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53SL ES Series Mobile Radio Operating Manual April 2009
SmartZone and P25 Trunking Unique Features
Section 7 - SMARTNET / SmartZone / P25 Trunked Features
not allowed if the talkgroup is assigned as a dynamic regrouping talkgroup only. If it is
assigned as a normal talkgroup, normal transmissions are allowed. When a Cancel
order is received, the mobile moves back to your last channel unless the Lock order was
received.
7.13
SmartZone and P25 Trunking Unique Features
SmartZone
®
and P25 Trunked modes can provide access to single or multi-site systems.
The P25 Trunked mode can provide access to a single trunked site or roaming between
several trunked sites.
7.13.1 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).
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.
7.13.2 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.
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