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Note
If “Off” is configured for TOT Pre-alert, no TOT Pre-alert tone will sound from the transceiver.
TOT Rekey Time
TOT Rekey Time is the amount of time from when the transceiver stops the transmission by the Time-out Timer until
transmission becomes possible again.
Example: Time-out Timer: 30 sec, TOT Rekey Time: 20 sec
30 sec
PTT
Press
Press
Release
No Transmit
TOT
Time
0 sec
TOT Rekey
Time
50 sec
Expire TOT
Expire
Count Start
Count Start
Count Start
Transceiver Transmit
Transmit
Receive
TOT Rekey Time
Figure 1-3 TOT Rekey Time
Note
0
If “Off” is configured for TOT Rekey Time, the transceiver will immediately be ready to transmit.
0
The timer will be reset if the zone or channel is changed while the TOT Rekey Time is counting down.
TOT Reset Time
TOT Reset Time is the time required to initialize and reset the elapsed time for Time-out Timer.
Example 1: Time-out Timer: 30 sec, TOT Reset Time: 10 sec
10 sec
20 sec
25 sec 30 sec
PTT
Press
Press
Release
TOT
TOT Reset Time
Expire
Time 0 sec
Count Start
Count Start
Count Start
Transmit
Transmit
Receive
55 sec
Expire TOT
TOT Reset Time
TOT Reset
Transceiver
Figure 1-4 TOT Reset Time 1
The transceiver considers a retransmission within this configured length of time as a continuous transmission. In the following
example, the counting of Time-out Timer continues because the transmission was started by a user pressing the
PTT
switch
while the TOT Reset Time was counting down.
Example 2: Time-out Timer: 30 sec, TOT Reset Time: 10 sec
10
sec
20
sec
PTT
Press
Press
Release
TOT
30
sec
TOT Reset Time
Time 0
sec
Reset
Expire TOT
Count Start
Count Start
TOT Reset Time
Figure 1-5 TOT Reset Time 2
Note
0
If “Off” is configured for TOT Reset Time, the Time-out Timer will be reset immediately after the transceiver finishes
transmitting.
0
The timer will be reset if the zone or channel is changed while the TOT Reset Time is counting down.
1 P25 CONVENTIONAL SYSTEM
1.1 Initiating Voice Communications (Basic Transmission and Reception)
P25 FUNC (K)/Ver 2.20
6