Digital loop carrier solutions for voice and data networks

Lucent Technologies' SLC(R)-2000 digital loop carrier (DLC) system has trad itionally been used to provide telephony services ranging from "plain old t elephone service" (POTS) to digital data systems (DDS) to integrated servic es digital network (ISDN) over T1 and SONET digital facilities. This paper describes how the SLC-2000 Access System has been evolved recently to suppo rt clear channels for lines that traditionally use bit robbing to carry in- band signaling information. This enhancement restores modem performance tha t has degraded due to robbed bit signaling (RBS) and provides subscribers w ith improved data services. The paper also discusses enhancements to the SL C-2000 system to provide subscriber access not only to the circuit-switched telephony network but also to the packet-switched data networks for integr ated voice and data services.