Which OLTS testing method is known to simulate the loss of two mated pairs in an optical fiber link?

The two jumper method is particularly effective in simulating the loss of two mated pairs in an optical fiber link. This method involves the use of two jumpers to create a loop within the testing setup. By doing so, it allows technicians to assess the total loss that would occur when two connections are involved in the optical link.

When using the two jumper method, the insertion loss from both jumpers can be measured, which realistically mimics the conditions of a live fiber installation that includes two mated pairs. This simulation is crucial during testing, as it helps ensure that the performance of the optical network will meet required specifications, and that technicians can detect issues such as excess loss or faulty connections that might occur in real-world scenarios.

Other methods like one jumper or three jumper methods do not adequately simulate this specific condition, and the loopback method, while useful for testing purposes, does not focus specifically on the loss characteristics introduced by multiple mated pairs. Thus, the two jumper method stands out as the most suitable choice for this particular testing requirement.