Electronics / USB Hubs & Docking
User Guide for StarTech.com 127B-USBC-MULTIPORT USB-C Multiport Adapter
Quick-start guide for the StarTech.com 127B-USBC-MULTIPORT USB-C Multiport Adapter. Learn how to connect your HDMI display, USB peripherals, power delivery, and Ethernet network.
Table of contents
Quick Start Guide
This guide provides instructions for setting up the StarTech.com 127B-USBC-MULTIPORT USB-C Multiport Adapter. Before beginning, ensure your host computer has a USB-C port that supports DisplayPort (DP) Alt Mode, as this is required for video output.
Product Overview
The adapter features multiple ports for connectivity:
- Built-in USB-C Host Cable: Connects to your computer. Supports USB 3.2 Gen 1 (5 Gbps) and Power Delivery 3.0.
- HDMI Output Port: Supports HDMI 2.0b HDR10, up to 4K (4096x2160) at 60 Hz via DisplayPort 1.4 DP Alt Mode.
- 3x USB-A Data Ports: For connecting peripherals, supporting USB 3.2 Gen 1 (5 Gbps).
- USB-C Power Delivery Port: Connects a USB-C power adapter (up to 100W).
- Gigabit Ethernet Port: Supports 10/100/1000 Mbps network connections via CAT 5e or CAT 6 cable.
Installation
Follow these steps to connect your devices:
- Host Connection: Connect the built-in USB-C Host Cable to a USB-C port on your host computer. The computer will automatically detect the adapter and install necessary drivers.
- Display Connection: Connect an HDMI-enabled display device to the HDMI Output Port using an HDMI cable.
- Peripheral Connection: Connect USB peripherals to the USB-A Data Ports.
- Power Delivery: Connect a USB-C Power Adapter (up to 100 W) from an AC outlet to the USB-C Power Delivery Port to charge your host computer.
- Network Connection: Connect an RJ-45 terminated network cable (CAT5e or better) to the Gigabit Ethernet Port to access a wired LAN.
Technical Notes
Please note the following operational limitations:
- Video Performance: Resolution and refresh rate depend on the connected host computer's video controller.
- Power Management: The adapter reserves 15 W of power for its own operation. If you connect a 100 W power adapter, up to 85 W will be available for charging your host computer.
- USB-A Power: The USB-A ports will output whatever bus power is available, up to 4.5 W.
Official resources from the manual
Practical help
Common problems
No video output on the connected display
Ensure the host computer's USB-C port supports DP Alt Mode. Video output will not function without this feature.
Host computer is not charging or charging slowly
Ensure you are using a compatible USB-C power adapter. The multiport adapter reserves 15W for itself, so use a power adapter with sufficient wattage to meet your computer's requirements.
Before use
- Verify the host computer has a USB-C port with DP Alt Mode support.
- Ensure you have an HDMI cable for the display.
- Ensure you have a USB-C power adapter (up to 100W) if charging is required.
- Ensure you have a CAT 5e or CAT 6 cable for network connection.
Specs in practice
- Power Delivery
- Supports up to 100W input; reserves 15W for the adapter, passes up to 85W to the host.
- Gigabit Ethernet
- Supports 10/100/1000 Mbps network speeds.
Images and diagrams
- Side A: Contains the built-in USB-C host cable, HDMI port, and 3x USB-A ports.
- Side B: Contains the USB-C Power Delivery port.
- Side C: Contains the Gigabit Ethernet port.
Model compatibility
- Requires a host computer with a DP Alt Mode enabled USB-C port for video output.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.