The amount of loss applied between any two endpoints on a call is administrable. However, the Telecommunications Industry Association (TIA) has published standards for the levels that IP endpoints must use. The IP endpoints always send and receive audio at TIA standard levels. IP audio signals are sent or received over the TDM bus through a G4xx Media Gateway or Avaya Aura® Media Server. For these IP audio signals, the Media Module adjusts the levels to approximately match the levels of a signal to or from a DCP set. By default, IP endpoints are the same loss group as DCP sets, Group 2.