Operator`s manual

RECOVERY (REVERTS)
4-4
June 1997
Part No. 002-0690-201
4.5 MANUALLY UNREVERT AND REVERT
SITES
CAUTION
Use extreme caution. Consider the effects that
changes will have on the entire system.
To see the revert status of sites, select a System
icon and then select menu item System -> Site Revert.
A dialog box shows the system name, the total number
of sites in the system, and the number of reverted sites.
There is also a list of sites and their current revert sta-
tus. If the system has automatically reverted a site, its
status will be Reverted, otherwise the status is Normal.
The system will not automatically unrevert a site.
To unrevert a site, select the site in the list and click
the UnRevert button. If the problem(s) that caused the
revert has not been repaired, the site will again auto-
matically revert. To manually revert a site, select it
from the list and click the Revert button. Alternatively,
sites can be reverted and unreverted by selecting a Site
icon and then selecting menu item Site -> Revert or
Site -> UnRevert.
To unrevert individual repeaters and keep the site
reverted, select a Repeater icon and then select menu
item Repeater -> UnRevert. Repeaters can also be
reconfigured by using the Manual Repeater Control
dialog box covered in Section 4.7. The site status will
remain reverted and additional alarms at the site will
not revert the site.
4.6 SITE REVERT EXAMPLE
The information in this section is for example
only and may or may not apply to a specific system.
Each system should be analyzed for other situations
that may benefit from automatic reverts.
If the home channel of an important group of
users and the Status Channel both fail at a Site, the site
can be automatically reverted and reconfigured to
allow communications within the site. If a system has
very large overlap areas, the affected site might be
shut down without greatly degrading coverage. How-
ever, if shutting down the site would leave large areas
inaccessible, reconfiguring the site to a stand-alone
Multi-Net site may be a better alternative.
NOTE: Subscriber units on the system will need to
have a “backup” system programmed for a stand-
alone Multi-Net site. When the fleet map is produced
for the subscriber units, the site revert actions and the
backup system must be planned together.
CAUTION
Radios monitor their home channel and the sta-
tus channel for over-the-air instructions. If there
are problems
on either channel, radios may not
receive their instructions. Therefore, pay special atten-
tion to the status channel and home channels when
configuring reverts.
The following example shows how a 3-site, 10-
channel system could be configured for an automatic
site revert.
Refer to Figure 4-3. Site 3 has been configured to
revert to a stand-alone Multi-Net Site if repeaters 1
and 3 fail. In this system, repeater 1 is the Status Chan-
nel. Repeater 3 is the Home Channel for the Group
used by a high-priority collection of users. When
repeaters 1 and 3 fail, Groups that use channel 3 as the
Home Channel have no access to the radio system in
the Site 3 coverage area. When the system reverts,
Groups that use a backup subscriber unit system will
have local access for Site 3; other groups will have no
access for Site 3.
When the high-priority users need to use the
repeater at Site 3, they will need to change their radios
to a backup system that is programmed (in this exam-
ple) with repeater 8 as the status channel. Repeater 9 is
the Home Channel for their Group. Trunked communi-
cation will then be available to them within the Site;
however, no audio is sent back to the RNT. Therefore,
there will be no consoles, unique ID calls, or telco
calls from Site 3.