AddPac IPNext IP-PBX System is a next-generation IP-PBX System and a new IP telephony solution for all IP environment, mobile network (GSM, CDMA, 3G), and traditional PSTN network. AddPac IPNext IP-PBX inter-works with various IP terminals of AddPac (e.g. AP-VP300, AP-VP280, AP-VP250, AP-VP150, AP-VP120 IP Video Phones, and AP-IP300, AP-IP230, AP-IP160, AP-IP120, AP-IP90 IP Phones) to provide multimedia IP telephony services as well as the traditional legacy PBX features. These IP-PBX products are based on the advanced embedded RISC that enables firmware upgrade. AddPac IPNext IP-PBX solution is suitable for medium and large size companies, and inter-works with the VoIP and video products of AddPac Technology such as GSM Gateway, Video Conference System to provide a variety of IP application services appropriate for your network. AddPac IPNext IP-PBX System supports H.323 VoIP inter-working as well as SIP protocol for outbound call.