ASTi Telestra User's Guide download pdf (Page 143)

ASTi Telestra User Guide (Ver. 3, Rev. G.1)

Appendix B: ALE Server ICD

Introduction

This appendix provides the speciﬁcation for the software interface between the ALE Server and

the host computer. The ALE Server is provided with certain conﬁguration data, on a per Exercise

basis, via an Ethernet packet. The host software provides the input data to the ALE Server in the

format speciﬁed in this ICD.

Data is provided to the ALE Server via an Ethernet connection between the host computer and the

ALE Server. This connection does not need to be dedicated but may be part of the Local Area Net-

work infrastructure. Packets are standard IEEE 802.3 format using a UDP level protocol. The

ALE Server is setup to receive host conﬁguration packets on UDP Port # 34000 by default. To

change this see Chapter 9 - ALE Server Utilities in RMS.

Typically, this interface would be used in the beginning of an exercise to initialize the ALE Server

parameters. Once the parameters for a particular exercise have been set, they will remain constant

until the host sends another packet to overwrite them. Note that the ALE Server stores data on a

per exercise data, so that multiple simultaneous independent exercises can be run, with different

parameter values. Note that two radios cannot have identical DIS IDs (host:site:entity:radioID) or

callsigns across exercise numbers.

Before going into the speciﬁc packet type the user must understand the ALE Mode of a radio.

When a radio registers with the ALE Server it must be assigned a mode. The mode identiﬁes the

radio state in terms of ALE status. There are 4 ALE modes:

Table 5: ALE Modes

Name Mode Description

NON_ALE 0 The Radio is not an ALE Radio.

SCANNING 1 The Radio is in scanning mode based on the frequency list

provided.

XMIT 2 The Radio is currently transmitting and should not be consid-

ered to be available for an ALE call message.

REMOVE 3 Setting the mode of an ALE Radio to 3 will remove it from the

ALE database. The Radio would then have to be re-initialed if

it wished to come back into the ALE pool.

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ASTi Telestra User's Guide Page 143