Feature Highlights OTX board PCMCIA card 2 ISDN Basic Rate S/T-interfaces. Three operation modes: Terminal (TE), Exchange (NT), and Monitor. Full simulation (terminal or exchange) of 2 accesses and monitoring of 1 access. Supplied with two dongles (one for each S/T interface) Two on-board Digital Signal Processors (DSPs) TMS54C548 with 80 MIPS processing power each. Standard DSP firmware supplied with OTX driver DSP Software Development kit for customized DSP applications