---
name: "baycomusb"
section: "8"
platform: "linux"
package: "baycomusb"
version: "0.10-15"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/baycomusb"
---

# baycomusb(8)

Baycom USB modem diagnostics utility

## NAME

baycomusb - Baycom USB modem diagnostics utility

## SYNOPSIS

**baycomusb** **\[ -sv \]** **\[-D usbdevfsmountdir\]** **\[-C configfilepath\]** **\[-d busnr:devnr\]** **\[-i index\]** **\[-I ifname\]** **\[-t testname\]** **\[--drv=usbdevfsmountdir\]** **\[--config=configfilepath\]** **\[--device=busnr:devnr\]** **\[--index=index\]** **\[--ifname=ifname\]** **\[--test=testname\]**

## DESCRIPTION

**baycomusb** is a user mode driver for the Baycom EPP modem family. It currently supports the conventional EPP modem (using the IDT 72xxx FIFO's) and the FPGA (Xilinx XCS10) variant. The driver automatically initializes the FPGA modem depending on the requested mode. In order to keep the resident memory footprint small (approx 20kBytes plus standard system shared libraries like libc), the initialization code is contained in a shared library called *baycomfpga\_init.so .* This driver is able to automatically attach itself to the kernel network stack as a network interface (usually called ax0). To do this it requires the Linux Kernel MKISS driver (enable CONFIG\_MKISS).

## OPTIONS

**baycomusb** accepts the following options:

- **-h**

  **--help** Display an overview of the available command line parameters and exit.

- **-v**

  **--verbose** Increases the verbosity of the output. May be cumulated.

- **-D**

  **--drv** Specifies the mount directory of the USB device filesystem. The default is /proc/bus/usb

- **-C**

  **--config** Specifies the config file. The default is /etc/ax25/baycomusb.xml.

- **-d**

  **--device** Specifies the device by bus number and device number.

- **-i**

  **--index** Specifies the device by a number.

- **-I**

  **--ifname** The name of the AX.25 network interface when performing final setup (to be used by the kernel driver).

- **-t**

  **--test** Specifies the test to be performed.

## SEE ALSO

```
ifconfig (8), sethdlc (8),
```

## AUTHOR

baycomusb was written by Thomas Sailer, HB9JNX/AE4WA (sailer@ife.ee.ethz.ch).