The OM20G IP PBX is an all-in-one IP telephony system. It has built-in FXS/FXO port, provide seamless connectivity to the PSTN, analog terminals, SIP trunks, and SIP terminals, IMS. With VolP technology, the OM20G IP PBX supports free inter-office calls over the Internet or VPN.
 

1	. Come with 2 analog extensions ,2 Co Trunk
2	. SIP Trunk 24
3	. IP Extension 20
4	. Additonal Add on Max FXO is 4  (external gateway)
5	. Additonal Add on Max FXS is 20 (external gateway)
6	. Call Recording/Voicemail (VM)
7	. Interactive Voice Respone (IVR) /Call Detail Record (CDR)