500 SIP users, 30 concurrent calls
2 FXS, 2 FXO
IP/SIP Failover
Multiple SIP trunks
Fax over IP (T.38 and Pass-through)
Built-in VPN
TLS / SRTP security
Call waiting
Call transfer
Voicemail
Call queqe
Ring group
Paging
Voicemail to Email
Event report
Conference Call