How to distinguish single-mode or multi-mode just by looking at the surface of the optical cable? In fact, there are digital markings on the outer skin of the optical cable, so we only need to understand the meaning of these markings to understand the properties of the optical cable. Of course, we can also see the optical cable. Is it single-mode or multi-mode.

First of all, let's see how the outdoor optical cable is distinguished from the logo? Here are a few examples:

Example 1: GYXTW-4B1

GYXTW is the optical cable model, which means standard central bundled tube optical cable; 4 means that the optical cable has 4 cores; B1 means that the optical cable adopts single-mode G.652B optical fiber.

Example 2: GYTS-8B4

GYTS is the optical cable model, which means standard loose tube layer stranded optical cable; 8 means that the optical cable has 8 cores; B4 means that the optical cable adopts single-mode G.655 optical fiber.

Example 3: GYFTY-16A1b

GYFTY is the optical cable model, which means standard non-metallic loose tube layer stranded optical cable; 16 means that the optical cable has 16 cores; A1b means that the optical cable adopts multi-mode 62.5/125 optical fiber.

Example 4: GYFTZY-24A1a

GYFTZY is the type of optical cable, which means standard non-metallic loose tube layer twisted flame retardant optical cable; 24 means that the optical cable is 24 cores; A1a means that the optical cable adopts multimode 50/125 optical fiber.

Next, let's see how indoor optical cables can be distinguished from single-mode or multi-mode? In addition to the above methods, indoor optical cables can also be distinguished by color: indoor single-mode optical cables are yellow; indoor multi-mode optical cables are orange.