ABSTRACT: This Technical Reference (TR) provides the view of Telcordia on generic physical layer criteria for the Broadband-Integrated Services Digital Network (ISDN) User to Network Interface and Network Node Interface. The document includes details on optical and electrical signal characteristics, synchronization, jitter, connectors, signal format, cell delineation, header error control, scrambling, and operations and maintenance functionality.

TR-NWT-001112 replaces TA-NWT-001112.