Polarity needs to be determined during the design phase so that the right components can be purchased. Unfortunately, the confusion surrounding polarity often means finding out that you’ve ordered cables or patch cords with the wrong polarity. And since pre-terminated MPO assemblies and jumpers are typically made to order (and often nonreturnable), ordering the wrong polarity risks unexpected project delays and expense. Thankfully, the combination of being able to test for polarity and new MPO connectors that allow you to change polarity in the field is putting an end to the risk. This article takes a closer look.
Sourced through Scoop.it from: www.flukenetworks.com