High core counts (120–144 cores, and custom up to 288 cores) use 6–12 buffer tubes, with advanced fiber management to keep the cable flexible enough for installation. 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. For example, the total number of cores in an MTP®-8 trunk cable equals 4 (number of branches) x 8 (MTP-8. “The core of a fiber optic cable is the central transparent portion of the optical fiber made up of glass or plastic which actually receives the light signals for data transmission purposes.
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