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Serial Management 'PC' / 'Null Modem' Adapter Pinouts

  • 1.  Serial Management 'PC' / 'Null Modem' Adapter Pinouts

    Posted 11-20-2013 12:15
    Article ID: 5301

    Related to
    PC adapter
    Null Modem adapter

    Goals
    PC adapter pinout
    Console pinout
    Construct a PC adapter
    Construct a null modem adapter
    Serial management via console port

    Solution

    * RJ45 console port *

    To construct a 'PC adapter' for serial management of most Cabletron/Enterasys devices having an RJ45 console port, the desired pinout is:
    RJ45 DB9 Conductor
    1 Tx 2 Rx Blue
    4 Rx 3 Tx Red
    5 GND 5 GND Green
    2 DSR 7 RTS Orange
    6 DTR 8 CTS Yellow[/code]The hookup between the PC's DB9 COM port and a device's RJ45 Console port would be:
    COM port => PC adapter => RJ45 straight-through cable => Console port.

    The adapter p/n 6380041, bundled into DB9 console kit 9372038 and RJ45 console kit 9372065, is gray and T-shaped, with a white sticker labeled "PC".
    These parts are referenced in 3377.

    If the sticker is missing, it probably has a different pinout, unless its a "home grown" adapter that was never labeled.

    See 5130, for the procedure utilizing this part.

    * DB9 console port requiring Null Modem cable *

    To construct a 'Null Modem adapter' for serial management of Cabletron/Enterasys XSR, Vertical Horizon, ELS100-24TX(M,G), SecureStack, Matrix V2, and RoamAbout R2/AP2000 equipment, the desired pinout is:
    RJ45 DB9 Conductor
    1 Tx 3 Rx Blue
    4 Rx 2 Tx Red
    5 GND 5 GND Green
    2 DSR 8 RTS Orange
    6 DTR 7 CTS Yellow[/code]The hookup between the PC's DB9 COM port and a device's DB9 Console port would be:
    COM port => PC adapter => RJ45 straight-through cable => Null Modem adapter=> Console port.