Add: Unit 704, No. A3 Building, Tel.: +86-592
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6211770
3
rd
Software Park, Xiamen, China Fax: +86-592
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6) Protocol
There are some transmission protocols of serial port data, as below.
UDP (DTU):
Configured as UDP client, which can be connected to UDP server, specified
device number and heartbeat interval is required.
TCP (DTU):
Configured as TCP client, which can be connected to TCP server, specified
device number and heartbeat interval is required.
PURE UDP:
Configured as pure UDP client.
PURE TCP:
Configured as pure TCP client.
TCP Server:
Configured as TCP server.
Customed TCP:
Custom TCP client, it can be format of custom register string, heartbeat
string.
If configured as client, a specified address of server is required.
Server Port:
Port of server.
Heartbeat Interval:
The interval time of heartbeat string sent by client.
Custom Heartbeat String:
Hexadecimal format.
Custom Register String:
Hexadecimal format.
3.5 VPN
VPN is used to establish a virtual private channel, and all the data in this channel will be
encrypted to ensure that data security during transmission.
TR321 support VPN: PPTP, L2TP, OpenVPN and IPSec. PPTP/L2TP are layer 2 VPN,
and OpenVPN is VPN based on SSL, while IPSec layer 3 VPN. PPTP/L2TP are more
convenient to use, while OpenVPN and IPSec is more complex, as they need complex
certification management, meanwhile, they offer more secured encrypted data.
3.5.1 PPTP
You can configure either PPTP client or PPTP server, but not both of them at the same
time, as that may cause uncertain issues.
