GME GA9800 Instruction Manual page 162

gROUp CAllINg
the tX3340's selcall system includes a Group call function which
allows you to call up to 1000 radios simultaneously. this can be
useful in an emergency situation where you may need to transmit a
message to a large number of radios in your group.
By default, your radio is factory-set to allow up to 10 radios to be
called at once. if your application requires more, you can arrange
for your retailer to re-program this option to allow 100 or 1000
radios to be called. the following description assumes the default
Group call setting of 10 radios.
the Group call function works by allowing you to enter a special
'group code' into the last digit position of the selcall ident you are
sending. the 'group code' appears as 'A' when displayed in the
radio. When this 'group code' is received, it substitutes for all other
numbers in the last digit position. As long as the first 4 digits of the
selcall you are sending match those of the radios you are calling,
their selcall alarm will be activated as if their full 5 digit selcall
idents had been received.
to achieve this, the 10 radios you are calling must be programmed
with sequentially numbered selcall idents.
e.g. 12330, 12331, 12332, 12333 . . --> , 12339
• transmitting the selcall ident 12331 will only activate the alarm
in the radio with the selcall ident of 12331.
• transmitting 1233A will activate the alarms in all radios with
idents 12330 through 12339 (a total of 10 radios).
if the radios in your fleet do not have sequentially numbered selcall
idents and you want to make use of this function, you can arrange
for your retailer to re-program the selcall idents in your radios.
programming anD SenDing group callS
the process for entering a Group call ident is the same as entering
a normal selcall ident.
1. Press the CALL button. 'cAll to' is displayed, along with the
last sent or received selcall ident.
2. Enter the required selcall ident as follows:
(a) Press the PRI key until the radio beeps. the right-hand digit
of the selcall ident will flash.
(b) Press the or keys to select 'A' in the flashing digit
position. this is the special code that will create the
Group call.
(c) Briefly press the PRI key again to select the next
digit position.
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(d) repeat steps (b) and (c) to enter the other 4 digits
as required. the last digit will be set to 'A'.
once the ident has been entered you have 10 seconds to send it
otherwise the cAll to mode will be cancelled and the ident you
entered will be lost.
Note:
Where your tX3340 allows it, programming group calls for
100 radios is identical except that you will need to select 'A' for
the last two digits (e.g. 123AA). For 1000 radios you will need to
select 'A' for last three digits (e.g. 12AAA).
e.g.
100 radios ident sent: 123AA idents called: 12300 -> 12399
1000 radios ident sent: 12AAA idents called: 12000 -> 12999
To send the Selcall Ident
With the required selcall ident displayed in the cAll to mode,
press and hold the CALL button for a few seconds until the radio
beeps. the selcall ident will be sent automatically and the radio
will return to normal operation.
Call Acknowledge in Group Mode
there is no call acknowledge when sending group calls. this is to
prevent all the radios in your group from trying to respond to your
selcall transmission at the same time.
Storing Group Call Idents
Group call idents can be stored in memory in the same way as a
standard selcall ident.
Receiving Group Calls
receiving a Group call is identical to receiving a normal selcall
except that the alarm sound is a loW tone beep instead of the
normal hiGh tone beep. the callers ident or AlPhA name appears
on the display in the usual way.
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