We have known that PC, UPC, APC is standard of the fiber optic connectors, PC, UPC, APC are short for: Physical Contact (PC), Ultra Physical Contact (UPC), and Angled Physical Contact (APC), they are actually the polish style of fiber optic ferrules. Below is a picture of the fiber optic ferrules. Unlike copper cables with copper thread in the connectors as connection media, fiber optic connectors are with these ceramic ferrules for connection, and different fiber optic connectors the ferrule size and length and polish styles are different, as can be seen on the picture. Such ferrules is inside the fiber optic connectors and with fiber glass from the fiber optic cable to plug into the ferrule for linking. The different polish of the fiber optic connector ferrules result in different performance of them, mainly on the back reflection (return loss),.Generally, PC type is required at least 40dB return loss or higher, UPC is 50dB or higher, APC is 60dB or higher. (As we know, the higher the return loss the better the performance). Insertion loss of them all should be less than at least 0.3dB, the lower the insertion loss the better the performance. Single mode fiber optic cables can be with PC, UPC or APC polished connectors, while multimode there is no APC ones. Connectors: LC, SC, FC,ST Lengths: 1 Meter to 150 Meters Cable Type: Singlemode Microns: 9/125 Polish: Ultra Polish ( UPC ), Angle Polish ( APC ), Physical Contact ( PC )Below is a list of more types of Angle Polished ( APC ) and Ultra Polished ( UPC ) singlemode fiber optic patch cables Duplex we carry in stock.FCA Angle Polished to FCA Angle Polished 150 Foot Singlemode Fiber Optic Patch Cable 9/125FCA Angle Polished to FCA Angle Polished 250 Foot Singlemode Fiber Optic Patch Cable 9/125FCA Angle Polished to FCA Angle Polished 350 Foot Singlemode Fiber Optic Patch Cable 9/125FCA Angle Polished to SCA Angle Polished 30 Meter Singlemode Fiber Optic Patch Cable 9/125FCA Angled Polished to SCU Ultra Polished 200 Foot SingleMode Fiber Optic Patch Cable 9/125FC to SCA Angle Polished 3 Meter Singlemode Fiber Optic Patch Cable 9/125LCA Angle Polished to LCA Angle Polished 1 Meter Singlemode Fiber Optic Patch Cable 9/125LCA Angle Polished to LCA Angle Polished 10 Meter Singlemode Fiber Optic Patch Cable 9/125LCA Angle Polished to LCU Ultra Polished 6 Meter Singlemode Fiber Optic Patch Cable 9/125LCA Angle Polished to SCA Angle Polished 6 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCA Angle Polished 1 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCA Angle Polished 2 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCA Angle Polished 3 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCA Angle Poliched 4 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCA Angle Polished 5 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCA Angle Polished 10 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCA Angle Polished 15 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 1 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 2 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 3 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 4 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 5 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 6 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 7 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 10 Meter Singlemode Fiber Optic Patch Cable 9/125LC to SCU Ultra Polished 15 Meter Singlemode Fiber Optic Patch Cable 9/125LCU Ultra Polished to SCA Angle Polished 3 Meter Singlemode Finber Optic Patch Cable 9/125LCU Ultra Polished to SCA Angle Polished 5 Meter Singlemode Fiber Optic Patch Cable 9/125LCU Ultra Polished to SCA Angle Polished 8 Meter Singlemode Fiber Optic Patch Cable 9/125LCU Ultra Polished to SCA Angle Polished 9 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCA Angle Polished 1 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCA Angle Polished 2 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCA Angle Polished 3 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCA Angle Polished 7 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCA Angle Polished 30 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCU Ulra Polished 1 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCU Ultra Polished 2 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCU Ultra Polished 3 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCU Ultra Polished 5 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCU Ultra Polished 7 Meter Singemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCU Ultra Polished 10 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to SCU Ultra Polished 15 Meter Singlemode Fiber Optic Patch Cable 9/125SCA Angle Polished to ST 2 Meter Singlemode Fiber Optic Patch Cable 9/125SC to SCA Angle Polished 1 Meter Singlemode Fiber Optic Patch Cable 9/125SC to SCA Angle Polished 2 Meter Singlemode Fiber Optic Patch Cable 9/125SC to SCA Angle Polished 3 Meter Singlemode Fiber Optic Patch Cable 9/125SCU Ultra Polished to SCU Ultra Polished 1 Meter Singlemode Fiber Optic Patch Cable 9/125SCU Ultra Polished to SCU Ultra Polished 2 Meter Singlemode Fiber Optic Patch Cable 9/125LC to LCU Ultra Polished 3 Meter Singlemode Fiber Optic Patch Cable Plenum 9/125Looking for a different fiber cable? ConnectZone stocks a large inventory of fiber optic patch cords at low cost. 10g Gigabit Aqua Fiber Optic Patch Cable 50/125Multimode Duplex Fiber Optic Patch Cable 62.5/125Singlemode Duplex Fiber Optic Patch Cable 9/125Fiber Optic Mode Conditioning CablesMore details about this new line of custom colored fiber cables coming soon...http://www.connectzone.com/custom-colored-singlemode-fiber-cables.html  ConnectZone.com is located in Lynnwood Washington just 20 minutes north of Seattle, & Bellevue / Redmond Washington; in the greater Puget Sound Area. Feel free to stop by or contact us by Phone 425-212-4400 Fax 425-212-4394 Email sales@connectzone.comConnectZone.com 12512 Beverly Park Road Suite b1b Lynnwood Wa 98087