Hytera DMR System Planner
45
Auto site roam is not triggered by one of the following events:
The mobile terminal is transmitting
The mobile terminal is receiving a call or data service
The mobile terminal is in Emergency mode
The mobile terminal is in good coverage
The mobile terminal is operating in Talk Around mode
The mobile terminal is killed
The mobile terminal is monitoring remotely
The menu of the mobile terminal is active
The mobile terminal operates on the channel with a scan list
2.7.1.2 Active Site Roam
With the active site roam enabled, if the user presses the PTT or the emergency key,
or the message is sent, the mobile terminal will first try to wake up the repeater on
the current channel. If a repeater is not available, the mobile terminal will repeat this
process for each member in the roam list till an active one (site) is found. Afterwards,
the mobile terminal will synchronize itself with this active repeater, finish the
transmission and identify it as the master site. If the entire roam list is searched and
no site is found, a failure indication will be provided to the user.
The active site roam will occur when the mobile terminal initiates a call but the
corresponding repeater on the current channel is not waked up.
This entire process of discovering and synchronizing with an active repeater
increases the voice access time of the transmission (time from PTT press to Talk
Permit Tone). But this increase only takes place in the first transmission, as the later
transmission will perform normally on the new site.
Note: the wake-up message is always sent politely. This indicates that if the mobile
terminal detects the inference signal, it will not send this message to members in the
roam list. But it will carry on the active site roam according to the next roam list.
Note: the mobile terminal does not perform any auto site roam in emergency mode.
No auto roaming will occur when the mobile terminal is reverted during the
emergency. However, when configured to revert emergency channel and with the
active site roam enabled, the mobile terminal will perform the active site roam
automatically, if the signal strength of the repeater falls below the pre-programmed
RSSI threshold, or no repeater beacon is detected.
Please note that the wake-up message caused by the active site roam will be
transmitted to each member’s frequencies in the roam list till the available site is
found. But the active site roam will not occur in the area where frequency
overlapping and sharing is common. In order to minimize the unnecessary
transmission, the mobile terminal only sends one piece of wake-up message politely.
If this is not acceptable, the active site roam shall be disabled and the beacon be set
Summary of Contents for PD70X Series
Page 1: ...DMR System Planner ...
Page 2: ......
Page 4: ...Revision History Version Date Description Remarks R1 0 November 21 2012 Initial release ...
Page 126: ...Hytera DMR System Planner 122 Figure 1 4 Analog to digital Conversion 2 ...
Page 174: ...Hytera DMR System Planner 170 For your notes ...
Page 178: ...Hytera DMR System Planner 174 For your notes ...
Page 181: ......
Page 182: ......