OPERATION
3-19
Revised February 1997
Part No. 001-9750-005
3.7.2 AUTO-REGISTRATION (MULTI-NET)
Introduction
Auto-registration is also described briefly in
Section 5.8.12. This feature permits telephone and
unique ID calls to be automatically routed to the site in
which a mobile is operating. Standard calls can also be
routed if the Site Tracking Module (STM) in the RNT
is configured appropriately. To utilize auto-registra-
tion, it must be enabled by system operator program-
ming and system scanning must be enabled by the
SCAN switch. In addition, it must be enabled by the
Menu Mode “MN AUTOREG” parameter if it can be
selected.
Auto-registration effectively controls the revert
(selected) system when scanning (refer to Section
3.4.4). Therefore, auto-registration can be used with
the “Last Selected” and “Temporary” modes but not
“Last Received”.
Upon entering the scan mode or if the signal from
the currently registered site is weak, the transceiver
begins checking all programmed status channels to
locate one with suitable signal strength. When one is
located, a registration message is sent to the repeater.
The repeater then forwards the information to the
RNT. The location of the mobile is then known and
when a call to that mobile is placed, it is automatically
routed to the correct site.
When the mobile is searching for a site on which
to register, “AUTO REG” and the scan message are
alternately displayed. If a user wants to maintain
communication on a site regardless of signal strength,
auto-registration or scanning can be turned off. This
permits communication with a group in marginal
signal conditions.
Revert System/Group After Registration
After registration occurs, “AUTO REG” is no
longer displayed and the revert system is the next
higher system with a different site number that could
be accessed (wrap-around occurs after the highest
system is checked). For example, if System 3 was
selected and System 5 is the next system with a
different site number, that system becomes the revert
system if it can be accessed.
Revert group selection is determined by the
programming of the bank “Wide Area Group
Tracking” parameter. If this parameter is programmed
“Yes”, the revert group does not change (it is the same
as it was before registration on the new site occurred).
If this parameter is “No”, the revert group is the group
that was displayed when that system was last selected.
Refer to Section 4.4.6 for more information on proper
wide area group tracking programming.
NOTE: The preceding “Wide Area Group Tracking”
parameter is available only if the transceiver has soft-
ware Version 206 or later (see Appendix A). With ear-
lier versions, the “No” condition is always selected.
Scanning With Auto-Registration
Auto-registration functions with both single- and
multiple-site scan (see Section 3.4.2) and scanning
continues in the normal manner. However, if LTR or
conventional systems are scanned in addition to Multi-
Net systems, registration occurs only on Multi-Net
systems.
Scan Dropout Criteria
The point at which registration on another site
occurs is controlled by the percentage of good data
messages that must be received over a 10-second
period to stay on the current site. With this transceiver,
this percentage can be programmed for 50-100% on
each Multi-Net site. The default is 75% (33 good
messages out of 44). The higher the percentage, the
sooner auto-registration occurs.
Wide Area Coverage Enhancements
With software Version 206 or later, the following
enhancements have been made to provide better wide
area coverage. The programming of the bank “Wide
Area Group Tracking” parameter does not affect these
features. (That parameter controls only the revert
group that is selected after registration occurs.)
•
The transceiver registers on a site even when not
actively scanning (such as when the microphone is
off-hook). Other requirements are that the single-
site type of scanning must be selected and scanning
must be enabled by the Scan switch.
Содержание Summit DM 975x
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