call started 00:00:00, call ended 00:00:00, total modem active time 00:00:00
##</code><code>##

Modem Line 0/$i : total modem active time 00:00:00
##</code><code>##

#!/usr/sbin/perl -w

# Program for modem pool log manipulation
open(IN, $ARGV[0]) || die "cannot open $ARGV[0] for reading: $!";
open(OUT, ">$ARGV[1]") || die "cannot create $ARGV[1]: $!";
$i=0;
while(<IN>){
  if(/^call started/){
        print OUT s/^call.*total/Modem Line 0\/$i : / ."\n";
        $i++;
        }
}
close(IN);
close(OUT);