The DCE-to-DTE crossover cable will have two different DB-60 interfaces – one marked DTE, and the other marked DCE. The main issue with connecting your serial interfaces in this manner is the fact that one of the devices will need to be configured as DCE in order to provide the timing mechanism required. These cables allow you to simulate a serial WAN connection without requiring a CSU/DSU or similar device.įigure: Connecting the serial ports of two routers using a DCE to DTE crossover cable. If you’re working in your own lab, however, you may be connecting the serial ports of two routers directly using what is known as a DCE-to-DTE crossover cable. Recall that a CSU/DSU usually handles the clocking for a synchronous serial interface. In a real-life network, your serial interfaces will almost certainly be configured as DTE interfaces.
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February 2023
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