ubsa(4) USB support for Belkin serial adapters


To compile this driver into the kernel, place the following lines in your kernel configuration file:
device usb device ucom device ubsa

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:



The driver provides support for the USB-to-RS232 Bridge chip used by a variety of serial adapters from Belkin and other vendors.

The device is accessed through the ucom(4) driver which makes it behave like a tty(4).


The driver supports the following adapters:

  • AnyData ADU-500A EV-DO modem
  • AnyData ADU-E100A (no EV-DO mode support)
  • Belkin F5U103
  • Belkin F5U120
  • e-Tek Labs Kwik232
  • GoHubs GoCOM232
  • Peracom single port serial adapter


The driver appeared in Fx 5.0 . The uplcom(4) manual page was adopted from Nx by An Tom Rhodes Aq [email protected] in April 2002 and modified for the driver by An Alexander Kabaev Aq [email protected] in October 2002.


The driver was written by An Alexander Kabaev Aq [email protected] .