The number of optical cores in an optical fiber is the total number of equipment interfaces multiplied by 2, plus 10% to 20% of the spare quantity, and if the communication mode of the equipment has serial communication and equipment multiplexing, you can reduce the. The number of optical cores in an optical fiber is the total number of equipment interfaces multiplied by 2, plus 10% to 20% of the spare quantity, and if the communication mode of the equipment has serial communication and equipment multiplexing, you can reduce the. The number of optical cores in an optical fiber is the total number of equipment interfaces multiplied by 2, plus 10% to 20% of the spare quantity, and if the communication mode of the equipment has serial communication and equipment multiplexing, you can reduce the number of cores. The number of. Fiber optic cables are essential to modern networks, enabling high-speed and reliable data transmission. Understanding this key aspect is crucial for making the right choice. In this post, you'll. Proterial Cable's stan-dard singlemode glass, known as OS2, offers superior performance. 5 micron core) and advancing to 50 micron core designs like OM2, OM3, and OM4.