User's Guide

Table Of Contents
channel while direct mode supports only one. Additionally, there are some minor differences. For
example, dual capacity direct mode channels may not be used as GPS revert channels.
The radios are not limited to one direct mode/dual capacity direct mode frequency. They can be
programmed to have different frequencies, which are selectable with the channel selector knob.
Direct mode or dual capacity direct modes do not need over-the-air hang time for voice calls. The radio
has an internal call (“talk back”) timer. The channel access method used before the call timer expires is
impolite, since the radio is still a member of an active call. This is independent of the Channel Access
selection for call initiation (polite or impolite).
MN006217A01-AF
Chapter
4 : System Overview
28