{"id":12828,"date":"2026-10-14T09:28:56","date_gmt":"2026-10-14T09:28:56","guid":{"rendered":"https:\/\/cablefam.com\/?post_type=product&p=12828"},"modified":"2026-10-14T09:28:56","modified_gmt":"2026-10-14T09:28:56","slug":"sc-upc-fiber-optic-loopback","status":"publish","type":"product","link":"https:\/\/cablefam.com\/ar\/product\/sc-upc-fiber-optic-loopback","title":{"rendered":"SC UPC Fiber Optic Loopback Module, Duplex Singlemode"},"content":{"rendered":"
\n

SC UPC Fiber Optic Loopback for Singlemode Optical Port Testing<\/h2>\n

The SC UPC Fiber Optic Loopback is a compact duplex singlemode test accessory designed to route an optical transmit signal back to a receive interface. It combines two blue SC\/UPC connectors in a protective black housing and is intended for compatible SC\/UPC optical test ports.<\/p>\n

Use this module during optical port checks, transceiver troubleshooting and equipment verification. The enclosed loopback keeps the return path compact, making it convenient for bench tests, network maintenance and fault-isolation work. Check the port interface and fiber mode before connecting the device; it is a passive loopback accessory, not a calibrated loss-measurement instrument.<\/p>\n

This SC UPC Fiber Optic Loopback is supplied as a single, fixed SC\/UPC configuration. The two connectors form one return-path assembly; they are not separate patch cords. Match it with singlemode optical hardware that uses SC\/UPC ports, and do not mate the UPC polished interface directly with APC equipment.<\/p>\n\n\n\n\n\n\n\n
\u0646\u0648\u0639 \u0627\u0644\u0645\u0646\u062a\u062c<\/strong><\/td>\nDuplex fiber optic loopback module<\/td>\n\u0645\u0648\u0635\u0644<\/strong><\/td>\n2 \u00d7 SC\/UPC male<\/td>\n<\/tr>\n
\u0648\u0636\u0639 \u0627\u0644\u0623\u0644\u064a\u0627\u0641<\/strong><\/td>\nSinglemode, 9\/125 \u00b5m (OS2-type)<\/td>\nPolish<\/strong><\/td>\nUPC<\/td>\n<\/tr>\n
Connector Color<\/strong><\/td>\n\u0623\u0632\u0631\u0642<\/td>\nHousing<\/strong><\/td>\nBlack molded plastic<\/td>\n<\/tr>\n
Optical Path<\/strong><\/td>\nTransmit-to-receive return loop<\/td>\n\u0641\u0642\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/strong><\/td>\n\u2264 0.3 dB (working specification)<\/td>\n<\/tr>\n
\u0641\u0642\u062f \u0627\u0644\u0627\u0646\u0639\u0643\u0627\u0633<\/strong><\/td>\n\u2265 50 dB (working specification)<\/td>\nTypical Use<\/strong><\/td>\nSC\/UPC port testing and diagnostics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
\"SC\/UPC<\/div>\n
\"SC\/UPC<\/div>\n<\/div>\n

How Fiber Optic Loopback Testing Works<\/h3>\n

A duplex loopback connects a device\u2019s transmit and receive optical paths so that a signal can return to the originating test interface. Technicians use this principle to check port response and narrow down faults during maintenance or equipment validation. Testing behavior depends on the connected transceiver and equipment configuration.<\/p>\n

Select a Compatible Loopback<\/h3>\n

Match the connector family, polish type and fiber mode to the optical port. SC and LC have different connector geometries; UPC and APC polishing are not interchangeable mating interfaces. Choose singlemode or multimode based on the test equipment rather than connector color alone.<\/p>\n

\n
\"Duplex<\/div>\n
\"Fiber<\/div>\n<\/div>\n

\u0646\u0638\u0627\u0645 \u0635\u0627\u0631\u0645 \u0644\u0645\u0631\u0627\u0642\u0628\u0629 \u0627\u0644\u062c\u0648\u062f\u0629<\/strong><\/h3>\n\n\n\n
Consistent stable quality is our core competitiveness for fiber optic products.
\nOur technical team has extensive experience in fiber optic communication.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0634\u0647\u0627\u062f\u0629 \u0627\u0644\u062c\u0648\u062f\u0629<\/h3>\n\n\n\n\n
We control the quality of our products, including our strict qualification of manufacturers,
\nquality control process and production technology,
\nand compliance with certification and safety standards.
\nAt present, our products meet the industry standards
\nand mainstream quality certification, such as ISO 9001, CE, RoHS, FCC, etc.<\/td>\n<\/tr>\n
\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0645\u064a\u0632\u0627\u062a\u0646\u0627<\/h2>\n
\n
\"\u0634\u062d\u0646<\/p>\n

Short Lead Time Fast Delivery<\/p>\n<\/div>\n

\"\u062f\u0639\u0645<\/p>\n

\u0627\u0644\u062f\u0639\u0645 \u0627\u0644\u0641\u0646\u064a \u0644\u0644\u062e\u062f\u0645\u0627\u062a \u0627\u0644\u0645\u0647\u0646\u064a\u0629<\/p>\n<\/div>\n

\"\u0636\u0645\u0627\u0646<\/p>\n

\u0636\u0645\u0627\u0646 \u0627\u0644\u062a\u0633\u0648\u0642 \u0628\u0631\u0627\u062d\u0629 \u0628\u0627\u0644 \u0648\u0628\u0643\u0644 \u0631\u0636\u0627<\/p>\n<\/div>\n

\"\u0643\u0627\u0628\u0644<\/p>\n

\u062c\u0648\u062f\u0629 \u0645\u0645\u062a\u0627\u0632\u0629\u060c \u062b\u0628\u0627\u062a \u0639\u0627\u0644\u064a<\/p>\n<\/div>\n<\/div>\n

<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

SC UPC Fiber Optic Loopback with duplex SC\/UPC connectors and singlemode 9\/125 \u00b5m fiber for optical port testing and diagnostics.<\/p>","protected":false},"featured_media":12832,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[1238],"product_cat":[477],"product_tag":[1839,1840,1841,474,1406],"class_list":["post-12828","product","type-product","status-publish","has-post-thumbnail","product_brand-cablefam","product_cat-loopback-adapter","product_tag-fiber-optic-loopback","product_tag-loopback-module","product_tag-optical-port-testing","product_tag-os2-singlemode-duplex","product_tag-sc-upc-connector","first","instock","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/product\/12828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/comments?post=12828"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/media\/12832"}],"wp:attachment":[{"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/media?parent=12828"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/product_brand?post=12828"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/product_cat?post=12828"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/cablefam.com\/ar\/wp-json\/wp\/v2\/product_tag?post=12828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}