Kenwood NEXEDGE NX-200 Function Reference page 331

11 LTR TRUNKING SYSTEM
11.6 Other LTR Functions
Transmit
Receive
Transmit
Receive
Configuration using KPG-111D/ DN
Configuring the Clear to Talk (
Terminating Data Communication by a Single Link (ARQ Mode)
ARQ Mode is the function used to terminate data communications in an LTR Trunking system by a single link operation.
The transceiver normally needs to link to a repeater every time to send data in an LTR Trunking system. In this case, it may
take a longer time to send data, or a data transmission may fail if the system is busy and there is no available channel on
the repeater. ARQ Mode can avoid these problems and unfailingly complete data communications with a single link.
If ARQ Mode is used, the transceiver does not send the EOT until the transceiver finishes data communications once the
transceiver establishes a link to the repeater. The transceiver will retain the linked state using the Hang Up Time
configured for the repeater and then send or receive the acknowledgment during the Hang Up Time. ARQ Mode can be
used to send data using FleetSync. For Mobile, ARQ Mode is also used for data communications by connecting to an
external modem.
Transceiver Behavior
 Data transmitting side
ARQ Mode is activated if data communications using FleetSync is started. The transceiver will not send the EOT when
the transceiver finishes sending data. The transceiver sends the EOT and aborts ARQ Mode when all FleetSync data
communications are completed.
 Data receiving side
The state of the TOR port will go low level if the transceiver receives a Data GID signal. ARQ Mode is activated if the
transceiver recognizes that data communications using FleetSync has received. The transceiver does not connect by
sending back an acknowledgment, etc., but the transceiver sends data on the channel specified by a repeater. In this
case, the transceiver does not send the EOT.
When the Transceiver is sending or receiving Data using an External Modem (Mobile Only)
 Data transmitting side
ARQ Mode is activated if the DTC port goes low level by an operation of an external modem. Then, the transceiver
transmits and receives using the Data GID. Transmission and reception during the period are controlled by the External
PTT (Data) port. The transceiver will not send the EOT (End of Transmit) when the transceiver finishes sending data. If
the External PTT (Data) port goes high level after the DTC port goes high level, the transceiver sends the EOT and
then the transceiver will abort ARQ Mode when the amount of time configured for Data Dwell Time elapses.
FUNC (K)/Ver 4.00
PTT
*1
If Proceed Tone is enabled.
Figure 11-5 Clear to Talk
FPRG 8.11.2 LTR Tab)
See
*1
Delay Tone Proceed Tone
Delay Tone Intercept Tone
Succeeded
in connecting
at the 6th
attempts
Failed in
connecting
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