---
name: "ax25-ports"
section: "4"
platform: "linux"
package: "ax25-util"
version: "0.28.0"
release: "Debian 1.2 (Rex)"
platforms: ["linux"]
url: "https://new.carta.tech/ax25-ports"
---

# ax25-ports(4)

AX.25 port description file.

## NAME

ax25-ports - AX.25 port description file.

## DESCRIPTION

The file **/etc/ax25-ports** defines a mapping between AX.25 packet radio ports and packet radio interfaces.

Each line in the file represents one **port***. The first line is* *port 1, the second is port 2, and so on. Port 1 is the first* *interface that was configured with* [**axattach**(8)](/axattach/8.md) since boot time, port 2 is the second, etc. Thus, the order of the ports in this file and the order of the ports in the shell script that calls [**axattach**(8)](/axattach/8.md) must match.

There are four entries in the file for each port, separated by spaces or tabs. The first is the callsign, with optional extension, to be used on that interface. The second is a Baud rate of the interface. The third is the packet window (an integer between 1 and 7). The fourth is the frequency of the radio connected to that interface.

## EXAMPLE

This example shows two TNCs in use at station AB6YM. The first is a 1200-Baud TNC on 145.75 MHz, the second is a 9600-Baud TNC on 433.43 MHz. A packet window of 7 is used for both interfaces.

```
AB6YM		1200		7		145.75
AB6YM-9		9600		7		433.43
```

## SEE ALSO

**call(1),** **axattach(8)** **axl(8),** **beacon(8),**

## BUGS

## AUTHOR

Alan Cox (GW4PTS@GB7SWN.#45.GBR.EU, A.Cox@swansea.ac.uk)\
 This manual page by Bruce Perens \<Bruce@Pixar.com\>