HF Digi Messaging
Emergency Comm
Get Started ALE
ALE Software
HFLINK is the international resource for ALE Automatic Link Establishment High Frequency Communications - HF Digital Messaging - HF Interoperability - Emergency / Disaster Relief - High Frequency Interoperable Communications - Ham Radio


ALE HF Communications
High Frequency Network ALE CHANNEL ZERO

ALE HF Communications
High Frequency Network
HFLINK Group Forum
Propagation Now
Ham Radio ALE
ALE On Air Now
ALE Frequencies Join HFLINK Free Read HFLINK Forum

HF Interoperability Standards and Information Documents Member Supply Depot

Global HF Interoperability Standards Documents

Basis for International Standard HF Interoperability Automatic Link Establishment (ALE)

2G-ALE: MIL-STD 188-141B
USA-DOD Interoperability and Performance Standards for MF and HF Radio Systems. 2nd Generation 2G-ALE is the foundational Global Standard for HF Interoperability Automatic Link Establishment. Basis for FED-STD 1045B.
Download: ALE MIL-STD 188-141B (pdf)

USA Federal Government standard for 2G-ALE, based on MIL-STD 188-141A.
Applicable to all USA Federal Government Agencies for HF Interoperability
Download: ALE Federal Standard 1045A (pdf)

2G-ALE, 3G-ALE: MIL-STD 188-141C
3G-ALE 3rd Generation ALE uses a faster robust modem signal with time-synchronized scanning and channel dwell intervals. Also 3G-ALE refers to the section of STANAG 4538 called FLSU Fast Link Set-Up.

Download: ALE MIL-STD 188-141C (pdf) (4.7MB)

USA Government ALE Handbook Chapter 3

Introduction and Overview of Automatic Link Establishment Systems

Download: ALE Handbook Gov Chapter 3 (pdf)

Basis for Global Standard HF Interoperability HF Modems

Download: MIL-STD 188-110B (pdf)

Interoperability Field Guide (USA)

National Interoperability Field Operations Guide v1.6
US Government Department of Homeland Security
Office of Emergency Communications
Frequencies, standards, and interoperability HF-VHF-UHF-Microwave
Download: NIFOG Field Guide v1.6 (pdf) (May 2015)

The National Interoperability Field Operations Guide (NIFOG) is a technical reference for emergency communications planning and for radio technicians responsible for radios that will be used in disaster response. The NIFOG includes rules and regulations for use of nationwide and other interoperability channels, tables of frequencies and standard channel names, and other reference material, formatted as a pocket-sized guide for radio technicians to carry with them.

National Interoperability Field Operations Guide v1.5
US Government Department of Homeland Security
Office of Emergency Communications 
Frequencies, standards, and interoperability HF-VHF-UHF-Microwave
Download: NIFOG Field Guide v1.5 (pdf) (Jan 2014)

International Amateur Radio ALE Standards
In addition to the global standard ALE protocols, the following documents hereby provide the public documented technical characteristics called for in FCC rules 97.309(a)(4) :

"(4) An amateur station transmitting a RTTY or data emission using a digital code specified in this paragraph may use any technique whose technical characteristics have been documented publicly, such as CLOVER, G-TOR, or PacTOR, for the purpose of facilitating communications."

"Documentation should be adequate to (a) recognize the technique or protocol when observed on the air, (b) determine call signs of stations in communication and read the content of the transmissions."

Amateur Radio Callsign to ALE Address Standard Protocol

International Standard for Amateur Radio Callsign Conversion to ALE Address

Download: Amateur Radio Callsign to ALE Address Standard Protocol (pdf)

ALE Geographic Position Reporting Standard
Geo Position Reporting based on AMD messaging in ALE.
Manual and Automatic, Human and Machine readable GPS locating.
ALE-GPR Geo Position Report Standard v1.1 (html)

Common Alerting Protocol Standards

Standard Common Alerting Protocol (CAP) OASIS

Open non-proprietary standard data interchange format for exchanging all-hazard emergency alerts and public warnings over all kinds of networks.

Download: CAP Common Alerting Protocol v1.2 - 2010 (pdf)

Common Alerting Protocol -
ITU Recommendation X1303 (CAP, Data Networks Open System Communications and Security)

Download: Common Alerting Protocol ITU X1303 date 2007(pdf)

HF Modems and ALE Technology

HF Serial-Tone Waveform Design

by M.B. Jorgenson and K.W. Moreland, Communications Research Centre
Download: HF Modems Explained STANAG (pdf)

Interactions Among Ionospheric Propagation, HF Modems, and Data Protocols
by Eric E. Johnson, New Mexico State University

Download: HF modems Eric Johnson IES02 (pdf)

Analysis of Third-Generation HF ALE technologies
by Eric E. Johnson, New Mexico State University

3G ALE Advantages (pdf)


CCIR 493-4 Selcall
HF SSB Land Mobile Selective Calling protocol commonly used in the Amateur Radio Service (4-digit) and commercial or NGO use (4-digit or 6-digit) in remote areas of the world, such as Australia and Africa, as implemented by Codan, Barrett, QMAC, Micom, Jenal, etc.

Download: UN Open Selcall 6-Digit (pdf)
Open Standard United Nations HF SSB Selective Calling protocol

Spectrum Management

NTIA Redbook - Regulations and Procedure for Federal Radio Frequency Management - U.S. Department of Commerce - National Telecommunications and Information Administration. International Table of Frequency Allocations (combined with USA table), standards for spectrum management, emissions, and other information on USA radio standards.
Download: NTIA Redbook (pdf ~20MB)

More HFLINK News
Join HFLINK Group - Free
Member Store
HF Interoperability
Automatic Link Establishment
Ham Radio ALE Operating
Ham Radio ALE HF Network 
ALE Channel Frequencies
ALE Software & Download
ALE Transceiver Info
ALE Antenna Info
ALE Comm Standards
ALE Technical Info
Ham Radio Bandplans
HF Propagation Now
ALE Geo Position Report
ALE Interoperable HF Comm
Global Emcomm GAREC
JT65A Frequencies
Olivia Frequencies
HF Transceiver Calibration
ALE Ham Radio Nets
PCALE Quick Start Guide
ALE Presentations for clubs and organisations

HF Selcall CCIR 493-4 Australian Type 


Global ALE
High Frequency Network

Super Antenna MP1 SuperStick HF Portable Antenna

Back to Top
Join HFLINK - Free


HFLINK. All Rights Reserved.
HFLINK, HF-LINK, HF LINK, and the HFLINK Logo are trademarks of HFpack Inc. Any external hyperlinks must only be to the main page of the HFLINK.COM website http://hflink.com . Capture of the HFLINK website or any part of it within the frame of another website is not permitted. HFLINK group forum is a private group. Public archiving, forwarding, or open display on the internet of HFLINK group forum or messages is forbidden. HFLINK is a division of HFpack, Inc. All text and images on the HFLINK website are property or copyright HFpack Inc, or when used by permission, are copyright by their respective owners, with all rights reserved. HFN and High Frequency Network are service marks and trademarks of HFpack, Inc. No part of the HFLINK website or HFLINK Group Forum may be used or copied without written permission of HFpack Inc.