| Metric | Value | |--------|-------| | RNDIS link speed | 425 Mbps (theoretical USB 2.0 limit) | | Real throughput | 90–110 Mbps down / 30–40 Mbps up (4G LTE) | | Latency (ping to 8.8.8.8) | 35–55 ms | | CPU usage (idle) | <0.5% (RNDIS interrupt handling) | | Driver stability | 72-hour continuous test – no disconnect |
Document ID: HW-E5573S320-WIN10-2025 Version: 1.0 Target OS: Windows 10 (21H2, 22H2, LTSC 2021) Device: Huawei E5573s-320 (Firmware version: 21.200.xx.xx.xxx) 1. Abstract The Huawei E5573s-320 is a portable LTE router. While primarily used as a Wi-Fi hotspot, it supports USB tethering (RNDIS mode) to provide internet access to a Windows 10 host. Unlike older Huawei modems (E1550, E173), the E5573s-320 does not require a custom NDIS driver or a virtual CD-ROM emulator on Windows 10. Instead, it relies on Microsoft’s built-in Remote NDIS (RNDIS) driver. However, users may encounter driver signature issues, hardware ID mismatch, or device manager errors if Windows fails to switch from "CDC ECM" to "RNDIS" mode. This paper documents the correct driver stack, installation procedure, and common failure resolutions. 2. Device Identification | Property | Value | |----------|-------| | Model | Huawei E5573s-320 | | USB Vendor ID (VID) | 12d1 | | USB Product ID (PID) – Modem mode | 14dc (RNDIS) | | USB Product ID (PID) – Initial/Charge only | 1f01 (CDC ECM) | | Default Windows class | Network adapters | | Required driver | rndismp6.sys (Microsoft RNDIS) | | Driver version (as of Win10 22H2) | 10.0.19041.1 | Note: The device enumerates as HUAWEI Mobile with PID 1f01 when first connected. After 3–5 seconds, the driver stack must automatically switch to PID 14dc (RNDIS). If this switch fails, the device stays in charge-only mode. 3. Driver Architecture on Windows 10 Windows 10 includes native support for RNDIS 6.0. The Huawei E5573s-320 uses standard RNDIS control messages. No Huawei-specific modem.sys or ew_jubusenum.sys drivers are required or recommended. huawei e5573s-320 driver for windows 10