Icom UT-111 Instruction Manual page 10

1 + Operation
1.4
A Transpond Function is also available when the Selective Call DTMF
Decoder is enabled. After receipt of a selective call, the transceiver will
key the transmitter on the selected Group ID, and transmit a double beep
tone to confirm that the selective call was received. This feature can be
enabled or disabled for each programmed Group ID. The Transpond
Function should only be used when selective calling individual
transceivers. Otherwise, multiple transceivers will send the transpond
signal on the trunking system at the same time causing a collision.
When sending a DTMF selective call to a transceiver, or group of
transceivers, each digit should be sent at a rate of at least one digit per
second. The Selective Call DT[MF Decoder may be programmed with
any digits from 0 to 9.
Radio Kill Function
The Selective Call DTMF Decoder is also used to disable a transceiver
(Radio Kill) from a remote location. Upon receipt of the Radio Kill DIMF
signal, the transceiver will be disabled, and will generate a continuous
low beeping tone. The transceiver will also key the transmitter on the
selected Group, and transmit a double beep tone to confirm that the Radio
Kill instruction was received, The transceiver may then only be reactivated
by the radio dealer by PC programming, or by entering the Alignment
Mode. Each transceiver in the system should be programmed with a unique
Radio Kill DTMF sequence to allow any individual radio to be disabled.
However, any number of transceivers may use the same DTMF Kill
sequence to deactivate multiple transceivers simultaneously.
Although a transceiver may receive the Radio Kill instruction on any
programmed Group ID, the transceiver must have the correct Group ID
selected. Since the Priority Receive ID takes precedence over all other
ID Codes, a Radio Kill instruction should be transmitted using the Priority
Receive ID to insure the instruction is received by the transceiver.