* 1 Stage / 2 Stage Dial; Call Balance Alarm; Call Back; Call Detail Record (CDR); Call Duration Limitation; Call Progress Tone Generation; Call Status Display; Call Transfer; Call Waiting; Caller ID / CLIR.

* Carrier Selection (Auto / Manual); Incoming / Outgoing Routing Rules; SIP Trunk Support; SIP Peer Mode Support; SIP Response Code Switch; VoIP Trunk Group; Switch SIP Server for IP Phones.

* IP Blacklist; White List / Black List; Network Attack Alert; PIN Modify.

* SMS Sending & Receiving; Send Bulk SMS; SMS Center; USSD Support; Open API for SMS & USSD.

* Web-Based Configuration; Group Management; Hotline Configuration; Gain Adjustment; Configure Backup / Restore; Firmware Upgrade (via HTTP / TFTP); Real Open API Protocol (Based on Asterisk); System Logs; Session Timer; NTP (Time Sync); Packet Capture.