Operator`s manual

RECOVERY (REVERTS)
4-3
June 1997
Part No. 002-0690-201
4.3 MANUALLY UNREVERT AND REVERT
CHANNELS
CAUTION
Use extreme caution. Consider the effects that
changes will have on the entire system.
The revert status of channels can be seen by
selecting a System icon and then selecting menu item
System -> Channel Revert. A dialog box shows the
system name, the total number of channels in the sys-
tem, and the number of reverted channels. There is
also a list of repeater numbers, channel numbers, and
their current revert status. If the system has automati-
cally reverted a channel, its status will be Reverted,
otherwise the status is Normal.
The system will not automatically unrevert a
channel. To unrevert a channel, select the channel in
the list and click the UnRevert button. If the prob-
lem(s) that caused the revert has not been repaired, the
channel will again automatically revert. To manually
revert a channel, select the channel in the list and click
the Revert button.
To unrevert individual repeaters and keep the
channel 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 chan-
nel status will remain reverted and additional alarms
on the channel will not revert the channel.
4.4 CHANNEL UNREVERT EXAMPLES
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.
NOTE: If a channel that has failed repeaters is unre-
verted, radios that receive data from the sites that have
failed repeaters will not hear calls made on the unre-
verted channel. Remember to consider the condition of
home channels and the status channel when unrevert-
ing channels.
A simulcast system can be configured to automat-
ically shut down all repeaters that are on a channel that
has simulcast failure, repeater failure, or RNT/CIM
Channel Problem alarms. Channel reverts are config-
ured by the System Manager. Channels are unreverted
using menu item System -> Channel Revert (as
described in Section 4.3).
• Low-Usage Area with Failure
If a system has reverted a channel because of a fail-
ure at a site in a low-usage area, the channel may be
unreverted to provide high-usage areas with all
channels. Radios receiving data from the site with
the failed repeater will not hear calls made on the
unreverted channel.
• Status Channel with Failure
If the status channel is reverted, unreverting it will
optimize system response at sites with no failures.
Radios in coverage areas with status channel fail-
ures will still receive update information on their
home channels. No calls will be heard on the status
channel from sites with failed repeaters.
The status channel can be configured to never
revert.
• More Failures Than Channel Revert MIN
If the system has reverted as many channels as it can
(as defined by Channel Revert MIN), additional
failures on other channels will not cause channel
reverts. Channels are reverted in the order that
OpenView receives the alarms; however, if Channel
Revert MIN is reached and there are more problems,
it may be wise to unrevert some channels and revert
others.
For Example: A system may revert a home channel;
then, a non-home channel has problems but is not
reverted because the system has already reverted the
number of channels that it is automatically allowed
to revert. In this case, the system may work more
efficiently if the home channel is manually unre-
verted and the non-home channel is manually
reverted. Radios on the unreverted home channel
that receive data from the site with the failed
repeater will not receive data from the home chan-
nel, but they will still receive data from the status
channel.