The ZYCOO Coovox U50 IP PBX is an ideal solution for small and medium business with up to 100 extensions. Adopting the innovative modular design, it is very convenient to increase telephony ports to expand the system. CooVox-U50 supports industry standard SIP trunks, analog PSTN trunks (FXO Module), analog stations (FXS Module), and mobile GSM/WCDMA trunks (GSM/WCDMA Module). CooVox-U50 is a next-generation Hybrid IP PBX System designed and optimized for today’s business telecommunication needs.