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Xyplex MAXserver 1600 Hardware Installation And Maintenance Manual
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Contents
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Cabling ConsiderationsB.3.2 Device RJ-45 Wiring ConsiderationsYou should give special consideration to the wiring scheme when connecting a device such as a terminalto a MAXserver serial port. The MAXserver is considered a DTE device. If you want to connect toanother DTE device such as a terminal that is also DTE, you will need a crossover wiring schemesomewhere in the cabling. (Communication between DTE-to-DTE devices requires a crossover.) When aDCE device is connected to a MAXserver serial port, straight-through wiring is required.To make a modular cable with a crossover, you need only crimp the RJ-45 connector in the same directionat both ends. This crosses all wires in the cable. To make a modular straight-through cable, you needonly crimp the RJ-45 connector in opposite directions at both ends. Figure B-2 shows the crossover andstraight-through wiring schemes.The crossover connects the MAXserver transmit data (XMT) line to the receive data (RCV) line of theuser DTE device. Similarly, the MAXserver receive data (RCV) line crosses over to the transmit data(XMT) line of the user DTE device. The other signals are crossed over in a similar manner (see Figure B-4).Straight Through CableCrossover CableRJ-45ConnectorsRJ-45ConnectorsFigure B-2. Crossover and Straight-through Wiring Schemes48 0590 |
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