... 4E1, another is User Board with maxima 16 FXO\FXS); 2. Convert IP to FXO/FXS, the best equipment for IP Call Center;3 ... that other terminals register on it. ·Support any switch among FXO, FXS, SIP; ·Support automatic routing function; ·Support high capacity of black ... call ID; ·Support generation of dial tone, ringback tone, etc.; ·Port supports gain and comfort adjustment of noise; ·Multi-router and ...