TFLC-1 OTDR test extension cable, also known as fake fiber box, is used to make up for the blind area of OTDR test. The whole optical fiber has no fusion splice points. Both end of connectors at are terminated by glue injection and grinding processes. There are two types of single-mode and multi-mode. A variety of options, small size, light weight, easy to carry, typical loss of 0.35dB/km (SM G652), with excellent sealing performance, waterproof, pollution-proof and explosion-proof characteristics. SC/FC/LC connector and UPC and APC connector modes can be selected.