6891:a727 — 3CRUSB10075 802.11bg [ZyDAS ZD1211]
3Com
- Vendor ID
- 6891
- Product ID
- a727
- Combined
- 6891:a727
- Decimal
- 26769:42791
What is this device?
This is the USB identifier for a 3CRUSB10075 802.11bg [ZyDAS ZD1211] manufactured by 3Com. The vendor ID 6891 is registered to 3Com with the USB Implementers Forum, and a727 is the product ID that 3Com assigned to this particular model. When you run lsusb on Linux, this device appears as 6891:a727 3Com 3CRUSB10075 802.11bg [ZyDAS ZD1211].
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 6891:a727 3Com 3CRUSB10075 802.11bg [ZyDAS ZD1211]
You can filter directly with lsusb -d 6891:a727, or get the full descriptor dump with lsusb -v -d 6891:a727. Kernel messages from dmesg show the same pair as idVendor=6891, idProduct=a727.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_6891&PID_A727 USB\VID_6891&PID_A727&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_6891&PID_A727"
macOS
$ system_profiler SPUSBDataType
3CRUSB10075 802.11bg [ZyDAS ZD1211]:
Product ID: 0xa727
Vendor ID: 0x6891 (3Com)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:
6891 3Com a727 3CRUSB10075 802.11bg [ZyDAS ZD1211]