Yeastar S-Series IP phone systems are easy to use and install, flexible and feature-rich while still delivering quality and reliable product at exceptional cost savings. The S-series IP-PBX are designed with the small and medium sized enterprises in mind, supporting up to 500 users and built using the very latest technology. Small businesses, home offices and mid-sized businesses will all find a model that fit the business needs.
With Yeastar S-Series, all the telephony interfaces are modular and customizable, whether it’s FXS, FXO, ISDN BRI, GSM/3G, or E1/T1/PRI. S20 has 2 onboard module slots and S50 supports 4. S100 and S300 require the combination of Expansion Board and Telephony Modules to add telephony interfaces. S100 allows 2 Expansion Boards and S300 supports 3.