Yeastar P520 P-Series PBX for up to 20 Users and 10 Concurrent Calls

The Yeastar P520 is an IP-PBX from the P-Series platform, designed for small businesses requiring a unified communications system supporting up to 20 users and 10 concurrent calls. The system consolidates analog, ISDN BRI, and cellular GSM connectivity into a single telephony platform, addressing office environments where mixed legacy and modern infrastructure coexist. Its compact form factor and multi-port support make it a practical PBX solution for small teams with diverse line requirements.

The P520 accommodates up to 4 analog FXS/FXO ports, 4 BRI ports for ISDN lines, and 1 cellular port for direct GSM connectivity — eliminating the need for separate gateway hardware. External TF card storage enables local call recording and configuration backup. The P-Series platform delivers full UC functionality including IVR, call queues, conferencing, voicemail, and CDR reporting.

The system integrates with SIP trunks for capacity expansion through VoIP carriers while maintaining support for existing analog and ISDN lines. Administration is handled through a web-based interface covering user management, routing policies, and real-time monitoring. P520 is compatible with Yeastar desktop and mobile client applications, extending UC features to remote and hybrid workers.

The P520 targets small businesses with up to 20 staff operating in offices with mixed telephony infrastructure — analog, ISDN, and GSM. Typical deployments include administrative offices, agencies, and branch locations requiring a cost-efficient IP-PBX without exclusive dependence on SIP trunking.