\/VoIP), a residential Wi-Fi gateway, and often separate VoIP adapters. When a power anomaly occurs, all these devices suffer. Without localized battery backup, the subscriber loses not just entertainment services, but essential communication capabilities.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Why Backup Power Matters for ONT<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Emergency Lifelines and E911<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Service providers are increasingly bound by regulatory mandates, such as the FCC\u2019s requirements regarding E911 availability. If a customer cannot access emergency services during a power outage due to network downtime, the liability and safety implications are severe. Providing backup power is essentially the provision of safety.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Business Continuity & Remote Work<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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For B2B clients, the stakes are even higher. A localized power flicker can trigger a reboot sequence in an ONT that takes several minutes to handshake with the OLT (Optical Line Terminal) at the central office. In a remote work or business environment, this downtime results in lost productivity, dropped VPN tunnels, and interrupted VoIP calls.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Hardware Safeguarding<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Grid power is rarely “clean.” Brownouts, voltage sags, and high-voltage surges are common in aging electrical grids. An ONT, being a sensitive piece of networking equipment, is highly susceptible to these fluctuations. Consistent voltage delivery not only prevents reboots but also extends the operational lifespan of the hardware by mitigating stress on internal power supply components.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Key Technical Requirements for ONT Backup Power Solutions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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When evaluating backup solutions for FTTH<\/b><\/u><\/strong><\/a>, technical specifications must go beyond simple capacity.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Voltage Precision & Compatibility<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Most ONTs operate on\u00a012 V CC<\/b><\/strong>, though some older or specific carrier-grade models may require 9V<\/b><\/strong>\u00a0or different barrel jack polarities. A robust backup solution must offer precise, stabilized output voltage. Fluctuations in output voltage during battery discharge can lead to instability or hardware damage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Capacity and Runtime Metrics<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The “gold standard” for residential backup is typically defined by the need to sustain services for 4 to 8 hours. To calculate this, one must consider the power draw (in Watts) of the CPE.\u00a0ONT Power Consumption<\/b><\/strong>: Typically 5W\u201315W. For accurate runtime planning, ISPs should measure actual device power draw rather than relying solely on adapter ratings, as real-world consumption often differs from label specifications.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Battery Chemistry Evolution<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Li-ion & LiFePO4:<\/b><\/strong>\u00a0These offer superior energy density, a much longer cycle life (often 1000+ cycles), and better stability at ambient temperatures. LiFePO4 in particular is favored for its enhanced safety profile and thermal stability.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Intelligent Power Management<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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An ideal system includes a “Zero Millisecond<\/b><\/strong>” transfer time. When grid power drops, the battery switch must be instantaneous. Any delay causes the ONT to power-cycle, which defeats the purpose of the backup. Furthermore, integrated Battery Management Systems (BMS<\/b><\/strong>) are essential to prevent overcharge, over-discharge, and short-circuiting.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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DC Mini UPS: The Modern Solution for ONT Backup Power<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Why DC Mini UPS Outperforms Traditional AC UPS<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Traditional AC UPS units execute a double-conversion process: pulling AC mains, converting to DC for battery storage, and reverting to AC for device consumption. This process inherently generates thermal waste and energy loss.<\/p>

In contrast, a DC Mini UPS accepts AC input, stores it as DC, and outputs pure DC directly to the telecom hardware. This architecture offers several advantages:<\/p>

Fonctionnalit\u00e9<\/b><\/strong><\/p><\/td>

Onduleur traditionnel<\/b><\/strong><\/p><\/td>

Onduleur mini CC<\/b><\/strong><\/p><\/td><\/tr>

Efficacit\u00e9<\/b><\/strong><\/p><\/td>

Low (multiple AC\/DC conversions)<\/p><\/td>

High (direct DC-to-DC, 90-95%)<\/p><\/td><\/tr>

Facteur de forme<\/b><\/strong><\/p><\/td>

Encombrant, n\u00e9cessite de l'espace au sol<\/p><\/td>

Compact, \u00e0 fixer au mur<\/p><\/td><\/tr>

Autonomie de la batterie<\/b><\/strong><\/p><\/td>

2\u20133 years (lead-acid)<\/p><\/td>

5\u201310 years (Li-ion\/LiFePO\u2084)<\/p><\/td><\/tr>

Entretien<\/b><\/strong><\/p><\/td>

High (periodic testing)<\/p><\/td>

Zero-maintenance (plug & play)<\/p><\/td><\/tr>

Co\u00fbt par abonn\u00e9<\/b><\/strong><\/p><\/td>

\u00c9lev\u00e9 ($100+)<\/p><\/td>

Low\/optimized for volume<\/p><\/td><\/tr><\/tbody><\/table>

A direct DC-to-DC backup path eliminates unnecessary conversions, improving efficiency by up to\u00a025%\u00a0and extending battery life compared to AC-based alternatives.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Mylion Mini UPS Solutions for ONT Backup Power<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Mylion propose une gamme compl\u00e8te de\u00a0<\/b><\/strong>Solutions d'alimentation sans coupure (UPS) mini CC<\/b><\/u><\/strong><\/a>\u00a0<\/b><\/strong>specifically designed for ONT, ONU, router, and CPE backup applications. These solutions support 5V, 9V, 12V, and 24V DC outputs, covering the power needs of the vast majority of routers, CPE, ONT, and ONU devices.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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MU68 Mini UPS \u2013 The Standard for ONT\/ONU Backup<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The MU68 is designed specifically for routers, ONTs, ONUs, modems, and other small network devices.<\/p>