S, 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' SAccunet family of ServiceS. MoSt LEC (local exchange carrierS) and IXC (IntereXchange CarrierS) offer Similar ServiceS. (1995-02-28)