Exam N10-008 topic 1 question 444 discussion

A. Tx/Rx being reversed is common and the fastest way of verifying. Spending time walking/driving between buildings is not efficient to clean the connectors or use an OTDR.

The FIRST step the technician should perform to troubleshoot the issue is C. Clean the fiber patch cord connectors in both buildings. Dirty or contaminated fiber patch cord connectors can cause signal loss and poor network performance, and may even prevent a link from being established. Before trying any other troubleshooting steps, it is important to ensure that the fiber patch cord connectors are clean and free of debris.

Step 1 troubleshooting, question the obvious. Is it plugged in (correctly)

It’s A people…troubleshooting 101 tackle the easiest thing first…plus this is actually a very common fix…done it dozens of times during repairs or installations…any other choices tells me you having been out in the real world.

Before attempting more complex troubleshooting steps such as reversing TX/RX, replacing patch cords, or using an Optical Time Domain Reflectometer (OTDR), it's essential to ensure that the fiber patch cord connectors are clean.

should the technician perform FIRST to troubleshoot the issue

A TX/RX reversing would be fasted way to troubleshoot. Other options you have to go back and forth to 2 buildings

You'll first want to perform a process of elimination by identifying where the problem is, you can do this by checking the fiber optic connections for a break with an Optical Time-Domain Reflectometer (OTDR). OTDR is used for fiber optic cables. Instead of reading resistance of a wire like the Electronic Time-Domain Reflectometer (ETDR) to determine location of break, it uses light that will reflect back to the device. This can go out to many miles, essential for underground fiber. A fiber light meter is a device that provides a continuous wave of stable source of energy for attenuation measurements (amplitude reduction value). This light is a laser, or LED that is going to be stabilized using an automatic gain control mechanism to measure how effective a fiber optic cable is transmitting that light.

As much as I appreciate the community responses, I'm going to go with D. The key for me was that these are two new switches. Surely the fiber cable is not going to be dirty, hopefully, on the onset of two new devices being installed. So to get an idea of how the cables are functioning, I need to connect to the OTDR.

As someone who can speak from experience, 99.99% of the time it's TX/RX being reversed.

At first I thought the answer was D. But I found an article in LinkedIn that has me changing my answer. "Before use OTDR, first, you should watch out if the connectors are clean. If it’s dirty, then clean it. Otherwise, it will make measurements unreliable, noisy or even impossible. What’s worse, it may damage the OTDR." D is a good option. But you would have to do C before D anyways.

Walking to another building would take a lot of time especially if they are far separated apart from each other. And when you come there and clean the

Wouldn't the connectors have to be SO dirty, that there is 0/no connectivity? Slow connection perhaps, but no connection seems like a stretch. I would go with (A), but my head hurtie!

Answer is c

Dirt, dust, or grease in the transmission path will greatly reduce signal strength or block transmission completely. Most commonly, this occurs at a connector.

With an OTDR you can find at which lengt there is a cable break. you need a scope and cleaning equiptment for a proper view of the (not connected!!!) fiber head. ya should clean a singlemode (also mm but hey) b4 you connect them. i go with swapping tx/rx

The first step the technician should perform to troubleshoot the issue is to check if the fiber patch cord connectors in both buildings are clean and free from any dirt, debris or damage. Therefore, the correct answer is C - Clean the fiber patch cord connectors in both buildings.