Sussex ACO Communications

Data Communications

Training Objective:

The cadet should demonstrate theoretical and practical knowledge of a Data Communications system.

Enabling Objectives:

Identify and explain the functions of the component parts of a Data Comms system, i.e. the Power Supply Unit (PSU), Terminal Node Controller (TNC), Personal Computer (PC), Transceiver (TCVR) and the software in use.

Explain the function of a Data Comms Node, and describe its operation as both a Node and Digipeater.

Describe the functions of a Bulletin Board System (BBS), and the role of the Systems Operator (SYSOP).

Demonstrate a good knowledge of Security of Data Comms transmissions together with operating practices and procedures.

Indicate which Cadet channel can be used on a Network, the maximum transmitter power permitted, and the protocol in use over the air (interface).

Relate who may operate a Data Comms system and what qualifications are required.

List the various callsign suffixes used in Data Comms transmissions.

Demonstrate proficiency in Data Comms operation, the operating practices and procedures, sending and receiving a message, sending and receiving bulletins at the BBS and the various functions of a Data Comms node.

Background Information

This is one of the optional modules.

Data communications systems combine radios and computer equipment to enable the passing of messages digitally.

Most areas operating data communications have a central node which also acts as a bulletin board host.  This central node is left on constantly for the benefit of all the other units within range. Individual units can pass messages either directly to units whose equipment is switched on or leave messages on the bulletin  board for collection by one or more recipients at a time convenient to them.

As well as the convenience of leaving messages, data communications systems incorporate error-checking facilities which enable messages to be passed under circumstances which would defeat normal voice messaging.