Hi,
Sorry for the late reply. TSW100 has been designed for type B standard. Most of the devices are designed to support both A and B standards as you're not always sure with what PSE (Power sourcing equipment) are you going to power them, so that is done for safety purposes. So if you weren't lucky with type A, now you definitely know that the TSW100 is type B PSE that powers over spare pairs.
EB.