0506:3021 — U.S.Robotics 56000 Voice FaxModem Pro
3Com Corp.
- Vendor ID
- 0506
- Product ID
- 3021
- Combined
- 0506:3021
- Decimal
- 1286:12321
What is this device?
This is the USB identifier for a U.S.Robotics 56000 Voice FaxModem Pro manufactured by 3Com Corp.. The vendor ID 0506 is registered to 3Com Corp. with the USB Implementers Forum, and 3021 is the product ID that 3Com Corp. assigned to this particular model. When you run lsusb on Linux, this device appears as 0506:3021 3Com Corp. U.S.Robotics 56000 Voice FaxModem Pro.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 0506:3021 3Com Corp. U.S.Robotics 56000 Voice FaxModem Pro
You can filter directly with lsusb -d 0506:3021, or get the full descriptor dump with lsusb -v -d 0506:3021. Kernel messages from dmesg show the same pair as idVendor=0506, idProduct=3021.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_0506&PID_3021 USB\VID_0506&PID_3021&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0506&PID_3021"
macOS
$ system_profiler SPUSBDataType
U.S.Robotics 56000 Voice FaxModem Pro:
Product ID: 0x3021
Vendor ID: 0x0506 (3Com Corp.)Driver help
Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.
Raw usb.ids entry
The exact lines this page is generated from, in the upstream source file:
0506 3Com Corp. 3021 U.S.Robotics 56000 Voice FaxModem Pro