<CommuniCations, produCt> (DDS) The first private-line digital serviCe offered by AT&T, with data rates typiCally at 2.4, 4.8, 9.6 and 56 kilobits per seCond. DDS is now part of AT&T' s ACCunet family of serviCes. Most LEC (loCal exChange Carriers) and IXC (IntereXChange Carriers) offer similar serviCes. (1995-02-28)