ABSTRACT: This Technical Reference (TR) provides the Telcordia view of generic requirements to build a Portable Test Set (PTS) to support maintenance of Integrated Services Digital Network (ISDN) Basic Rate Access. The document identifies the PTS components, provides an overview of the PTS application, and describes functions of PTS/NT1 (Network Termination) and PTS/TE (Terminal Equipment.)

TR-TSY-000816 replaced TA-TSY-000419.