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RX Voice Interrupts Data
RX Voice Interrupts Data
is the function to stop data communications and then start to receive audio when the transceiver
receives a message including Group Call information (LC_GRP_V_CH_UPDT) during SNDCP data communications in a
P25 Trunking system.
Note
If the transceiver is used with
RX Voice Interrupts Data
enabled, the system must be configured to send a message
including the Group Call information on a data channel.
2.18
Sending GPS Data
Global Positioning System (GPS) is the system to acquire the current location information of the own transceiver by receiving
signals from the Global Positioning System satellites orbiting the earth.
The transceiver of the mobile station can send the acquired own location information (GPS data) to the base station. The
base station can send received GPS data to the PC as serial commands.
The GPS function in a P25 Trunking system uses the data communication function by using SNDCP and UDP/IP. The
location information received from the GPS receiver unit connected to or built in the transceiver can be transmitted to a
preregistered destination, the requester of the location information, or the destination specified by the requester of the
location information by using Location Request/ Response Protocol (LPRP) of Tier 2 Location Service which complies with
P25 Packet Data communications and TIA-102 BAJC.
Note
The GPS function in a P25 Trunking system supports LRRP Version 1.
Transmission Method of GPS Data
In a P25 Trunking system, a user can send the GPS data by using the following services:
0
Immediate Location Service
The transceiver sends the GPS data when a transmission request message for GPS data is received from a base station
or an external device such as a PC.
0
Triggered Location Service
If the transceiver receives a transmission request message for GPS data with following conditions specified from a base
station or an external device such as a PC, the transceiver sends the GPS data according to the specified conditions.
0
The number of times to send the location information (once or at regular time intervals)
0
Destination (Recipient)
0
The time to start sending
0
The time to stop sending
0
Sending when the transceiver is turned ON
0
Sending when the transceiver is turned OFF
0
Sending when the transceiver enters Emergency Mode
0
Sending when the Interval Time elapses
0
Sending when the transceiver has moved a specified distance
2 P25 TRUNKING SYSTEM
2.17 SNDCP
P25 FUNC (K)/Ver 2.20
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