Various aspects of apparatuses and methods for enabling a subscriber premise network interface device to facilitate communication services including digitally derived voice services to be facilitated between a central office and a subscriber premise are disclosed herein. A resistance component detecting apparatus includes operational amplifiers, resistors and transistors. A portion of the body is generally flat with a reservoir, which preferably is generally rounded, in a central portion. When inflated, the curtain airbag fixed to a vehicle body along an upper edge and a rear edge of the side window glass in a retracted position deploys into the vehicle interior upon separating and displacing the cover of the rear pillar trim frontward from the other part thereof. Further, the interface downloads a real descriptor stored in the host in response to a download command generated from the host, and secondarily activates the initialization signal and transfers the real descriptor to the host to perform a secondary initialization.