047e:bad1 — Lucent 56k Modem

This is the USB identifier for a Lucent 56k Modem manufactured by Agere Systems, Inc. (Lucent). The vendor ID 047e is registered to Agere Systems, Inc. (Lucent) with the USB Implementers Forum, and bad1 is the product ID that Agere Systems, Inc. (Lucent) assigned to this particular model. When you run lsusb on Linux, this device appears as 047e:bad1 Agere Systems, Inc. (Lucent) Lucent 56k Modem.

Linux

$ lsusb
Bus 001 Device 004: ID 047e:bad1 Agere Systems, Inc. (Lucent) Lucent 56k Modem

You can filter directly with lsusb -d 047e:bad1, or get the full descriptor dump with lsusb -v -d 047e:bad1. Kernel messages from dmesg show the same pair as idVendor=047e, idProduct=bad1.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_047E&PID_BAD1
USB\VID_047E&PID_BAD1&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_047E&PID_BAD1"

macOS

$ system_profiler SPUSBDataType
    Lucent 56k Modem:
      Product ID: 0xbad1
      Vendor ID: 0x047e  (Agere Systems, Inc. (Lucent))

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.

The exact lines this page is generated from, in the upstream source file:

047e  Agere Systems, Inc. (Lucent)
	bad1  Lucent 56k Modem

• 047e:0300 ORiNOCO Card
• 047e:1001 USS720 Parallel Port
• 047e:2892 Systems Soft Modem
• 047e:f101 Atlas Modem

See all 5 devices from Agere Systems, Inc. (Lucent) →