Greg Kruckewitt, ARRL Sacramento Valley District 3 EC

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Presentation transcript:

Greg Kruckewitt, ARRL Sacramento Valley District 3 EC Packet Radio Greg Kruckewitt, ARRL Sacramento Valley District 3 EC

Topics Introduction What is Packet Radio? Why use Packet Radio? Building a Packet Station Software for Sending Packet Messages Demo

What is Packet Radio? Amateur Packet Radio is one of many digital modes that Hams can use to build wireless computer networks Packet establishes a “private connection” between two stations while sharing a frequency with other stations Packet can use Bulletin Board Systems (BBSs) for dropping off and retrieving messages between users You can take advantage of packet nodes to connect to distant stations

How Packet Radio Works Packet Radio uses the AX.25 protocol Sends packets (an envelope + payload) Envelope contains the header at the beginning and a checksum at end Header contains addressing information (to, from) Checksum determines if packet is error-free Payload contains the data to be sent

Packet – Making Connections…

Advantages of Packet Radio? Messages sent to a BBS can be stored and forwarded throughout connected BBS networks. The recipient does not need to be on-line to get the message, meaning that messages can be retrieved at the recipient's convenience. This can save computer’s battery power.

Advantages of Packet Radio? Packet radio is ideal for sending complex messages passing lists of material, addresses, instructions, or complex words (i.e. pharmaceuticals or chemicals) You would not want to mistake Hydrogen Sulphide (a gas) with Hydrogen Sulfate (an acid) Error checking insures that messages are sent error-free

Complex Data Sent from Tevis Ride

Building a Packet Station To build a packet station you will need: Computer Terminal Node Controller Radio Cables from computer to TNC and from TNC to radio

Packet Radio Software Terminal program RMS Express Outpost Packet Manager

Terminal Program Terminal programs can be used to connect and send short packet messages Many commands to learn Can be used for keyboard to keyboard messaging

RMS Express Designed to be used with exclusively Winlink Email System Cannot be used to connect to a BBS or PBBS Ideal to send email anywhere in the world Can send attachments such as small photos

Outpost Packet Manager Designed for ARES/RACES Emcomms by Jim Oberhofer, KN6PE specifically for ARES/RACES in Santa Clara County. Used by many ARES groups for digital communications in the US.

Outpost: Message List

Outpost: Read Messages

Outpost: Compose a Message

Why Outpost is ideal for ARES Easy to use, e-mail like interface Folders: Inbox, Outbox, Sent, Archive, Draft, Deleted Address book Automates comms with TNC/BBS – just press Send/Receive Auto logging of all messages sent and received Makes printing a message as simple as a click

Packet Radio Demo using Outpost to connect to: Another packet station (peer to peer) Connecting to a BBS Connecting to Winlink to send a packet email message

Resources Contact information Gregory Kruckewitt, KG6SJT kg6sjt@gmail.com cell: 530-219-0611 Outpost Packet Manager http://www.outpostpm.org/ RMS Express & Winlink http://www.winlink.org/ www.sacvalleyares.org Links to this presentation as well as information on packet and many other topics related to ARES.