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Avocent/Cybex KVM Cable Pinouts

Avocent markets a variety of Keyboard-Video-Mouse (KVM) switchboxes. Most of these switches use cables which have a DB25 female connector on the switch end and break-out to appropriate keyboard, video, and mouse connectors at the other. This makes for neat patching at the switchbox and tidy cable runs, but the proprietary pinout of the DB25 limits you to using Avocent's own cables.

Standard KVM cables of excellent quality are available for surprisingly little expense from a variety of sources (eBay is a personal favorite of mine). Using the reverse-engineered pinouts shown below it is fairly easy make your own custom cables. Currently only PC pinouts are provided, but other platforms may be added in the future (contributions welcome!).

Available Pinouts

  • [1] Pinout of the DB25F connector itself
  • [2] PC PS/2 keyboard, PS/2 mouse, and HD-DB15 video cable

    Pinout 1: The DB25F connector itself

    Incomplete

    Pinout 2: PC PS/2 keyboard, PS/2 mouse, and HD-DB15 video cable

    This cable will connect an Avocent/Cybex KVM to a standard PC using PS/2 Keyboard and Mouse connectors and a HD-DB15 SVGA video connector.

    Tested On: Unknown.

    KVM
    DB25 Female
    		 Dir
         		 Keyboard
    MiniDIN-6 Male
    		 Mouse
    MiniDIN-6 Male
    		 Video
    HD-DB15 Male
    		 Function
     
    1 3 BLUE
    2 2 GREEN
    3 1 RED
    4 13 HSYNC
    5 11 ID0
    6 15 ID3
    7 10 SGND
    8
    9 1 KBD DATA
    10 3 GND
    11 5 MSE CLK
    12 1 MSE DATA
    13 4 +5VDC
    14 8 BGND
    15 7 GGND
    16 6 RGND
    17 14 VSYNC
    18 4 ID2
    19 12 ID1
    20 5 GND
    21 3 GND
    22 5 KBD CLK
    23
    24
    25 4 +5VDC

    Pinout 3: PC XT keyboard, Serial mouse, and HD-DB15 video cable

    This cable will connect an Avocent/Cybex KVM to a standard PC using an XT Keyboard, Serial Mouse, and a HD-DB15 SVGA video connector.

    Tested On: Unknown.

    Incomplete

    Changelog

    9/30/2004: Initial revision.

    Feel free to send questions and comments to me at     akropel1@rochester.rr.com.

    This page is not associated with or endorsed by Avocent/Cybex in any way.

    Copyright (c) 2004 by Adam Kropelin, All Rights Reserved.