A Step-by-Step Guide to Diagnosing and Replacing Your Fiber Optic Cable

At times, our routers may experience connectivity issues, which could stem from a damaged fiber optic cable. While service providers often address these issues swiftly, immediate action is sometimes crucial, especially when working remotely or in urgent need of internet access. Several factors could lead to router malfunctions, and identifying the exact cause is essential before deciding whether to replace the cable.

If the fault lies within the cable, swapping it out is a straightforward task that doesn’t require deep technical expertise. However, it’s important to pinpoint the problem accurately to avoid unnecessary expenses and effort.

optical cable

Ensuring the Cable is the Culprit

Before rushing to buy a new cable, confirm that it’s the actual source of the problem. The fault might lie elsewhere, and the fiber cable could be intact. To verify this, you’ll need two basic yet effective tools: a GPON power meter and a visual fault locator laser, both of which are affordable and user-friendly.

The GPON power meter measures the signal strength reaching the cable’s end. Simply activate the meter, connect the cable, and check the display for a power level between -15 and -25 dB. A reading above -25 dB indicates insufficient power, which could be the problem.

Using a Visual Fault Locator Laser

Furthermore, a visual fault locator laser is crucial for pinpointing a cable’s breakage point. This device emits a red light inside the cable, making any breaks visible. Connect the cable to the laser, switch it on, and observe. If light escapes from the cable at any point other than the end, it’s a sign of breakage, and you’ll need a replacement.

Selecting the Right Replacement Cable

Upon confirming cable damage, you can proceed to replace it yourself. Purchase a cable with similar specifications to the defective one, but what specifications should you look for?

Pay close attention to the connector type. SC/APC connectors are typically needed for a secure and lossless connection to the router and wall socket. Additionally, the cable length is important. Measure the distance between the wall socket and your router to choose a cable that’s neither too short nor excessively long, preventing undue stress or bending.

When installing the new cable, handle it gently, avoid sharp bends, and refrain from knotting it to keep it tidy. This approach helps maintain the cable’s integrity and prevents future connectivity issues.