use warnings;
use Net::Telnet;

my $Telnet = new Net::Telnet;
my $InHandle = $Telnet->input_log("input.txt");
my $OutHandle = $Telnet->output_log("output.txt");
my $prmpt = '/[\w().-]*[\$#>:.]\s?(?:\(>\))?\s*$/';

$host="172.16.1.1";
$username = "user";
$password = "pass";
$enpwd = "enable";

my $telnet = Net::Telnet->new(
Host => $host,
Input_log => "input.log",
Output_log => "output.log",
Dump_Log => "dump.log",
Timeout => 10);

# provide host address
$telnet->open("$host");
print "\n\n Connecting to $host\n";

# authentication
@out = $telnet->waitfor('/Username: $/i') || next;
$telnet->print($username);
print "@out\n";    # for tshoot only
@out = $telnet->waitfor('/Password: $/i') || next;
$telnet->print($password);
print "@out\n";    # for tshoot only

# if enable, send "enable" and enable-pwd
unless ($telnet->waitfor('/Username: $/i' | '/#/i'))
{
#$telnet->waitfor('/>/');
@out = $telnet->print('enable');
print "@out\n";    # for tshoot only
@out = $telnet->print($enpwd);
print "@out\n";    # for tshoot only
}
print "username, password, & enable mode authentication accepted-\n";
$telnet->close;
##</code><code>##

 Connecting to 172.16.1.1
1
1
pattern match timed-out at c:\temp\dirB2D.tmp\testing 3.pl line 35

Press any key to continue . . .

 Connecting to 172.16.1.2
pattern match timed-out at c:\temp\dirEDA1.tmp\testing 3.pl line 26

Press any key to continue . . .