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find another valid wide area site. If no wide area site is
available, the radio displays "Out-of-Range". If a site
adjacent to the current Home Site was in site trunking
but then enters wide area trunking, it is evaluated to
determine if it should move to that site as a better site.
6.14.4 DETERMINING CURRENT SITE AND
SEARCHING FOR NEW SITE
To display the RSSI level of the current site, press
the Site Search option switch or select that menu
parameter. The display then indicates the current site
number as "SITE xx" and the RSSI level as "RSSI
xx". This mode is then automatically exited.
To scroll through the other programmed sites,
press and hold the Site Search option switch while
"SITE xx" or "RSSI xx" is displayed. If site lock is on
when site search is entered (see following), the radio
will be locked on the new site when this function is
exited.
6.14.5 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 Site Lock option
switch or selecting that menu parameter. 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 Site Lock switch
again or the F2 (Select) key and "UNLOCK" is
momentarily displayed.
6.14.6 ZONEFAIL SITE LOCK
This is an optional feature that can be enabled
only by factory programmed. It is not programmed by
the PCConfigure software, and 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 continue to roam normally according to RSSI
level. 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
6.14.3 for more Site Trunking information).
With the Zone Fail Site Lock feature enabled, the
radio continues to roam normally when the system
SMARTNET/SMARTZONE/P25 TRUNKED FEATURES
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 avail-
able, the Out-of-Range condition tells the user to
attempt communication on another system or by some
other means.
6.14.7 P25 WIDE AREA SCAN
Introduction
This feature is intended to enhance roaming
performance, especially when system level steering
via radio or talk group permissions is used.
Normal P25 and SmartZone Control Channel Hunt
The following control channel search methods are
normally used to find a control channel:
Short Hunt - The dynamic array of 7 (or 15) adja-
cent sites is searched. This list is saved on power
down and loaded again at power up. It is erased
whenever parameters are downloaded to the radio
by the PCConfigure programmer.
Long Hunt - If no valid control channel is located
by the preceding short hunt method, the radio
searches the list of control channels programmed
into the radio by the PCConfigure programmer.
Full Spectrum CC Scan - If the two preceding
methods do not locate a control channel, every
channel available to the radio is searched.
Talkgroup Steering Via System Access Permissions
In order to use system channel resources more
efficiently, some system operators are using system
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