DTE and DCE Equipment
There's one more concept that every network planner should understand: the difference between data terminal equipment (DTE) and data communications equipment or data circuit-terminating equipment (DCE). If you're clear on these two types of network devices, you will avoid a lot of headaches caused by communication failures.
Data can move through a wire in only one direction. When a data link sends and receives signals at the same time, it must use separate wires to send data from the DTE to the DCE, and from the DCE to the DTE. Therefore, a network device uses separate inputs and outputs on the same multipin connector. The specific pin assignment is different in different connection types, but the inputs and outputs are always ...
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