1)a 16 E1 signalling gateway; 2)16 digital trunking E1 access; 3)Signalling support:SS7, PRI, Q.SIG, R2, V5.2; 4)CTI ... system for maximum 16 digital trunking E1 access.In the signalling conversion, small-scale applications such as tandem, it's ... through 10 version, NC-AD300D-P16 become getting better and better.and most cost-effective to meet customer demand. Specialty:·Signalling support: SS7,PRI ...