Tamura TTC-272N

a count of all of the component leads (or pins)

the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber and is usually expressed in decibels (dB).

Isolation voltage refers to a test of the ability of an insulator to minimize the flow of electric current with a high applied voltage.

In telecommunications, return loss is a measure in relative terms of the power of the signal reflected by a discontinuity in a transmission line or optical fiber.