Built around a powerful 32 Bit ARM processor with fully distributed architecture not only allowing faster processing but also optimum utilization of main CPU time. Compact 8, 16 & 32 Port, fully-featured Line Cards are based on DSP (DUSLIC) design to support features like DTMF generation & detection, Caller ID generation (up to Analogue Extensions), Polarity Reversal, On-hook transmission, Echo cancellation, Message Wait Lamp and Fax/Modem detection. A number of line parameters like battery feeding, impedance matching, hybrid balancing, frequency response, ringer frequency & amplitude, off-hook thresholds, and 12/16 kHz. feeding are programmable making this one of the most flexible designs