Patchcord ST/UPC – ST/UPC Singlemode OS2 9/125 G675A1 Duplex Zip 2.0mm OFNR Yellow

Patchcord ST/UPC – ST/UPC Singlemode OS2 9/125 G675A1 Duplex Zip 2.0mm OFNR Yellow from Red Cable Technology (RCT) is a Shaxon singlemode patch cord pairing high-quality ST/UPC connectors with a rugged yellow 2.0mm duplex zip cord jacket rated OFNR for riser runs, built on 9/125 OS2 fiber. Polarity is clearly marked with yellow polarity labels.

Features & Specs:

• Connectors — ST/UPC (both ends): one of the most widely used connectors, especially in multimode networks such as college campuses and most buildings; spring-loaded, keyed, push-in-and-twist mechanism; bayonet mount with a long cylindrical 2.5mm ceramic or polymer ferrule to hold the fiber; very easy to use.
• Fiber: 9/125 singlemode OS2, G675A1 bending-insensitive fiber — low macro-bending sensitivity and low water-peak level, comprehensively optimized for use in the O-E-S-C-L band (1260–1625 nm), with good resistance to additional losses from low macro-bending in the 1625 nm region; supports L-band applications and installs easily without excessive care when storing the fiber.
• Jacket: yellow, 2.0mm duplex zip cord, OFNR rated.

Where it fits

Multimode fiber is the cost-effective pick for inside buildings or corporate campuses, where runs rarely exceed a few hundred meters. Single-mode is better suited to longer-distance runs — it transmits farther but typically calls for more expensive equipment.

Planning note

When weighing on-premises vs. access-network fiber replacement or a new installation, we recommend replacing legacy OS1 with a new bend-insensitive OS2 (ITU-T G.657A1) SMF cabling system to support longer reach with enhanced link performance. For ultra-long-distance transmissions that run exclusively C-band and L-band with optical amplifiers, check the ITU-T recommendations for the most appropriate SMF types.