Multimode OM1 ( 62.5 /125) | LC to ST | 2 Meter ( 6.56 ft) Fiber optic cabling is the medium of choice for longer distance and challenging cabling runs. These cables are thinner than copper patch cords and immune to EMI (Electromagnetic Interference) making them perfect for riser runs and uplink cables. There are two basic types of fiber cabling, single-mode and multi-mode. The cables listed here are multi-mode. Inside these cables you will find three basic layers. Starting from the inside, you have the core which is surrounded by the cladding.
Both are protected with the jacket on the outside. Multi-mode cables have a thicker "core size". The core size is simply the thickness of the optical fiber inside the cladding. The cladding is material that surrounds that core which basically serves as the boundary for the signal, keeping the light refined to the core and not allowing it to escape. The thicker the core size, the more refraction the signal exhibits, the more signal degradation that occurs and the shorter the distance an intelligible signal can transmit. For example, these cables are 62.5 /125.
62.5 is the diameter of the core, and 125 is the diameter of the cladding, both in micrometers. Lastly, the jacket is the part of the cable you see. This layer protects the cable and provides easy identification based on its color. TIA-598C recommends orange for multi-mode. LC connections allow higher density applications based on its smaller diameter. The LC connection, commonly refereed to as Lucent Connection, Little Connector or Local Connector, is commonly used today for uplink modules and other devices. This connector is a "snap" type, has a ferrule diameter of 1.25 mm and defined by IEC 61754-20.
ST connectors are a "bayonet" style end, often called Straight Tip, and are primarily used for multi-mode applications. These types of connectors are not common and defined by IEC 61754-2. Ferule's on these ends measures 2.5 mm.
Quick Specs: OM1 Multi-mode Fiber 62.5 /125 LC to ST 2 Meters ( 6.56 ft) Orange PVC (Polyvinyl Chloride) Jacket 2000M (6562 ft) @ 100Mps (can vary depending on optical transceiver, modal bandwidth and wavelength) 275M (902 ft) @ 1Gbps (can vary depending on optical transceiver, modal bandwidth and wavelength)
Applications: Most commonly used to connect Cisco uplink modules and various other fiber modules Uplink and riser cabling