E F Johnson Company 2425333 ユーザーズマニュアル
6-20
SMARTNET / SmartZone / P25 Trunked Features
the radio searches the list of control channels programmed into the radio.
Full Spectrum CC Scan - If the two preceding methods do not locate a control
channel, every channel available to the radio is searched.
channel, every channel available to the radio is searched.
6.13.9 Talkgroup Steering through System Access Permissions
To use system channel resources more efficiently, some system operators are using system
access permissions to steer certain talkgroups to particular sites. For example, a police
department may be allowed to use only Site 1, and a public works department may be
allowed to use only Site 2.
access permissions to steer certain talkgroups to particular sites. For example, a police
department may be allowed to use only Site 1, and a public works department may be
allowed to use only Site 2.
The problem with this operation is that every time a different talk group is selected, the
access permission may be different and a different site may need to be accessed. This
could result, in a worst case, in a delay of up to 30 seconds in finding a new site. This
could occur if there are no valid sites for the new talk group in the dynamic site list.
access permission may be different and a different site may need to be accessed. This
could result, in a worst case, in a delay of up to 30 seconds in finding a new site. This
could occur if there are no valid sites for the new talk group in the dynamic site list.
6.13.10 P25 Wide Area Scan
This feature is intended to enhance roaming performance, especially when system level
steering through radio or talk group permissions is used.
steering through radio or talk group permissions is used.
To use system channel resources more efficiently, some system operators are using system
access permissions to steer certain talkgroups to particular sites. For example, a police
department may be allowed to use only Site 1, and a public works department may be
allowed to use only Site 2.
access permissions to steer certain talkgroups to particular sites. For example, a police
department may be allowed to use only Site 1, and a public works department may be
allowed to use only Site 2.
A Wide Area Scan can be programmed to minimize the problem just outlined. This feature
is programmed on the Talk Group list screen selected on the P25 System screen. When
Wide Area Scan is selected, talk group site preferences are no longer available. However,
System Site Preference lists can still be used. The Wide Area Scan feature functions as
follows:
is programmed on the Talk Group list screen selected on the P25 System screen. When
Wide Area Scan is selected, talk group site preferences are no longer available. However,
System Site Preference lists can still be used. The Wide Area Scan feature functions as
follows:
1Assume TG1 is selected. If it is the first time this talk group is selected, normal searching
for a control channel occurs according to the hunt methods previously described.
2 When another talk group is selected, the active valid site for TG1 is stored in EEPROM
memory.
3 The next time TG1 is selected, the following procedure is performed before performing
the normal hunt methods previously described.
a
The last valid site ID and its receive and transmit channel numbers are loaded from
EEPROM memory.
EEPROM memory.