E F Johnson Company 2425372 Benutzerhandbuch
Draft
-14 5300 ES Series Mobile Radio Operating Manual
December 2006
5.15.2 Group ID Code
Each Project 25 channel is programmed with a group ID that determines which group of
mobiles will receive the call. A call is received on a channel if a selected or scanned
channel is programmed with that ID and the correct NAC is detected (see following).
Group IDs can be any number from 0-65,535. Group ID detect can be disabled by the
Normal/Selective squelch function described in Section 5.4 and the Monitor Mode
described in Section 5.2.
mobiles will receive the call. A call is received on a channel if a selected or scanned
channel is programmed with that ID and the correct NAC is detected (see following).
Group IDs can be any number from 0-65,535. Group ID detect can be disabled by the
Normal/Selective squelch function described in Section 5.4 and the Monitor Mode
described in Section 5.2.
5.15.3 Network Access Code (NAC)
Project 25 conventional channels also use a NAC (Network Access Code) to control which
calls are received on a channel. The NAC can be 0-4095, and each transmit and receive
channel can be programmed for a different code. Other operation, such as monitoring
before transmitting, is similar to that of analog channels. NAC (and group ID) detect can
be disabled by the monitor mode described in Section 5.2.
calls are received on a channel. The NAC can be 0-4095, and each transmit and receive
channel can be programmed for a different code. Other operation, such as monitoring
before transmitting, is similar to that of analog channels. NAC (and group ID) detect can
be disabled by the monitor mode described in Section 5.2.
5.15.4 P25 Group Calls
P25 Group calls are placed by simply selecting the channel programmed for the desired
group, monitoring the channel if required, and transmitting. When a P25 group call is
received, the alias (or frequency) of the selected channel is displayed. The radio can be
programmed so that the following are also displayed for 0.5-7.0 seconds or continuously
during the call.
group, monitoring the channel if required, and transmitting. When a P25 group call is
received, the alias (or frequency) of the selected channel is displayed. The radio can be
programmed so that the following are also displayed for 0.5-7.0 seconds or continuously
during the call.
P25 PTT ID - The unit ID of the mobile placing the call is displayed.
P25 Talk Group - The alias of the talk group on which the call is being received is
displayed.
displayed.
User Group ID - If the group ID of the call being received is included in a
preprogrammed User Group ID list, the alias programmed in that list for that group is
displayed.
preprogrammed User Group ID list, the alias programmed in that list for that group is
displayed.
5.15.4.1
Changing Talk Group Assigned To a Channel
If the TG SEL option switch is programmed, the talk group assigned to a channel can be
changed by the user. The new talk group continues to be assigned to the channel until it is
manually changed again (cycling power or selecting another channel does not reselect a
default talk group). Change the talk group assigned to a channel as follows:
changed by the user. The new talk group continues to be assigned to the channel until it is
manually changed again (cycling power or selecting another channel does not reselect a
default talk group). Change the talk group assigned to a channel as follows:
1 Select the channel to be changed and then press the TG SEL option switch.
2 Rotate the Select switch to display the talk group to be assigned to that channel. Talk
groups are indicated by a unique identification in the alphanumeric display.