ATEN 2-Port USB 3.0 4K DisplayPort Dual-Display KVMP Switch - Manual (Page 11)

Chapter 1. Introduction
3
Note: 1. Mouse port switching is only supported under mouse emulation
mode with a USB 3-button mouse wheel.
2. Slide the DCC switch to the s position to allow the KVM switch
to receive RS-232 commands via an RJ-45-to-DB9 cable. Please
refer to the CS1942DP_CS1944DP RS-232 Commands
document.
3. HD audio through DisplayPort cannot be switched independently.
4. MST (Multi-Stream Transport) requires either monitors capable
of DisplayPort 1.2 daisy-chaining, or use of a powered
DisplayPort MST Hub. A DisplayPort v1.1a display can be the
last display in a DisplayPort v1.2 chain. The PC source must be
DisplayPort 1.2 compliant.
5. DisplayPort Dual-Mode technology (DP++) does not require an
active adapter for most single display setups. Active DisplayPort
adapters are recommended if you are unsure of the video source's
DP++ compatibility.
6. PC keyboard combinations emulate Mac keyboards. Mac
keyboards only work with their own operating system.