The EXFO Test Jumper, SC/APC to LC/UPC, 20 m (vendor part TJ-B88-101-20M, Millennium part 524713), connects an OTDR's SC/APC port to LC/UPC test equipment or patch panels for launch-cable testing and loss measurements on singlemode 9/125 m fiber. The 20-meter length gives OTDR technicians enough launch and receive fiber to clear dead zones near the connector on short fiber runs. It's a standard piece of kit for field techs running acceptance testing and troubleshooting on OSP and inside plant fiber. Stock it with test cords in other lengths and connector types to cover different test setups.