Yeastar K2 and K2 Lite are large capacity pure IP-PBX designed for medium and large enterprises and support respectively up to 2000 users and 1000 users. Engineered for the communications needs of today and tomorrow, Yeastar K2 and K2 Lite deliver rich enterpriselevel features with exceptional reliability, and meet mobile workers’ needs with Linkus UC Softphone. The pure IP telephone system can easily add Yeastar Gateways for FXS, FXO, GSM, WCDMA, ISDN BRI, and E1/T1/PRI ports.