MIL-STD-187-721 Interoperability And Performance Standard For Advanced Adaptive Hf RadioThe purpose of this document is to describe the technical parameters for adaptive high frequency HF radio that are more advanced than those described in MIL-STD-188-141. The advanced technology contained in this standard will guide the planning of military adaptive HF radio network technology into the 21st century. To fully understand and utilize this document, it is necessary to refer to portions of MIL-STD-188-141.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57 - 58 - 59 - 60 - 61 - 62 - 63 - 64 - 65 - 66 - 67

MIL-STD-187-721D

2.4  Order of precedence.

In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence.  Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3.  DEFINITIONS

3.1  Terms.

Definitions of terms used in this document are in accordance with the current edition of FED- STD-1037.  In addition, the following definitions are applicable for the purposes of this standard.

Any-media - A network capable of routing traffic over a variety of physical media, and of dynamically adapting to the acquisition and loss of entire subnetworks.

Multiple media - Transmission media using more than one type of transmission path

(e.g. optical fiber, radio, and copper wire) to deliver information.

Trap - An unsolicited message from a logical element to a management station that announces the occurrence of an exceptional event.

3.2  Abbreviations and acronyms.

Abn                                         Airborne

ACK                                       acknowledgment

ADC                                       available data capacity

AI                                           articulation index

ALE                                        automatic link establishment ALM                                       automatic link maintenance ALQA                                    automatic link quality analysis AME                                      automatic message exchange ARQ                                       automatic repeat-request

ASCII                                     American Standard Code for Information Interchange

AVQ                                       achievable voice quality

BCD                                       binary coded decimal

BER                                        bit error ratio b/s                                           bits per second

CMD                                      ALE preamble word COMMAND CQM                                      channel quality measure

DATA                                    ALE preamble word DATA

3