USB Mode vs OTG/LAN Mode for Phone Farm Box — Connection Guide

This guide explains how Guangzhou Phone Farm boxes support two connection paths and when to choose each for development, testing and device management labs. **Difference** - USB mode (blue LED): devices connect through USB to the control PC, often via powered USB 2.0 hubs. - OTG/LAN mode (green LED): devices share a router segment with the PC; software discovers devices by IP range. **When to choose USB** - First evaluation or small labs (1-2 boxes) - Simpler initial setup without router planning - Teams still validating software on fewer nodes **When to choose OTG/LAN** - 20+ devices on one network segment - Reducing USB host controller load on the PC - Multi-box farms where Ethernet stability matters **PC requirements** - Windows 10/11, adequate RAM (16 GB+ for multi-box USB) - For heavy USB loads: separate controllers or migrate to OTG/LAN - See /manual#recommended-pc for written specs **Router requirements (OTG/LAN)** - Enough DHCP leases for all devices + PC - 50+ devices: dedicated soft router recommended - See /manual#router-network-notes **Common issues** - USB: "insufficient USB resources" -> powered USB 2.0 hub, fewer mirrors, or OTG/LAN - OTG/LAN: scan finds nothing -> same subnet, firewall, green mode, router model **Next steps** - Product catalog: /products - Installation steps: /manual - Send quantity and environment: /contact