USB321 – USB 3.1 Gen 1/USB 2.0 Fiber Extender


The new Fresh Digit USB 3.1 Gen1 Fiber Extender is a standalone compliment to our current selection of USB 3.0 extenders. With no drivers needed, our modules can reach up to 300 meters with either single mode or multimode fibers.

*See below for CWDM ordering options


The standalone version of USB321 consists of two individual modules  that directly plug into any compatible system — no programming needed! A PC module directly connects to any USB3.1 Gen1 port on a host such as a PC. A separate RE module (remote module) connects USB3.1 Gen1 to user’s USB3.1 Gen1 devices such as a camera, external hard drive, control panel, or any other USB3.1 Gen1 compatible devices. By placing an optical fiber between the PC and RE modules, the USB321 system can achieve a Fiber Extender 300m link distance with a choice of SM or MM fibers.

Key Features

  • Supports 3 ports of USB3.1 Gen1 (USB3.0) and USB2.0 devices
  • 5 Gb/s transmission bandwidth for up to three USB3/1 Gen1 devices
  • Available for multimode, single mode, or CWDM connections
  • Plug-and-play
  • Provides USB bus power for USB devices
  • Optical isolation
  • Secure power connector and 3 USB connections with locking mechanisms

CWDM Wavelengths

To order or receive pricing information for CWDM wavelengths, please fill out our inquiry form:


Backorder Policy

Fresh Digit maintains a minimum 3 week lead time on all out-of-stock products and will immediately notify customer of any changes in lead time. Thus, customer reserves a three-day grace period to cancel backordered items from the time of purchase. Submit all cancel/refund requests to

Additional information

Input Voltage

10~ 24V DC

Dimensions (LxWxH)

72 x 38 x 22 millimeters
(2.83 x 1.5 x 0.88 inches)

Power Consumption

3.8W, excluding USB bus-powered devices

Operating Temperature (Standard Model)

Case: 0~65°C
Ambient: 0~50°C

USB321 – USB 3.1 Gen1/USB 2.0 Fiber Extender

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