... for least cost calls 120 IP users Billing, MOH, IVR, Recording All-in-One SIP IP PABX for SOHO ... useressupport 4 to 96 analog ports (extensions and pstn trunks)up to 120 IP users ... , can be working under NAT for remote IP users by DDNSRecording, Voice mail, ... 8,16,24 FXS local extensions; and 60 IP users in local or remote, support SIP and DDNS, Can be ...