Document Conventions
Owner’s Manual
2
Term
Description
Half-duplex
Half-duplex communication is also called “two-way alternate communication”. It
indicates the communication is provided in both directions, but only one direction at
a time, that is, only one party is allowed to transmit or receive at a time.
Full-duplex
Full-duplex communication is also called “full-duplex synchronous communication”.
It indicates the communication is allowed in both directions simultaneously, that is,
both parties can transmit and receive at the same time.
Direct Mode
Operation
(DMO)
DMO supports half-duplex operation and allows the terminals to communicate
directly with each other, without using a TETRA network infrastructure. Thus
functions that require network access, such as telephone call, will be unavailable.
Trunked Mode
Operation
(TMO)
TMO supports either half-duplex or full-duplex operation and allows the terminals to
communicate with each other via the TETRA network. Thus functions that require
network access are available. To operate in TMO mode, the terminal must be
granted authorization by your service provider, and must stay within the network
coverage.
