This interface is suitable for plugging into the J2300C/D Advisor mainframe and the J2900A High Speed undercradle. The J2298B has RJ-48C connectors. These modules handle cell and frame-based technologies, i.e. ATM, Frame Relay, ISDN, HDLC, X.25, PPP, and BERT. These interfaces do not support Frame Relay CIR and SLA measurements.