This seems like it is begging for a schwartzian transform. 
    my %engr_scale = (
        k => 10**3,
        m => 10**6,
        g => 10**9,
        t => 10**12,
    );

    sub normalized_net_speed {
        local $_ = lc shift;
        s/^T1\b/1.544 mbps/i;
        s/^([.0-9]+)\s*([kmgt])bps/ int( $1 * $engr_scale{lc $2} ) /e;
        s/[^.0-9].*$//; # kill non-numeric stuff
        $_
    }

my @sorted =
    map  { $_->[0] }
    sort { $a->[1] <=> $b->[1] }
    map  { [ $_, normalized_net_speed($_) ] }
    @array;

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In reply to Re: How do I write my own sorting routine? by gam3
in thread How do I write my own sorting routine? by Russ

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