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    Spacing of the M40e Mounting Holes

    Table 1 specifies the spacing between mounting holes in the chassis’s front support posts and center-mounting brackets. The mounting holes in a front-mount rack’s rails must align with the holes in the front support posts, and the mounting holes in a center-mount rack’s rails must align with the holes in the center-mounting brackets.

    Table 1: Spacing of Holes on M40e Front Support Post and Center-Mounting Bracket

    Router Mounting Rail

    Hole Spacing

    Front support post

    4 U (7 in. or 17.78 cm)

    Center-mounting bracket

    3 U (5.25 in. or 13.33 cm)


    Published: 2010-10-28