One type of test only cares about whether the total inferiority of the fiber link meets the requirements, and does not care about the quality of the connection point (connector, melting point, jumper, etc.) that may affect the code rate in the link. Mainly low -speed fiber wiring links (Gigabit and below).

Test of a type of optical fiber wiring system (Tier 1, Basic Fiber Link Test) -The test parameter: loss and length

The optical fiber link acceptance test at the scene is used to using "decline" or "loss" to determine the installation quality of the test link. In most cases, this is a very effective method. In common standards such as ISO11801, TIA568B and GB50312, they tend to use this method called "one type of test" (ie Tier1), characterized by: Test parameters include two indicators of "loss and length", and for testing for testing As a result, "pass/fail" judgment.

One type of test only cares about whether the total inferiority of the fiber link meets the requirements, and does not care about the quality of the connection point (connector, melting point, jumper, etc.) that may affect the code rate in the link. Mainly low -speed fiber wiring links (Gigabit and below). One type of test (Tier1) is often divided into "capable test" and "application test".

General -purpose tests focus on the installation quality of the fiber itself, and usually do not specify the length of the fiber: and the application test is more concerned about whether the currently selected application can be supported by the optical fiber link, usually there are limits of optical fiber link length. Some manufacturers also provide "special types of manufacturers" higher than standards. GM test standards and application test standards often show "incompatible" situations. For example: a 700M long multimodiability optical fiber link, the test decay is 1.2dBM, which meets the requirements of general-purpose test standards, but this link cannot be used to run 1000Base-SX applications in most cases. The reason is only due to the over -harmony (ultra -long, resulting in the cumulative "scattered" accumulation).