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luleey

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08 Oct 2026

October 7, 2026

BiDi SFP Optical Power Test: A Practical Guide

A BiDi SFP optical power test can be done with a regular optical power meter when the meter receives one known transmitter wavelen...

luleey

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User Operation Guide

07 Oct 2026

October 7, 2026

How to Test MPO Cable Polarity Before Installation

To test MPO cable polarity, you need a position-by-position map—not just a continuity beep or the key direction. For a 12-fiber as...

Fiber splitter in reverse comparison showing downstream optical splitting and coordinated PON upstream combining.

luleey

0

Access Network

05 Oct 2026

October 4, 2026

Can You Use a Fiber Splitter in Reverse?

Yes—many passive couplers allow light to travel both ways, so using a fiber splitter in reverse can guide optical signals from bra...

luleey

0

Network Maintenance

04 Oct 2026

October 4, 2026

OTDR Wrong Fiber Length: Why It Happens and How to Fix It

An OTDR wrong fiber length reading does not necessarily mean the tester is broken. An OTDR times the round trip of a light pulse a...

luleey

0

Network Maintenance

04 Oct 2026

October 2, 2026

Should You Clean a New Fiber Patch Cord?

Should you clean a new fiber patch cord before plugging it in? Treat every new connector as unverified, not automatically dirty or...

luleey

0

Network Maintenance

03 Oct 2026

October 1, 2026

Rogue ONU: Why One Faulty ONU Disrupts a GPON Port

A rogue ONU can do more than lose its own service. If it transmits upstream light outside the time assigned by the OLT, it can int...

luleey

0

User Operation Guide

02 Oct 2026

October 2, 2026

PON Power Meter Calibration

Here's how to calibrate this PON power meter. First, you'll need a stable optical light source and a reference power meter. ...

luleey

0

Data Transmission & Conversion

02 Oct 2026

October 1, 2026

Can Directly Connect Fiber Media Converter to Switch SFP Port

A media converter to switch SFP port link can work directly. In a standard Ethernet installation, the switch can be the optical pe...

luleey

0

Network Maintenance

01 Oct 2026

October 1, 2026

OTDR Ghost Events: How to Spot False Reflections

OTDR ghost events are reflection peaks that appear at positions where no physical event exists. They can make a short fiber look l...

luleey

0

Data Transmission & Conversion

28 Sep 2026

September 27, 2026

Media Converter VLAN Passthrough: A Practical Guide

Media converter VLAN passthrough is possible when the converter preserves the Ethernet tags and accepts the complete frame size. H...

luleey

0

Data Transmission & Conversion

27 Sep 2026

September 26, 2026

Can You Use 10G SFP+ in a 25G SFP28 Port?

A 10G SFP+ in a 25G SFP28 port can work, but only when that exact host port supports a 10GbE electrical mode and accepts the modul...

luleey

0

User Operation Guide

27 Sep 2026

September 27, 2026

LL-L2+MES-425GE2SFP+ User Guide: Login, VLAN & Web Management

This LL-L2+MES-425GE2SFP+ User Guide explains how to access the switch Web Management interface and complete the most common initi...

BiDi SFP Optical Power Test: A Practical Guide

How to Test MPO Cable Polarity Before Installation

Can You Use a Fiber Splitter in Reverse?

Should You Clean a New Fiber Patch Cord?

Rogue ONU: Why One Faulty ONU Disrupts a GPON Port

PON Power Meter Calibration

Can Directly Connect Fiber Media Converter to Switch SFP Port

OTDR Ghost Events: How to Spot False Reflections

Media Converter VLAN Passthrough: A Practical Guide

Can You Use 10G SFP+ in a 25G SFP28 Port?

LL-L2+MES-425GE2SFP+ User Guide: Login, VLAN & Web Management

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