There are two ways to terminate fiber optics: mechanically and fusion splice. Whichever is used the end goal is to attach a connector. There are reasons to use one over the other but that is for another post. Here are the main differences between fusion splice and mechanical fiber termination.
Mechanical terminations are done by hand with hand tools. A qualified technician would prep the fiber strand, insert the strand in a connector then “crimp” the connector to lock the fiber strand in place. This will provide a working reliable connection but because the connection is done by hand it is nearly impossible to ensure perfect alignment. The result is a working connection with possible signal loss.
Fusion splice terminations require the use of a specially designed machine (Fusion Splicer) and connectors. There is no “crimp” in fusion splicing because a machine actually melts the fiber together. A qualified technician would need to input pertinent information in the fusion splicer and prep accordingly. When done correctly fusion splicing is the most reliable and effective way to terminate fiber.