APC connectors are commonly used by service providers, or for very long distance transmission. However, APC connectors have very specific applications (GPON, FTTx, etc.) and used only when equipment requires them. For identification, single mode UPC connectors are colored blue.ĪPC connectors feature an 8 degree angle at the endface. These connectors have a slightly domed endface. UPC connectors are most commonly installed. Single mode connectors are available either as a UPC (Ultra Physical Contact) or an APC (Angled Physical Contact/Angled Polish Connector). Polish TypeĬonnectors are available with differently polished endfaces, which impact the connector’s level of return loss (back reflection). For more information on the difference between single mode and multimode fibers, visit our article. Multimode fibers require either a 50/125 µm (OM2/OM3/OM4) or 62.5/125 (OM1) connector. Single mode uses a 9/125 connector, which refers to the core and cladding diameter of the optical fiber (i.e. As noted above, LC connectors are a common choice for high-density installations and almost exclusively used in network applications.įiber connectors are designed specifically for the type of fiber you are using. If you know what equipment you will be using, you will be able to determine which style of connector to install. Most ferrules are ceramic, but some are metal or plastic.Ĭonnector style is determined by the equipment that the fiber cable will be plugged into, as well as the type of fiber you are using. It has a bayonet mount and a long cylindrical ferrule to hold the fiber. SC connectors are used with some styles of fiber optic extenders, although LC tends to be more common.Ī ST connectors is a 2.5 mm AT&T™-designed connector. SC connectors, as noted above, are larger than LC connectors. This was the first connector chosen for the TIA-568 standard and is a snap-in connector that latches with a simple push-pull motion. LC connectors, again, are smaller in size and feature a clip design.Ī 2.5 mm snap-in connector. Similarly, SFP (small form-factorable pluggable) modules and fiber optic extenders often require these connectors, although this varies by manufacturer. LC connectors are frequently used as their small footprint makes them ideal for high-density installations. LC Connectors LC MultimodeĪ Lucent connector (LC) is a connector with a 1.25 mm ferrule, half the size of an SC or ST connector. Today, ST connectors are seeing more limited usage.ĭownload your copy of the Connector Selection Guide. LC and SC tend to be the most commonly used styles. In the USA for networking and audio/video, the three most popular styles are LC, SC, and ST. There are quite a few different styles of connectors. In this article, we’ll discuss some common types of fiber optic connectors. ![]() Adapters are available, but it is always easiest to determine both fiber type and connector style ahead of time. Similarly, choosing the right type of fiber optic connector depends on the equipment and type of optical fiber you are installing. ![]() ![]() Think of it this way: if terminating RG6 coax you could use an F, RCA, or BNC connector depending on your installation requirements. There are many different types of fiber optic connector, so choosing the correct one can be confusing.
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