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PACKET RADIO – AN OVERVIEW Ø Reasons for Learning Packet Radio Ø Packet Station PACKET RADIO – AN OVERVIEW Ø Reasons for Learning Packet Radio Ø Packet Station Components Ø TNC, Airmail & My Elmers Ø Airmail Software Setup Ø Packet Network Nodes Ø Callsigns, SSIDs, & Node Alias Names Ø Virginia Digital Emergency Network (VDEN)

PACKET RADIO – AN OVERVIEW Ø VDEN stations and Map of locations Ø VDEN PACKET RADIO – AN OVERVIEW Ø VDEN stations and Map of locations Ø VDEN Bulletin Board System (BBS) Ø VDEN Operations – Connection Modes Ø Peer-to-Peer Operations – Connection Modes Ø Local Packet Nets and Stations Ø Not covered: Details of Airmail or Winlink 2000 2

Reasons for Learning Packet Radio • Emergency Management concerns about loosing internet connectivity with Reasons for Learning Packet Radio • Emergency Management concerns about loosing internet connectivity with VA EOC and other EOCs • Packet radio provides essentially error free digital communications via two networks – Virginia Digital Emergency Network (VDEN) – all RF (no connection to internet) – Winlink 2000 (WL 2 K) – Packet may be able to jump over an internet outage to send & receive standard emails via a RMS Gateway station 3

Packet Station Components Kenwood TM-71 VA Dual-band Dell Laptop and Airmail program 4 Packet Station Components Kenwood TM-71 VA Dual-band Dell Laptop and Airmail program 4

TNC, Airmail Program & My Elmers • KPC-3 Plus – A modem, data processor, TNC, Airmail Program & My Elmers • KPC-3 Plus – A modem, data processor, mailbox & digipeter for other stations • translates audio signals into digital & vice versa • performs control & info storage functions • communicates digitally to computer • Software – Airmail ver 3. 4. 062 – free download www. siriuscyber. net/ham • My Elmers – Earl (KR 4 MA) & Lou (KI 4 LWS) 5

Airmail Software Setup* • Menu Driven - may need help - suggest (1) Winlink Airmail Software Setup* • Menu Driven - may need help - suggest (1) Winlink 2000 FAQ (Airmail setup), (2) Airmail Help and/or (3) an Elmer • Setup Wizard – enter call sign, lat & long, TNC, Com Port #, Baud Rate with computer, etc. • Air Mail Options – enter options for Connections, Settings, Folders, Modules (Packet Client, Internet Access), etc. 6

Packet Network Nodes • Nodes (operate on simplex) – – Nodes form the infrastructure Packet Network Nodes • Nodes (operate on simplex) – – Nodes form the infrastructure of a packet network like VDEN Serve as connection points into networks Relay digital communications to extend user range May have multiple ports as well as multiple frequencies • Node Types – Digipeters – first networking scheme; requires end-to-end confirm – KA-Nodes – slight improvement; confirms transmission at each node; user directs each node connection (still dumb but more reliable). Set of commands available in Keyboard Mode. – Net/ROM Nodes - Net/ROMs listen & at interval transmits to other Net/ROMs a list of Net/ROMs it hears. Routing Table developed for automatic routing. No need to direct each node connection (smarter than KA-Node). Set of commands available in Keyboard Mode. 7

Callsigns, SSIDs & Node Alias Names • Callsigns – identify Packet stations • Secondary Callsigns, SSIDs & Node Alias Names • Callsigns – identify Packet stations • Secondary Station Identification (SSID) – Many Packet stations have more than one device using one callsign; SSIDs are used to differentiate (KR 4 MA, KR 4 MA-1, KR 4 MA-2, KR 4 MA-7, etc. , ) – VDEN nodes have a callsign & SSIDs assigned: Net/ROM Nodes use SSID -2, KA-Nodes use SSID -7, and RMS Gateways use SSID 10 • Alias Names – VDEN stations have alias names assigned (HAMPD for W 4 HPT, VAEOC/VDEM for N 4 VEM). Intent to help amateurs remember the various nodes. 8

