Hytera DMR System Planner
46
as short as possible. This ensures that the auto site roam finds a new site rapidly
and disallows the user to initiate the active site roam.
Note: roaming will not occur in the emergency mode if the active site roam is
disabled.
2.7.1.3 Configuring the Roam List
It must be noted that a system contains more than one IP Multi-site Connect system,
namely, a wide area system. In general, a wide area system comprises one or
multiple wide area channels, each of which is a separated voice path. Hence, the
user only needs to configure the required wide area channel to the roam list.
You can refer to IP Multi-site Connect Application Notes for details about the wide
area system.
It is necessary to store the required site into the roam list. This list shall contain a
logic channel, which includes the frequency pair, color code and time slot
combination.
It is important to understand that when the mobile terminal determines a new master
site to be a member in the roam list, only the logical attributes in this list are utilized
and other attributes are used from the selected channel personality.
The following logic attributes of the master site shall be utilized:
Transmit frequency and transmit reference frequency
Receive frequency and receive reference frequency
Color
code
Time
slot
Talk
Around
setting
GPS Revert channel
Emergency (include Emergency Revert Channel)
More attention shall be paid to GPS revert and emergency revert. Because the
logical channels for each site are different, the revert channels must be changed
when the mobile terminal roams from one site to another. We recommend that
emergency configurations for all channels should remain the same within a roam list.
Otherwise, the mobile terminal may perform an emergency differently when it moves
from one site to another.
The remaining attributes, such as Transmit and Receive Group List, Channel
Access, etc, should be utilized from the currently selected channel, no matter which
site the mobile terminal currently roams to. Preferably, the attributes of these
parameters in the roam list shall keep the same, so that the mobile terminal
operates consistently no matter whether it roams to the channel or the user selects
the channel.
Summary of Contents for PD70X Series
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