User's Manual

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Figure 5-12 UDP Example 4
5.4 TCP Server
When the DTU act as a TCP server, note that:
⚫ The DTU must have a fixed IP address. That is, the wireless DDN private network
service is required.
⚫ The DTU detects link availability by monitoring the wireless side data. If there is no
data from the wireless side in two hours (this interval is fixed in firmware), DTU will
tear down the PPP link and redials.
5.4.1 Parameter Settings
Step 1: See chapter 5.1 Base Configuration.
Step 2: Click “Confgigurations>>Application center”, set special port number for
“Local TCP server port”, as shown in Figure 5-13.