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

**Patchcord SC/UPC – ST/UPC Singlemode OS2 9/125 G675A1 Duplex Zip 2.0mm OFNR Yellow** from **Red Cable Technology (RCT)** is a **duplex** fiber patch cord linking **SC/UPC** on one end to **ST/UPC** on the other, built on **bend-insensitive G675A1 singlemode (9/125 OS2)** fiber inside a rugged yellow **2.0mm OFNR** duplex zip cord jacket.

**Features & Specs:**

• Shaxon’s SC/UPC – ST/UPC 9/125 OS2 patch cord with high-quality ST and SC connectors
• Rugged yellow 2.0mm duplex zip cord OFNR jacket; polarity clearly marked with yellow polarity labels
• SC connectors ship unclipped but include the clip to be applied in the field if desired
• SC connector: snap-in design with a 2.5mm ferrule much like the ST; simple, rugged, and low cost, with a straightforward push-on/pull-off operation that makes it a popular choice
• ST connector: spring-loaded, keyed “push in and twist” design with a bayonet mount and a long cylindrical 2.5mm ceramic or polymer ferrule; remains one of the most widely used connectors, especially in multimode networks such as college campuses and most buildings
• G675A1 bend-insensitive single-mode fibre with low macro-bending sensitivity and low water-peak level; comprehensively optimized for the O-E-S-C-L band (1260–1625 nm); resists additional losses from macro-bending in the 1625 nm wavelength region — supports L-band applications and installs easily without excessive care when storing the fibre

## Upgrading from Legacy OS1

When weighing on-premises versus 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.

## Single-Mode vs Multi-Mode on the Job

Multi-mode fiber is typically cost-effective inside buildings or corporate campuses, while single-mode is better suited to longer-distance runs. Single-mode fiber transmits over greater distances but typically requires more expensive equipment; multi-mode is the cost-effective choice for installations where lengths do not exceed a few hundred meters.

## Ultra-Long-Distance Note

For other ultra-long-distance transmissions that employ exclusively C-band and L-band with optical amplifiers, refer to the ITU-T recommendations for the most appropriate SMF types. The International Telecommunication Union (ITU) is the United Nations specialized agency for information and communication technologies – ICTs.