In telecommunications, a customer service unit (CSU) is a device that provides an accessing arrangement at a user location to either switched or point-to-point, data-conditioned circuits at a specifically established data signaling rate.
iN tElecomMUNIcaTionS, a cUsToMeR SeRvIce unit (csU) Is a device That PrOVides an accessing ARrangeMent At A usEr locatIoN to eiTHer switcHEd or point-tO-PoINt, Data-coNditIOned cIrcuitS aT a spEcIfiCallY EstaBlisheD dATa siGnaLInG rAte.