Features:

System
● Powerful service capability
● Perfect integrated equipment access capability
● Powerful network interworking capability
● Perfect scalability
● Perfect manageability and operability
● High reliability, Security

Service functions
● Basic voice service
● VOP voice service
● Supplementary services
● Color ring service
● Conference service

Supported Standards
● TCP/UDP/IP
● RTP/RTCP
● HTTP
● ARP/RARP
● MD5
● ICMP
● DNS
● SNTP
● TFTP
● RFC 3261, RFC 3311, RFC 3515, RFC 3265, RFC 3892, RFC 3361,RFC 3842, RFC 3389, RFC 3489, RFC 3428, RFC 2327, RFC 2833,RFC 2976, RFC 3263, RFC 3264

SIP Registrar
● Static registration
● Configurable expiry time
● MD5 authentication
● Registration proxy to external registrars
● Configurable PBX Caller ID
● User profile
● Handle loose RFC-compliant phones
● Resilient message retry mechanism
● Seeding historical registrations

SIP Proxy
● Powerful proxy server
● Call-based MD5 authentication
● NAT traversal for clients

PBX Features
● Support call hold, call waiting, 3-way call conference
● Built-in in-line call transfer
● Unconditional, unavailable, busy call forward
● Per-calling-number forward and rejection
● Auto-attendant
● Voice mail system (Pending)
● In-band/RFC2833/SIP-INFO DTMF translation
● Support 3 SIP trunks
● ITSPs account sharing for extensions
● Interoperable with Cisco Call Manager, CCME, IOS SIP gateway, Unity, CUE, 79XX, ATA
● Music on hold
● Direct line
● Outbound 900/0204 blocking

Auto Attendant
● Configurable Greetings
● Key to reach operator
● Timeout interval and timeout action
● Music on ringing extensions
● Forward to voice mail on no-answer

Conference
● Configurable number & PIN
● Up to 10 parties per conference
● Music on first dial-in party

NAT
● Auto NAT discovery and traversal
● Built-in STUN client
● Built-in UPNP
● RTP proxy
● RTP port range designation

Relational Provision
● Logical partition/relation on users and trunks
● Logical provision on outgoing and incoming calling search scopes
● Rich dial-plan expressiveness thru route patterns
● Object-oriented provisioning paradigm

Administration
● Web-based configuration
● Extension status display
● TFTP server and TFTP repository maintenance
● Network Time Protocol time synchronization
● Real Time Clock setting
● DHCP server; per-MAC IP binding, list of options
● Configurable time zone
● Firmware upgrade through Web interface

Network Management
● Static IP on WAN
● LAN IP and net mask specification
● Fire walling on predefined services
● DNS and dynamic DNS

Routing Features
● IP trunking supports multiple connects
● Least cost routing
● FXO trunks

Maximum Capacity
● Up to 50 extension registrations
● Up to 50 FXO registrations
● Up to 50 Sip Trunk registrations
● Up to 50 concurrent calls with RTP

Specifications: