ENQUIRY Key Features Supports up to 500 SIP users and 50 concurrent calls Supports 2 FXS and 2 FXO interfaces Expandable with 2S/2O/1S1O modules, supporting up to 3 modules Flexible dial rules based on time, number or source IP etc. Supports Multi-level IVR(Interactive Voice Response) Support voicemail/ Voice recording User-friendly web interface, classification of web user’s rights