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Fiber Connector Inspection and Cleaning Guide

Fiber Connector Inspection and Cleaning Guide

Dirty endfaces cause up to half of fiber faults. Learn IEC 61300-3-35 inspection, wet-to-dry cleaning, and how to fit it into an optical loss budget.

admin admin 2026-09-26
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100G DAC vs AOC vs Optics: Selection & Troubleshooting

100G DAC vs AOC vs Optics: Selection & Troubleshooting

Compare passive DAC, active DAC, AOC and 100G optics: reach, power, latency, breakout support and the link-down faults each cable type causes.

admin admin 2026-09-19
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MPO/MTP Polarity: Type A, B and C in Practice

MPO/MTP Polarity: Type A, B and C in Practice

Choose MPO/MTP polarity correctly for 40G, 100G, 400G and 800G parallel optics: Type A, B and C mapping, gender, and how to fix a dead link.

admin admin 2026-09-15
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OTDR Trace Interpretation: Events, Loss, Reflectance

OTDR Trace Interpretation: Events, Loss, Reflectance

Read an OTDR trace correctly: identify reflective and non-reflective events, expected loss and reflectance values, and separate bends from bad splices

admin admin 2026-09-15
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Optical Power Budget: How to Calculate a Fiber Link

Optical Power Budget: How to Calculate a Fiber Link

Calculate a fiber link loss budget before pulling cable: Tx power minus Rx sensitivity, dB/km, connector, splice and splitter values, with worked exam

admin admin 2026-09-14
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DWDM 50GHz vs 100GHz Channel Spacing on the ITU Grid

DWDM 50GHz vs 100GHz Channel Spacing on the ITU Grid

ITU-T G.694.1 fixed and flexible DWDM grids: wavelength maths, 50GHz vs 100GHz trade-offs, filtering and OSNR cost, migration and a validation checkli

admin admin 2026-09-14
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Coherent Optics: Pre-FEC BER, OSNR and DSP Checks

Coherent Optics: Pre-FEC BER, OSNR and DSP Checks

Coherent module troubleshooting beyond optical power: pre-FEC vs post-FEC BER, OSNR margin, DSP lock, frequency offset and EVM thresholds explained.

admin admin 2026-09-13
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ROADM Power Equalization and APC Explained

ROADM Power Equalization and APC Explained

Why per-channel power drifts in DWDM, how APC and ROADM equalization correct it, and the amplifier modes, span loss and OSNR margin checks that keep i

admin admin 2026-09-13
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PTP Boundary Clock vs Transparent Clock: Which to Deploy

PTP Boundary Clock vs Transparent Clock: Which to Deploy

Boundary clocks terminate and regenerate PTP; transparent clocks correct residence time per hop. Profiles, error budgets and configuration compared.

admin admin 2026-09-12
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800G ZR/ZR+ Coherent Pluggables: IPoDWDM Design Guide

800G ZR/ZR+ Coherent Pluggables: IPoDWDM Design Guide

How 800G ZR/ZR+ QSFP-DD coherent pluggables work, what ZR versus ZR+ modes deliver in reach and output power, and when IPoDWDM wins over a transponder

admin admin 2026-09-12
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