Your code is pretty awful, as is your explanation of what you want to do. But as you have put in some effort....

It is hard to know where to begin but I suggest you have a look at New Monks. Here is some code you should be able to get working much easier. It does roughly what you want (I think) 

#!/perl/bin -w
use strict;

# do you opens like this. no hard coded names. $! contains error messa
+ges if
# the open fails so print out perls helpful message

# my $log = "tasco2.log";
# open LOG, $log or die "Can not open $log, Perl says the reason is $!
+\n";

# define model types in a hash lookup table
my %modhash  = ( 9  => "no connect",
                18 => "21000bps",
                20 => "V34",
                28 => "29333bps",
                31 => "33333bps",
                34 => "V90 digital",
                39 => "44000bps",
                40 => "45333bps",
                43 => "49333bps",
                44 => "50666bps",
                45 => "V92 PCM Upstream",
            );
 
my $sessidlast  = 0;
my $newsession  = 0;
my $modtypelast = '';

while (my $line = <DATA> ) {
    chomp $line;
    my @temp = split /\s*=\s*/, $line;
    if ($temp[1] > 100) {
        # we have a session id
        my $sessid = $temp[1];
        do { $newsession = 0; next } if $sessid == $sessidlast;
        $sessidlast = $sessid;
        $newsession = 1;
        print "\n$sessid\t";       
    } else {
        # we have a modtype
      next unless $newsession;  # skip if we don't have a new session
        my $modtype = $temp[1];
      next if $modtype == $modtypelast;
        $modtypelast = $modtype;
        print get_modtype($modtype), "\t";
    }
}

sub get_modtype {
    my $modtype = shift;
    if (defined $modhash{$modtype}) {
        return $modhash{$modtype} . "\t";
    } else {
        return "Unknown modtype $modtype!\t";
    }
}      
__DATA__
x.x.nas.6.9.1.1.40.1001 = 1134468706
x.x.nas.6.9.1.1.14.1001 = 9
x.x.nas.6.9.1.1.13.1001 = 16
x.x.nas.6.9.1.1.12.1001 = 16  
x.x.nas.6.9.1.1.40.1001 = 1134468706
x.x.nas.6.9.1.1.14.1001 = 34
x.x.nas.6.9.1.1.13.1001 = 19
x.x.nas.6.9.1.1.12.1001 = 30
x.x.nas.6.9.1.1.40.1001 = 1134485731
x.x.nas.6.9.1.1.14.1001 = 45
x.x.nas.6.9.1.1.13.1001 = 16
x.x.nas.6.9.1.1.12.1001 = 16
x.x.nas.6.9.1.1.40.1001 = 1134485733
x.x.nas.6.9.1.1.x.x = 9

[download]

cheers

tachyon

s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print

In reply to Re: executing the following lines of a script if the value of an elemnt in an array changes by tachyon
in thread executing the following lines of a script if the value of an elemnt in an array changes by splatohara

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