As discussed earlier in the testing of referenced attachments, check the port number of your runtime for each test case if you receive an exception stating that the endpoint URL is incorrect.

根据之前讨论的引用附件测试，如果收到表示终端url不正确的异常，检查每个测试用例运行时的端口号。

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The server can then send a datagram to the address and port for the client to receive, as shown in Listing 5.

服务器可以向特定地址和端口发送数据报，供客户端接收，如清单5所示。

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It indicates that the device is in its idle state, ready to receive characters on the RS232 port.

这表明该装置是在其空闲状态，准备接收的RS 232端口字符。

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