... Board with maxima 16 FXO\FXS); 2. Convert IP to FXO/FXS, the best equipment for IP ... and software technology and carrier-class design to ensure the high reliability of equipment. The ... PSTN in calls; ·Adaptive dynamic buffer technology, to meet the application under bad network; ·G. ... long distance call; ·DTMF detection / generation technology, to effectively support the business of the fax, callback, ...