Do not use cross cables that are sold in some computer stores. In this picture flat cable is used, which is specially designed for use with RJ45 connectors. The basic layout of this cable is shown below. This cable is not a straight through patch cable with two RJ45 connectors crimped to each end, but a cross-cable where pin 1 is connected to pin 8, pin 2 to 7 etc. One cable for all solutions is the basis of the Yost standard. Therefore the Yost standard can be used with much more equipment than DECConnect. Because RJ45 connectors are used, eight pins are available which makes it possible to transfer almost all RS232 signals. The Yost standard has however one basic advantage. These goals are very close to the goals DEC wanted to achieve with DECConnect. No need for null modems or other special cables for specific situations.All cables should be identical (except for length).DTEs and DCEs should have the same connector wiring.
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