Product Manual

XRS-370C
35
GROUP CALLING
The SelCall system includes a Group Call function that 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, your dealer can re-program this option to allow
100 or even 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 of the SelCall number you are sending. The ‘group code’ appears
as an ‘A’ (All) when displayed in the radio. When this ‘group code’ is received, it
substitutes for all other numbers in that position. As long as the rst 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 have sequentially numbered SelCall
Idents.
e.g. 14530, 14531, 14532, 14533, 14534, 14535, 14536, 14537, 14538, 14539
Transmitting the SelCall Ident 14531 will only activate the alarm in the radio with
the SelCall Ident of 14531. However, transmitting 1453A will activate the alarms in
all radios with Idents 14530 through 14539 (a total of 10 radios).
If the radios in your eet do not have sequential SelCall number and you want to
make use of this function, you will need to re-program the SelCall Idents in your
radios by changing the numbers in your radio’s ‘OWN’ SelCall memory.
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 MENU key.
2. Use the
or
keys to select SelCall and press MENU to select.
3. Select MAKE SELCALL and press MENU.
4. Use the
or
keys to change the digit at the cursor position.
Press MENU [SEL:NEXT] to step forward to the NEXT digit position
or BACK to step back to the previous digit position.