---
name: "ubser"
section: "4freebsd"
platform: "linux"
package: "freebsd-manpages"
version: "12.2-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ubser/4freebsd"
---

# ubser(4freebsd)

USB support for BWCT console serial adapters

## NAME

**ubser** – USB support for BWCT console serial adapters

## SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:

**device usb** **device ucom** **device ubser**

Alternatively, to load the driver as a module at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
ubser_load="YES"
```

## HARDWARE

The **ubser** driver provides support for the BWCT console management serial adapters.

## FILES

- */dev/ttyU\*.\**

  for callin ports

- */dev/ttyU\*.\*.init*

  - */dev/ttyU\*.\*.lock*

  corresponding callin initial-state and lock-state devices

- */dev/cuaU\*.\**

  for callout ports

- */dev/cuaU\*.\*.init*

  - */dev/cuaU\*.\*.lock*

  corresponding callout initial-state and lock-state devices

## SEE ALSO

[tty(4)](/tty/4.md), [ucom(4)](/ucom/4.md), [usb(4)](/usb/4.md)

## HISTORY

The **ubser** driver appeared in FreeBSD 5.2.