Virginia Digital Emergency Network (VDEN) • VDEN. org website provides – General Operational Guidelines Virginia Digital Emergency Network (VDEN) • VDEN. org website provides – General Operational Guidelines – Digital Traffic Format Guidelines – Listing of all VDEN packet station alias names, BBS, RMS Gateway stations, their lat & long, and trustee callsigns. – Various maps show VDEN network station locations • Nodes are “connection points” into VDEN - 52 node stations listed on VDEN website. Others added by [email protected] messages • User callsigns must be registered in VDEN for station you connect to – contact Earl Moore KR 4 MA 9

Virginia Digital Emergency Network (VDEN) - continued • Many VDEN stations have more than Virginia Digital Emergency Network (VDEN) - continued • Many VDEN stations have more than one radio port to provide service on multiple frequencies. • Virginia Digital Emergency Network – 145. 730 MHz (1200 baud) primary user frequency – 441. 050 MHz (9600 baud) “high speed” backbone – 446. 075 MHz (1200 baud) “low speed” backbone (also used by HPT for packet shelters/Hampton EOC) • High-speed “backbone” passes large amounts of data without competing with end-users 10

VDEN Stations (Partial Listing) 11 VDEN Stations (Partial Listing) 11

Map of VDEN Stations 12 Map of VDEN Stations 12

VDEN Bulletin Board System (BBS) • A Full Service BBS – is both a VDEN Bulletin Board System (BBS) • A Full Service BBS – is both a message center and information store. Connect to a BBS to – Send & retrieve VDEN messages; provides auto-routing – Read bulletins and announcements (ARRL, ARES, RACES, VDEN, VANET bulletins, etc. ) – Conduct nets/conferences: use “c” command to check-in – Standard commands available in Keyboard Mode such as: • “h” – list of all commands; b, c, d, f, h, I, etc. • “i” – hardware configuration of packet station • “id” - station port #s, with callsign and SSIDs heard, & frequencies • “j”- list of all stations heard by BBS and station ports Note: Use “? ” before each command provides a complete description. 13

VDEN Operations Connection Modes • Handshake Mode – used primarily to – Connect and VDEN Operations Connection Modes • Handshake Mode – used primarily to – Connect and send messages via a BBS for automated routing – Example message address - N 4 [email protected] 4 VEM, KJ 4 [email protected] 4 TJT • Keyboard Mode - used on – BBS: Conduct QSOs, nets/conferencing and obtain info available on BBS using available commands – KA-Nodes and Net/ROM nodes: Obtain station info using available commands and to direct connections to other nodes. 14

Peer-to-Peer Operations - Connection Modes • Two stations connect directly without using network infrastructure Peer-to-Peer Operations - Connection Modes • Two stations connect directly without using network infrastructure (e. g. , KJ 4 TJT to KI 4 LWS) or via an intermediate station • Handshake Mode - send/receive messages (e. g. , HPT shelters messages to/from Hampton EOC) • Keyboard Mode – conduct QSOs/real-time text conversations between two stations 15

Local Packet Nets and Stations • LPEN Net – Hosted by KR 4 MA Local Packet Nets and Stations • LPEN Net – Hosted by KR 4 MA at KR 4 MA-1 BBS station every Tues at 8: 15 PM (local) • VA State Net - hosted by various operators at N 4 VEM BBS station every Weds at 8: 15 PM (local) • Examples of Local Stations (active 24/7) • KR 4 MA – RMS Gateway (York County) • KR 4 MA-1 – BBS (York County), KR 4 MA-2 Net/ROM Node KR 4 MA-7 KA-Node • KE 4 FYV – BBS (LPEN), KR 4 FYV-2 Net/ROM Node, KR 4 FYV-7 KA-Node 16