Queclink GL300, Руководство пользователя

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GL300 @Tracker Air Interface Protocol
terminal connects to the backend server every time it needs to send data and will shut
down the connection when the terminal finishes sending data. And if it is failed to
establish a TCP connection with the backend server (including Main Server and
Backup Server), it will try to send data via SMS.

2: TCP short-connect forced mode. The connection is based on TCP protocol. The
terminal connects to the backend server every time it needs to send data and will shut
down the connection when the terminal finishes sending data. And if it is failed to
establish a TCP connection with the backend server (including Main Server and
Backup Server), it will be stored in the BUFFER (if BUFFER function is enabled,
please refer to <Buffer enable>) or discarded (if the BUFFER function is disabled).

3: TCP long-connect mode. The connection is based on TCP protocol. The terminal
connects to the backend server and maintains the connection using the heart beat data.
Please note that in this mode the backend server should respond to the heart beat data
from the terminals.

4: UDP mode. The terminal will send data to the backend server by UDP protocol. It
supports to receive protocol command via UDP. But it is recommended to make sure
the IP address and UDP port of the device can be visited in the internet, and this is
generally realized by heart beat package and the mRESP:GTPDP.

5: Force on SMS. Only use the SMS for transmitting.

6: UDP with fixed local port. Like the UDP mode, the terminal will send data using
UDP protocol. The difference is the terminal will use fixed local port rather than
random port to communicate with the server in this mode. Thus the backend server
could use identical port to communicate with all terminals if the backend server and
the terminals are all in the same VPN network. The port number the device uses is the
same as the port number of the primary server.

< Reserved >: .Not used at present.Please keep empty

< Buffer enable >: Enable or disable BUFFER function. Please refer to 3.3.5 for the details
about BUFFER function.

0: Disable the BUFFER function.

1: Enable the BUFFER function.

2: High priority. Enable the buffer report function. Under this working mode, the
device will send all the buffered messages before sending any normal message except
for the SOS message (+RESP:GTSOS).

< Main server IP/domain name >: The IP address or the domain name of the main server.
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< Main server port >: The port of the main server.
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< Backup server IP >: The IP address of the backup backend server.

< Backup server port >: The port of the backup server.

< SMS gateway >: Maximum 20 characters including the optional national code starting with
“+” for SMS messages. Short code (for example: 10086) is also supported.

< Heartbeat interval >: the interval for the terminal to send heartbeat package message to the
backend server. If set to 0, no heartbeat package is sent.

< SACK enable >: A numeric to indicate whether the backend server should reply SACK
message to the device.

0: the backend server does not reply SACK message after receiving a message from
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