Basic Troubleshooting Tips for Fiber Optic Communication Utilized in Fire Alarm Networks.
Generally, the fire alarm technician does not have access to sophisticated electronic equipment required to troubleshoot fiber optic systems such as an optical time-domain reflectometer (ODTR),
power meters and other sophisticated optical diagnosing equipment.
Two relatively cheap tools the fire alarm technician can utilize are a fiber optic light and a fiber optic cleaning stick.
Visual fault indicating lights are available on Amazon for about $30.
Cleaning sticks run about the same price, but you’ll need to know what kind of connection your system utilizes.
Most connections I see are either ST or LC connectors.
The most common problems I run across are either dirty connectors or broken fiber strands.
Retaining fiber connection covers in a small zip lock bag in the panel and cleaning any connectors that must be disassembled are a good start to preventing problems.
However, fiber strands are brittle and cannot be bent past acertain radius or they break.
I have found installing a WIC box or other bulkhead near the panel and utilizing a jumper to interconnect between the bulkhead and the panel saves a lot of heartache.
If a jumper is damaged it is easy to install a new one and return the fiberlink to working order.
On the other hand,
if you break a strand on the main fiber optic line,
you usually require a communication technician to come in and repair the fiber by fusion splicing a new connector on or you have to re-pull the fiber.
Thus the addition of a WIC box usually means you are money ahead in the long run.