use Net::Telnet;
use Net::Telnet::Options;

# Create Telnet Object
my $t = new Net::Telnet(Dump_log   => 't_dump.txt', 
                        Output_log => 't_input.txt', 
                        Input_log  => 't_output.txt',
                        Errmode    => 'return',
                        Timeout    => '10',  
                        );

# Create Telnet Options Object
my $nto = Net::Telnet::Options->new();

# Accept and deal with incoming TERM TYPE option requests
$nto->acceptDoOption('TTYPE', {'SB' => \&ttype_sb_callback } );

sub ttype_sb_callback
{
   my ($cmd, $subcmd, $data, $pos) = @_;
   my $socket = "23";

   $nto->sendOpt($socket, 'SB', 24, 'IS', 'VT102');
   return ;
}

$t->open($host);
$t->waitfor('/login:/');
$t->print("$username");