Several wiring layouts are in use, because the null modem connection is not covered by a standard.
有多种连接方式可供选择，因为标准中并未涵盖零调制解调器连接。
The system level error includes syntactical error, null pointer exception, web service timeout, database connection timeout, and so on.
系统级错误包括语法错误、空指针异常、web服务超时、数据库连接超时等。
Use any (non-null) value for user ID and password, and click the Test Connection button.
使用任意（非空）值作为用户ID和密码，并单击TestConnection按钮。
When you use a null modem to make a direct serial connection between two computers, your cable must be wired, as shown in Listing 1 below.
当您使用零调制解调器电缆在两台计算机之间建立直接串行连接时，您的电缆必须按下面清单1中显示的方式连接。
With a null modem connection, the transmit and receive lines are cross-linked.
使用零调制解调器连接时，发送线和接收线要交叉连接。
If you set link to null, a new database connection is created.
如果将link设为null，就会创建一个新的数据库连接。
He mentions AspectJ specifically in "The Null Flag bug pattern" in connection with exceptions.
他在与异常有关的“The NullFlagbugpattern”中特别提到了AspectJ。
Use a null modem cable to connect the two nodes through their serial ports. Now test the serial connection, as follows.
通过两个节点的串口，使用一根直连线缆将它们连接起来。
In this way you can emulate virtual null-modem cable connection.
这种方式，您可以学习的虚拟空调制解调器电缆连接。
In this way you can emulate virtual null-modem cable connection.
这种方式，您可以学习的虚拟空调制解调器电缆连接。
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