1608:1403 — MultiTech Systems MT4X56 Modem

This is the USB identifier for a MultiTech Systems MT4X56 Modem manufactured by Inside Out Networks [hex]. The vendor ID 1608 is registered to Inside Out Networks [hex] with the USB Implementers Forum, and 1403 is the product ID that Inside Out Networks [hex] assigned to this particular model. When you run lsusb on Linux, this device appears as 1608:1403 Inside Out Networks [hex] MultiTech Systems MT4X56 Modem.

Linux

$ lsusb
Bus 001 Device 004: ID 1608:1403 Inside Out Networks [hex] MultiTech Systems MT4X56 Modem

You can filter directly with lsusb -d 1608:1403, or get the full descriptor dump with lsusb -v -d 1608:1403. Kernel messages from dmesg show the same pair as idVendor=1608, idProduct=1403.

Windows

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

USB\VID_1608&PID_1403
USB\VID_1608&PID_1403&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_1608&PID_1403"

macOS

$ system_profiler SPUSBDataType
    MultiTech Systems MT4X56 Modem:
      Product ID: 0x1403
      Vendor ID: 0x1608  (Inside Out Networks [hex])

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:

1608  Inside Out Networks [hex]
	1403  MultiTech Systems MT4X56 Modem

• 1608:030e Power Management Port
• 1608:030f Watchport/G
• 1608:0310 Watchport/Tc
• 1608:0311 Watchport/Hc
• 1608:1a17 Agilent Technologies (E6473)

See all 76 devices from Inside Out Networks [hex] →