Motorola MCS 2000 User Manual page 194

When the System Wide Transmit field is set to Disabled, the user will
not be allowed to enter 'SYS' (System Wide Talkgroup) into the
talkgroup list of the corresponding personality. The System Wide
Transmit field cannot be set to Disabled if there is a talkgroup entry
which has 'SYS'.
When the Coverage field is set to SmartZone (F4F4F3), PREF SITES
allows access to the SmartZone Preferred Sites linked to this
personality.
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