1. Victor Poor, W5SMM Rick Muething, KN6KB
Telpac
Paclink
DCC 2003
Telpac and Paclink… Streamlined AX.25 Packet Radio Server and Client for a Full Service Ham Radio Messaging Network
Victor Poor, W5SMM
Rick Muething, KN6KB

2. Introduction and Overview
Telpac
Paclink
Introduction and Overview
DCC 2003
Background on Winlink 2000 (WL2K)
Motivation for Telpac and Paclink
Development Approach
Telpac ….The TELnet - PACket bridge for WL2K
Simple setup examples
Paclink …. A Radio client for
Configuration and operation examples
Using the AGW Packet Engine
Applications
Summary/Questions
Demo of Paclink and Telpac (time permitting)

3. Winlink 2000 System Telpac Paclink What is WL2K?
DCC 2003
Introduced in 2000 (DCC 2000) WL2K is a modern software implementation of a Global ham message system capable of conventional BBS functions with significant extensions for the Mobile user.
Biased toward the mobile user.
Conventional BBS functions with routing and store and forward for radio and messages.
No “Home BBS” designation required (global message mirroring)
Optimized to capitalize on Internet forwarding when possible
On demand WX products and other Web information.
with text/compressed binary attachments
Position reporting and request from radio and Internet
Currently 4300 Users (HF Pactor, Packet, Telnet, Web) delivering over 150,000 messages per month by 36 PMBOs.

4. Winlink 2000 System Telpac Paclink Paclink Internet Telpac node Radio
DCC 2003
WL2K Central Server (CMBO)
Internet
Telnet
Telnet
Telpac
node
WL2K PMBO
WL2K PMBO
(Telnet Server)
Radio
(Pactor 1-3, AX.25 packet)
AX.25 Packet
NPMBO BBS
Paclink
USERS
AirMail
BBS Programs
Keyboard Terminals
User Client

5. Motivation for Telpac and Paclink
DCC 2003
WL2K has been very well accepted by the mobile HF community
Many requests to expand local WL2K coverage (VHF/UHF)
Emergency communications
Small portable terminals
Two obstacles for widespread VHF/UHF expansion:
The standard PBMO setup requires a considerable
computer, radio equipment and synchronized data base.
Telpac provides a simple Telnet to Packet bridge
The user client program has to work with most available
TNCs and interface with existing clients.
Paclink provides a user client that meets these objectives

6. Development Approach Telpac Paclink
DCC 2003
Leverage existing standardized interfaces & protocols:
Existing WL2K Telnet Servers via Internet/Telnet
Standard TCP communication between components
Standard mail format and server protocols:
MIME message storage
POP3 and SMTP servers
Capture TNC drivers using a standardized TCP interface
AGW Packet Engine
Use modern development environment and tools for improved
productivity and reduced support
Telpac: VB6, Paclink: VB.NET

7. Telnet <> Packet Bridge
Telpac
Paclink
Telpac…WL2K’s
Telnet <> Packet Bridge
DCC 2003
Key Features:
Easy set up
No local database
Multiple active connections
Supports all WL2K functions
AGW Packet Engine support

8. Telpac… 15 Minute Setup…Step 1
Paclink
Telpac…
15 Minute Setup…Step 1
DCC 2003
Install the AGW Packet Engine…
These 2 menus setup the TNC

9. Telpac… 15 Minute Setup…Step 2
Paclink
Telpac…
15 Minute Setup…Step 2
DCC 2003
Install Telpac…
These 2 menus set up
the Telpac bridge.
Customize your log-on
banner and beacon...
You’re a WL2K
Telpac node!

10. Paclink… A Windows Radio E-mail Client
Telpac
Paclink
Paclink… A Windows
Radio Client
DCC 2003
Key features:
WL2K, FBB or MBL BBSs
user interface
Mixed radio/
Packet Engine support

11. One-to-One E-mail Account to Paclink Channel Concept
Telpac
Paclink
One-to-One Account to Paclink Channel Concept
DCC 2003
Each account on the client (e.g. Outlook)
handles traffic for one Paclink channel
client
accounts
Paclink channel setup
Paclink ports setup
[AGWPE 1] [ W4MLB via COA1 ] [KN6KB] [MLB_BBS/****]
POP3
SMTP
Mail Acct:
MLB_BBS
PACTOR
[AGWPE 3] [ N0IA-1] [KN6KB-1] [BUD_DIRECT/******]
POP3
SMTP
Mail Acct:
BUD_DIRECT
PACKET 1
AGW
ENGINE 3
[PACTOR] [ N8PGR ] [W5SMM] [ WL2K_PACTOR/*****]
POP3
SMTP
Mail Acct:
WL2K_PACTOR
TELNET
POP3
SMTP
Mail Acct:
WL2K_TELNET
[TELNET] [ K4CJX Telnet ] [KN6KB-1] [WL2K_TELNET/****]

12. Paclink Channel Setup Telpac Paclink
DCC 2003
Name and password match client
Each Paclink channel
corresponds to one
client account
Channel Properties Port Properties

13. Paclink’s User Interfaces
Telpac
Paclink
DCC 2003
Paclink’s own simple
terminal window for
keyboard interfaces
Your favorite
client for normal BBS
messages.

14. with Telpac and Paclink
The AGW Packet Engine
with Telpac and Paclink
DCC 2003
By George Rossopoulos, SV2AGW
Standardized TCP interface supports most
TNCs Using KISS mode.
Supports sound card TNCs (1200 & 9600 baud)
Shares TNCs across applications
Paclink, Telpac, BBS, APRS, Terminal, Monitor
Allows remote operation via TCP link
TNC’s may be separated from application
TCPIP
AGW Packet
Engine …
Sound
Card
TNC
TNC

15. Telpac and Paclink Applications
DCC 2003
Telpac as a conventional BBS for “Last Mile” wireless connectivity
Paclink as an end user client for BBS access (WL2K, FBB etc)
Paclink as the an emergency radio link for Internet
Paclink provides the radio connection to a WL2K Telpac node
Emergency field operators use their existing client
but with a “radio” account instead of default account
Multiple operators can share a single Paclink and its TNCs/radios
Paclink <> Paclink transfers (keyboard or via clients)

16. Demo (time permitting or in the demo room)
Telpac
Paclink
Demo
(time permitting
or in the demo room)
DCC 2003
1) Connection to a WL2K Telpac node:
Send request via for a text WX report
Outlook Express > Paclink (local TCP)
Paclink > Telpac node (AX.25 packet)
Telpac node > WL2K Telnet server (Internet Telnet)
Telnet Server > WL2K Bulletin Processor
…..and return….
2) Paclink to Paclink (keyboard and message via Outlook Express)

17. Pick up a Telpac/Paclink CD!
Summary/Questions
DCC 2003
Telpac and Paclink are examples of rapidly developed
modern Ham software that leverage standard protocols
and existing user and TNC interfaces.
Simplified setup and minimal equipment requirements mean
expanding the wireless infrastructure can be done quickly
with minimum expense.
Your feedback and comments are appreciated to help us expand
these programs to new applications.
Pick up a Telpac/Paclink CD!
Thank you!