# PSRT - industrial Pub/Sub for WAN ## What is PSRT PSRT is a pub/sub real-time telemetry protocol, optimized for industrial needs: providing low latency, dealing with slow channels and large payloads. PSRT can process 100K+ messages on a single node with very low latencies (<1ms). Speeds are reasonable (1K+ ops/sec) even with enormous (1MB+) payloads. Topic subscriptions in PSRT are processed with B-tree algorithms, which allows the server to handle hundred thousands subscriptions without any speed loss. ## Technical documentation ## About the authors [Bohemia Automation](https://www.bohemia-automation.com) / [Altertech](https://www.altertech.com) is a group of companies with 15+ years of experience in the enterprise automation and industrial IoT. Our setups include power plants, factories and urban infrastructure. Largest of them have 1M+ sensors and controlled devices and the bar raises higher and higher every day.