SIP IP PABX Phone system with 4 to 96 FXS/FXO ports SIP trunks for least cost calls 120 IP users Billing, MOH, IVR, Recording

 All-in-One SIP IP PABX for SOHO useres

support  4 to 96 analog ports (extensions and pstn trunks)

up to 120 IP users, can be working under NAT for remote IP users by DDNS

Recording, Voice mail,Music on Hold,Ring group, Auto-Attendant, 3-way-conference;

Embedded SoHo IP PBX phone system with 4,8 or 16 FXO analog ports, and 8,16,24 FXS local extensions; and 60 IP users in local or remote, support SIP and DDNS, Can be working under NAT; based on Linux OS, GUI for management;

The RT20 is an All-in-One converged communication system for small and mid-size offices, home offices and branch offices. It provides the connectivity to not only traditional analog trunks and analog extensions, and but VoIP based SIP trunks and remote extension as well. Using VoIP it allows calls from one location to another over internet or VPN, it allow extensions to be boundled with cell phone, and it also directly integrates with VoIP service provider networks. Depending on configuration when it is purchased, it supports from 8 to 24 local extensions, 60  remote extensions, and 8 to 16 analog trunks. With its flash memory capacity, RT20 also supports built-in IVR, calls records, and downloads for color ring back tones.Application Digram: RT20 Series IP PBX Model list:

Model Name	Analog Extensions	Analog Trunks	SIP users	SIP Trunks
RT20-8O	0	8	60	60
RT20-16O	0	16	60	60
RT20-12S/4	12	4	60	60
RT20-8S/8	8	8	60	60
RT20-16S/8	16	8	60	60
RT20-20S/4	20	4	60	60

 System Features                                                  Built-in SIP Server                                                SIP Trunk                                                                 Auto Attendants                                                      Distinctive Greetings                                                Greeting Mode Scheduling                                       Remote Extensions                                                  Mobile Extensions                                                    Fax Detection                                                           Automatic Route Selection                                                                                                                                                 

IP PABX Phone System