ABSTRACT
Atthetelco'sCO,userdatapacketssentacrosstheDchannellinkarestrippedoffby packethandlersplacedinfrontoftheISDNswitch;thedatapacketsarethensentacrossan X.25networktotheirfinaldestination.
OnefrequentlycitedapplicationforAO/DIisInternetaccess.PacketsridetheDchannel tothetelco'sCO,andarethenputontotheX.25packetnetworktobeforwardedtotheISP. TheISP,inturn,routesthepacketstotheInternet.
