The Yeastar S100 VoIP PBX Phone System is a powerhouse telephony solution designed for growing office environments and multi-location setups. With support for up to 100 users and 30 simultaneous calls, the S100 delivers enterprise-grade call handling, unified messaging, and collaboration tools. Its modular architecture allows for up to six interface modules—FXS, FXO, GSM/3G/4G, or BRI—letting businesses tailor connectivity to their needs. Featuring a modern web-based interface and full auto-provisioning for popular IP phones, the S100 offers seamless configuration, management, and scalability.

Key Features:

• Up to 100 users & 30 concurrent SIP/IAX2 calls for high-capacity communication

• Six expansion module slots supporting FXS, FXO, BRI, and cellular connections

• Comprehensive PBX functions: IVR, voicemail, conferencing, call queuing, ring groups, call recording

• Auto-provisioning for major IP phone brands and centralized firmware management

• Web-based graphical interface with real-time monitoring and backup/restore options

• Rack-mount or desktop installation with fan-less, energy-efficient design

• Advanced security features including TLS/SRTP, IP blacklisting, and phishing protection