... R2, Q.SIG, V5.2; 4)PBX function; 5)Caller ID display; Description:NC-AD300E PBX is designed by Nice Communication with ... technology with providing E1, FXO, FXS interface.NC-AD300E PBX has its powerful signaling protocol handling and exchanging capability, supporting ... output support throught TCP or UDP*Grouping switching management, have PBX function as below:-Pre-recording voice attendance-Busy, No ...