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3
Receive from the system a message for traffic channel assignment.
The “
” icon blinks, and the transceiver enters a state allowing
transmission of a Group Call.
4
Press the
PTT
switch.
The Group Call is initiated. Even if the
PTT
switch is being pressed and held to receive a message for traffic channel
assignment, transmission by a Group Call is initiated.
If the transceiver receives a message to terminate the call on the traffic channel, the Group Call ends and the
transceiver restores the control channel.
Menu
Zone+
Z o n e 1
T a l k g r o u p 1
12 : 34
A
M
Note
0
If
Transmit LED
is enabled, the LED lights red when the transceiver is transmitting. (Refer to Common FUNC
.)
0
If
Busy LED
is enabled, the LED lights green regardless of whether reception is enabled or disabled on a traffic channel.
0
If
Optional Signaling LED
is enabled, the LED flashes in yellow. (Refer to
.)
0
If
Selective Call Alert LED
is enabled, the LED flashes when the transceiver is receiving. (Refer to
of the transceiver when receiving a Group Call (P25 Trunking)
0
If
Call Request Tone
is enabled, a Call Request Tone (1 beep) sounds from the transceiver when a call requesting a
Group Call is initiated. Also, if
Call Processing Tone
is enabled, a Call Processing Tone (2 beeps) sounds from the
transceiver until the transceiver receives from the system a message for traffic channel assignment after the call
requesting a Group Call is initiated. (Refer to
Notifying the User with a Tone That a Call Request Has Been Initiated (Call
.)
0
If
PTT Proceed Tone
is enabled, a Proceed Tone (3 beeps) sounds from the transceiver when the transceiver becomes
ready for communications after the
PTT
switch is pressed. (Refer to Common FUNC
Using Sound to Notify the Timing
to Start Communications (PTT Proceed Tone)Using Sound to Notify the Timing to Start Communications (PTT Proceed
Tone)
.)
0
If the
PTT
switch is released immediately after being pressed, the transceiver sends a message requesting a Group Call,
and sends a 3 sec voice transmission on a traffic channel after receiving a message for traffic channel assignment from
the system. If the
PTT
switch is pressed during this time, the transmission can be continued.
About Hang Time
If the voice communication by Group Call is terminated by releasing the
PTT
switch, the system sends muted data for a
fixed time on the control channel. The period of sending this muted data is referred to as Hang Time.
If transmitting again during Hang Time, the behavior differs as the following:
0
If the traffic channel is FDMA:
The transceiver behaves as follows according to the configuration in
Trunking Type
.)
0
If “Transmit” is configured in
Trunking Type
:
Cannot transmit again even if the
PTT
switch is pressed.
0
If “Message” is configured in
Trunking Type
:
Voice transmission is initiated if the
PTT
switch is pressed.
0
If “PTT ID” is configured for
Trunking Type
:
The transceiver migrates to a control channel and then sends a request message for a Group Call if the
PTT
switch
is pressed.
2 P25 TRUNKING SYSTEM
2.7 Making a Group Call
P25 FUNC (K)/Ver 2.20
98