�1���� Introduction
�2���� Electronic
messaging
������� 2.1���� Operational
characteristics
������� 2.2���� General
description
�3���� Interactive
Internet and Intranet applications
������� 3.1���� Operational
characteristics
������� 3.2���� General
description
�4���� File
transfer
������� 4.1���� Operational
characteristics
������� 4.2���� General
description
�5����
Digital voice
������� 5.1���� Operational
characteristics
������� 5.2���� General
description
�6���� Software
defined radio
������� 6.1���� Operational
characteristics
������� 6.2���� General
description