September 2026: New Standards for EMC and Fibre Optic Testing in Telecommunications

In September 2026, two significant updates in Telecommunications and Audio/Video Engineering standards have been published, shaping the path forward for reliable electronic systems and next-generation fibre optic infrastructure. These latest international standards—the revision of EMC immunity tests for DC power ports and advanced measurement techniques for rectangular ferrule endfaces—bring critical improvements. For professionals aiming to ensure product integrity, avoid costly compliance gaps, and drive network performance, these updates represent an essential knowledge investment.

Overview / Introduction

The telecommunications landscape is fast-evolving, driven by demands for uninterrupted connectivity and robust audio/video transmission. Standards play a pivotal role, safeguarding performance, interoperability, and regulatory compliance for both network and device manufacturers. This article explores the newly published September 2026 standards for electromagnetic compatibility (EMC) and fibre optic interconnects, offering an in-depth look at technical revisions and practical implementation strategies.

Whether you are a quality manager, engineer, or a procurement specialist, understanding these requirements is vital for future-proofing products and aligning with international best practices.

Detailed Standards Coverage

EN IEC 61000-4-29:2026 - Enhanced EMC Immunity Testing for DC Input Power Ports

Electromagnetic compatibility (EMC) - Part 4-29: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests

This updated standard defines rigorous methods and procedures for evaluating the immunity of electrical and electronic equipment to voltage dips, short interruptions, and voltage variations at DC input power ports. The goal is to establish a reproducible basis for testing systems, ensuring resilience against transient power issues commonly encountered in telecommunications, control systems, and industrial electronics.

• Scope: Applies to equipment powered via external low-voltage DC networks. The standard targets product committees and manufacturers to select relevant test severities for their specific solutions, focusing on immunity to voltage fluctuations that can compromise functionality in critical installations.
• Key Requirements:
  • Specifies preferred test levels (% of nominal voltage) and test durations for dips, short interruptions, and variations
  • Details test generator characteristics, including support for new (higher) DC network voltages, precise duration tolerances, and requirements for both high- and low-impedance conditions
  • Mandates generator verification, including output voltage, switching behavior, and peak inrush current capabilities
  • Covers the complete test set-up, execution, environmental conditions, and comprehensive reporting
• Who Should Comply: Electronic product manufacturers, network equipment vendors, and system integrators supplying to telecom, broadcast, defense, automotive, and industrial automation sectors—all of which rely on DC-powered infrastructure
• Practical Implications:
  • Enhanced assurance in the stable operation of telecom and AV network equipment
  • Greater clarity for compliance audits and product certifications
  • Improved risk mitigation against costly service interruptions caused by voltage anomalies
• Notable Changes from Previous Edition:
  • Test generator voltage raised to align with emerging DC network standards
  • Explicit tolerances for voltage deviation durations
  • Stricter current limits during short interruptions (low impedance)
  • Expanded technical clarifications on generator specs and result evaluation
  • Detailed evaluation/reporting methods and DC environment description

Key highlights:

• Expanded voltage ranges and precise testing for new DC networks
• Standardized test generator specs and verification methods
• Clearer compliance and technical reporting guidelines

Access the full standard:View EN IEC 61000-4-29:2026 on iTeh Standards

EN IEC 61300-3-30:2026 - Measurement of Endface Geometry for Fibre Optic Rectangular Ferrules

Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-30: Examinations and measurements - Endface geometry of rectangular ferrule

The third edition of this standard focuses on advanced procedures for examining and measuring the endface geometry of rectangular multifibre ferrules, a cornerstone of modern fibre optic connectivity infrastructure. Proper endface geometry is crucial for minimizing signal loss, ensuring connector reliability, and supporting high-bandwidth audio/video and data applications.

