The Ultraframer provides a versatile interface for DS1/J1/E1, DS3/E3, DS2/E2, and DS0/J0/E0 applications. The Ultraframer device integrates M13/E13 multiplex/demultiplex functions and the primary rate framing function.

Each interface consists of a fully integrated, full featured, primary rate framer with HDLC formatter for facility data link access. It also provides alarm reporting and bidirectional performance monitoring. The TFRA84J13 provides glueless interconnection to analog line interface units and time-slot interchangers.