E.F. Johnson Company Viking VM600, Руководство по эксплуатации

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Draft 02 - Sep 1 2015
6-22 Viking Mobile Radio Operating Manual
SMARTNET / SmartZone / P25 Trunked Features
6.14.1 Busy Override
The busy override feature is enabled at the system level by the system manager and is not
a programmable radio feature. It allows a call to be placed even if not all of the sites you
are calling have a free traffic channel. The only sites guaranteed to be included are the
Critical Sites and the sites where a Critical User is located. This feature operates as
follows:
1
Assume that you have attempted to place a call and the system was busy (“BUSY”
displayed and busy tone sounded). The regroup group is automatically selected and
displayed.
2
Release the PTT switch and then press it for five seconds or more. If a chirp-like tone
sounds with the PTT switch pressed, busy override is occurring.
Note
Remember that not all members of the talkgroup are receiving your message. Missing
members will start receiving your message as channels become available.
6.14.2 Site Trunking
Site trunking occurs when a site can no longer participate in wide area trunking. It is
disconnected from other sites and only supports calls with other radios on that site and
cannot route audio to other sites. When site trunking is occurring, the radio searches for
other sites that may provide wide area coverage.
Site trunking ends when a wide area coverage site is located, the current site is operating
again as a wide area coverage site, an out-of-range condition occurs, or the failsoft mode is
entered. The radio can be programmed so that “SITE TRUNKING” is displayed and/or an
alert tone sounds when site trunking occurs.
SmartZone and P25 trunking systems can be programmed for “Disable Site Trunking
Operation”. The radio is then not allowed to start or operate on a site trunking site. If a site
goes into site trunking, the radio leaves that site’s control channel and attempts to 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.
6.14.3 Determining Current Site and Searching for a New Site
To display the RSSI level of the current site, press the SITE SEARCH option switch. The
display then indicates the current site number as “SITE xx” and the RSSI (Receive Signal
Strength Indicator) signal level as “RSSI xx”. This mode is then automatically exited.