3×1 BYOM Switcher with Wireless Presentation - Tight AV SI-S311

High-performance presentation switcher with wired and wireless BYOM features

Overview
The SI-S311 is a versatile 3×1 presentation switcher that supports both wired inputs (HDMI and USB-C) and wireless presentation capabilities. It enables Bring-Your-Own-Meeting (BYOM) workflows, Ethernet passthrough, and support for Miracast, AirPlay, Chromecast or optional dongles.

Description
This switcher accepts wired video input via HDMI or USB-C (DisplayPort Alt Mode), supporting resolutions up to 4K @ 60 Hz. It allows connected USB devices on the meeting table to be shared via a USB Host port, with automatic or manual host switching. A built-in Gigabit Ethernet passthrough offers network access to the connected host without relying on Wi-Fi. Wireless presentation modes support Miracast, AirPlay, Chromecast, SiMA App and optional dongles. The unit also provides reverse control and on-screen annotation overlay, allowing users to control connected devices from a touch display, keyboard, or mouse. Configuration and control are available through a Web UI, and an open API supports integration into external control systems. The switcher is suitable for under-table mounting and features a fanless design for quiet operation.

Key Features
Supports 3×1 switching between HDMI, USB-C, and wireless inputs
4K @ 60 Hz support for both HDMI and USB-C wired inputs
BYOM functionality allowing USB device sharing (wired + wireless)
Gigabit Ethernet passthrough over USB to host
Wireless presentation via Miracast, AirPlay, Chromecast, SiMA Dongles
Reverse control and annotation from touch displays or external input devices
Web UI and open API for configuration and control
Fanless, quiet design suitable for meeting rooms

Technical Specifications

Model: SI-S311
Video Inputs: 1 × HDMI 2.0b, 1 × USB-C (DP Alt Mode), 1 × Wireless presentation
Video Output: 1 × HDMI 2.0b
Input Resolution (HDMI / USB-C): up to 4K @ 60 Hz (4:4:4)
Wireless Presentation: Miracast, AirPlay, Chromecast, SiMA App/Dongles
HDCP: HDCP 2.x / 1.x
Audio Output: Balanced line audio 5-pin terminal block
Audio Response: 20 Hz – 20 kHz (±3 dB)
THD+N: < 0.05% (20 Hz – 20 kHz)
USB Host / Device: 1 × USB-C (USB 3.2 Gen1), 1 × USB-B (USB 3.2 Gen1)
USB Devices Ports: 3 × USB-A (USB 3.2 Gen1), 1 × USB-C
USB Device Power: Shared up to 20 W
Control Interfaces: RS232 (3-pin Phoenix), TCP/IP (RJ45)
Network: 1 × RJ45 (10/100/1000Base-T)
Security: IEEE 802.1x, HTTPS, TLS, PEAP / TTLS
Wireless: 802.11n/ac dual band (2.4 / 5 GHz)
Operating Temperature: 0 °C to 40 °C
Storage Temperature: –20 °C to +60 °C
Humidity: 0–85% non-condensing
Power Supply: 24 V DC, 6 A
Max Power Consumption: 130 W (fully loaded)
Standby Consumption: ~5.95 W
USB-C Power Delivery: Up to 100 W PD 3.0
Dimensions (with antennas): 215 × 194 × 28 mm
Weight (with antennas): 750 g
Compliance: FCC, CE-RED, RoHS, WEEE
Warranty: 5 years limited warranty; 6-month advance replacement

Typical Applications
Meeting rooms, classrooms, boardrooms where flexible presentation from wired or wireless sources is required
Hybrid meeting setups enabling users to bring their own device with minimal cabling
Spaces requiring control integration, annotation and device control from displays