Operating Manual Part 15

October 2008 5300 ES Series Mobile Radio Operating Manual 6-19
SMARTNET / SmartZone / P25 Trunked Features
Note If a site failure occurs, the radio will automatically leave the failed site and register on
another site (after a predetermined delay). When the failed site recovers, the radio will
(after a predetermined delay) return to the site.
6.13.4 Locking / Unlocking a Site
It is sometimes desirable to stay on a site. To prevent the radio from searching for a new
site, lock it on the current site by pressing the LOCK option switch. The display then
momentarily indicates the site alias to indicate that the current site is locked (“x” is the
current site number). To unlock the site, press the LOCK option switch again and
“UNLOCK” is momentarily displayed.
6.13.5 Auto Site Search
Auto site search automatically searches sites and ranks them in a “Best Sites” list. Press
the Auto Site Search option switch to display the current site number or alias and RSSI
level of the current site. Press and hold the Auto Site Search option switch to move from
the current site and scroll through the Best Sites” list.
6.13.6 ZoneFail Site Lock
This is an optional feature that can be enabled only by factory programmed. It does not
require any special inputs from the infrastructure to operate. This feature is intended to
prevent some of the confusion resulting from a site controller failure. When this occurs, all
sites go into the Site Trunking mode and radios will be unable to roam normally. The
result is that the various radios selected by a particular talk group may be operating on
different sites and are unable to talk to each other (see Section 6.13.2 for more Site
Trunking information).
With the Zone Fail Site Lock feature enabled, the radio continues to roam normally when
the system zone controller is active. However, if the zone controller fails, this is detected
and the Zone Fail Site Lock mode is entered. The only site the radio is then allowed to
operate on is its home site. If its home site is not available, “OUT-OF-RANGE” is
displayed. A zone controller failure is detected by determining that every site in the
dynamic site list is in Site Trunking. Currently, this condition must be detected for at least
1 minute for the Zone Fail Site Lock mode to be selected.
The result of this operation is that all radios with the same programmed home site are
forced to the home site to communicate which ensures that they can continue to
communicate. If the home site is not available, the Out-of-Range condition tells the user to
attempt communication on another system or by some other means.