• Scope: Provides a standardized method to measure the critical geometric attributes—fibre position relative to the endface, endface angles, fibre tip radii, and core dip for multimode fibres—on rectangular multifibre ferrules (e.g., those defined in IEC 61754-5 and 61754-7).
• Key Requirements:
  • Uses a three-dimensional interferometric analyser for precise surface profiling
  • Defines measurement regions for the rectangular ferrule, including new regions to support MT-16 and MT-32 ferrule types
  • Introduces calculation methods for geometry limits (GL parameters) covering ferrules with 4, 8, 12, 16, 24, and 32 fibres
  • Mandates the reporting of detailed geometric parameters, including coplanarity and fibre plane angles
  • Ensures proper ferrule orientation relative to guide holes for optimal connector mating
• Who Should Comply: Manufacturers of fibre optic connectors and passive components, communications network providers, and certified test laboratories
• Practical Implications:
  • Improved connector performance and longer service life
  • Better network reliability through repeatable and standardized measurements
  • Reduced risk of signal degradation or downtime
• Notable Changes from Previous Edition:
  • New geometric region definitions for evolving ferrule types
  • Comprehensive parameter tables for expanded fibre counts
  • Refined methods for adjacent fibre measurement and core dip calculations
  • Enhanced figures and documentation for easier interpretation by test engineers

Key highlights:

• Extended to cover MT-16, MT-24, and MT-32 ferrules
• New clarity around measurement regions and definitions
• Improved test repeatability for multi-fibre passive components

Access the full standard:View EN IEC 61300-3-30:2026 on iTeh Standards

Industry Impact & Compliance

Adopting these latest international standards is more than a regulatory checkbox. For businesses in telecommunications and audio/video engineering, compliance supports:

• Consistent product performance under real-world power/network conditions
• Superior reliability and safety for end users
• Increased market acceptance and competitive differentiation, particularly in regions where international certification is mandatory

Compliance Considerations:

• Many telecommunications and AV device manufacturers operate under tight certification timelines—these standards are enforceable upon their national and regional adoption, commonly with a 12–18 month transition period
• Early adoption can simplify global market access, reduce testing duplication, and mitigate enforcement risks

Benefits of Compliance:

• Enhanced system uptime—critical for carriers, data centers, and media production
• Lowered risk of dispute and liability from voltage or connector failures
• Streamlined quality management and easier documentation during audits

Risks of Non-compliance:

• Fines, blocked market access, or costly product recalls
• Reputational harm from network or service outages
• Higher warranty and maintenance costs due to undetected design flaws

Technical Insights

Both standards emphasize rigorous, reproducible measurement and testing approaches, vital for:

• Test Planning: Early integration of EMC and fibre geometry requirements into product design and validation phases

• Common Technical Needs:

  • Accurate definition of reference conditions (e.g., rated DC voltage, climatic and EMC test environments, connector region dimensions)
  • Use of calibrated and validated measurement equipment (e.g., programmable test generators, 3D interferometers)
  • Transparent documentation and clear reporting, supporting traceability and certification

• Best Practices:

  1. Engage interdisciplinary teams (design, test, compliance) early in development
  2. Automate test procedures where practical to reduce error and enhance throughput
  3. Stay updated on normative changes and supplement internal guidelines as standards evolve

• Testing and Certification:

  • Partnering with accredited laboratories for third-party validation is strongly recommended
  • Build internal expertise on interpreting test results and integrating them into larger quality management systems
  • Maintain readily accessible records to facilitate swift regulatory or customer audits

Conclusion / Next Steps

The September 2026 standards releases for electromagnetic compatibility and fibre optic component geometry reflect the telecommunications sector’s rapid advancement. By understanding and adopting EN IEC 61000-4-29:2026 and EN IEC 61300-3-30:2026, organizations place themselves at the forefront of global best practice—increasing system robustness, reducing downtime, and enhancing customer satisfaction.

Recommendations:

• Review the full text of the new standards for all technical and administrative requirements
• Audit internal procedures and supply chains to identify any necessary updates
• Leverage iTeh Standards’ authoritative platform for ongoing updates and detail-oriented compliance support

Explore these and other cutting-edge standards now at iTeh Standards. Stay ahead by subscribing for timely alerts and implementation resources.