Another kind of tnc is the kiss keep it simple version that omits some or all of the ax. All you need to start in packet radio is a 2 meter fm radio which you probably already have. The packet radio protocols and linux linux ax25appstools the ax. The tnc is like a modem that encodes and decodes packets of data using what is called ax. Rms packet, rms linux gateway software, or other bbs software. This project is about making the arm single board computers come to life for ham radio in a controlled and structured way, so operators can learn the ins and outs of packet radio. Listed under the operating modespacket radio category that is about packet radio operations. The protocol is essentially a tcp link over which the ax. Software for linux dove 7k doveoscar17 telemetry decoding program for linux.
It can be used standalone to observe aprs traffic, as a tracker, digipeater, aprstt gateway, or inter. Furthermore, ax25 is integrated with the rest of the linux networking code and utilities. This project implements a real open source implementation of the ax. Run it on any modern operating system, including linux, macos and windows. The management datalink state machine provides all logic necessary to negotiate operating parameters between two stations. Management data link the management datalink state machine provides for the parameter negotiation of the ax. The general term rms for radio mail server has replaced pmbo for packet or pactor mail box operator. Aprs firenet is an internetbased system using the aprs protocol and much of the same client software to provide fire fighting, earthquake, and weather information in much higher volume and detail than the traditional aprs system is capable of carrying. It is responsible for establishing linklayer connections, transferring data encapsulated in.
Packet radio is an amateur radio technology from the early 1980s that sends data between computers. Ive sent aprs packets with this set up using xastir, but id like to send other information besides just aprs i. Programmer andres has recently been working on creating a toolset for receiving ax. The packet radio protocols and linux linux documentation project. I recommend using direwolf, a popular software tnc which can be run on the same computer hosting the chattervox application. I have a friend that installed and configured the ax. These days, many linux distributions include the modules necessary to support ax. Linux has natively supported the packet radio protocol, more formally known as ax. Linux is the only operating system in the world that offers builtin support for ax.
The program provides an axudp, a kiss and a tcp interface. Dont consider it unless you are a system operator setting up a specialist system, even then linux is a better choice. Right on schedule, canonical has released the latest version of the ubuntu desktop. Windows for the end user is the easiest for installing the tcpip over ax. Joerg reuter dl1bke 19980129moved to netax25, sourcing device drivers. This latest iteration of the ubuntu desktop is an lts long term support release, which means it will be supported until 2025. Pat is a cross platform winlink client written in go. The protocol passed to the socket is used for all outgoing frames. The best place to keep up is to subscribe to the linux hams mailing list. How to configure the linux kernelnetworkingamateur radio. Thats the only time ive heard of having to install ax. The linux operating system is perhaps the only operating system in the world that can boast native and standard support for the ax. Chattervox requires a linux computer and a network or serial connection to a tnc to send and receive ax. If you are already familiar with the process of compiling the linux kernel then you can skip this section, just be sure to select the appropriate options when compiling.
Steps for using soundmodem uz7ho as a packet modem at. There will be an image for each supported board, and a set of shell scripts to help. My packet radio program pe1chl by phil karn ka9q will run ax. Packet radio lives on through open source software. Focal fossa includes plenty of new features that should excite any and all linux and ubuntu fans. The software is available for linux, dos and winnt. There is still a serial port, but the expectation is a program running on the other end of that serial line will perform the necessary ax. The software is new, though, and is changing with some speed.
With it, you can build packet systems using straight ax. Under linux, every device that the kernel uses for networking is assigned a network interface name. Youll also need a radio and a cable to connect the microphone and speaker from the radio to your linux. The authors of this new version took exception to the use of ax. Radio amateur alejandro santos lu4ext is developing extmodem an open source aprs compatible ax.
Typically 300 baud ssb for hf or 1200 baud fm for uhfvhf. Any tnc can also decode aprs packets, once configured just tune to the aprs frequency and watch the data. Howto configure the linux kernel net ax25 amateur radio protocols and ax. It is currently capable of both sending and receive packets at 1200 bps afsk.
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