Dear Monks

I am not able to login onto DSL Switch using perl code, Same script on other switch from other vendors is successful without any issues. From past 2 weeks I am re-writing the code in different ways but no success. Seems like the Telnet server based on the VxWorks Target is having minute details that I am not able to understand. Please help me to solve this puzzle.

use IO::Socket;

#============Main===============
my $sock;
$sock=login_router();
print $sock;
exit;
#============End===============

sub login_router {
       my $socket;
          $socket = new IO::Socket::INET (PeerAddr => "192.168.1.240",
+ PeerPort => "23" , Proto => 'tcp') ;
        if ($socket) {
              print "Connection is established\n";
            } 
            else 
            {
            die "Error: $!"; 
            }
    
    sleep(4);
       $socket->autoflush();    
    
    my $input = "";
    my $char = "";
    until ($input =~ /Login :/){
       $socket->sysread($char, 1);
       $input .= $char;
    }
    print $input;
    
    # Write the login name
    syswrite $socket, "ecidslam\r\n";
    
    sleep(2);
    # Wait for the Password prompt
    my $input = "";
    my $char = "";
    until ($input =~ /Password :/){
       $socket->sysread($char, 1);
       $input .= $char;
    }
    print $input;
    syswrite $socket, "Hi-FOCuS\r\n";
    
    # To read the output from the socket
    while(<$socket>)
    {
      last if (/welcome/);
      die "Exit... Login error\n" if (/Permission Denied/);
      
      # Print each line read from socket
      print $_;
    }
     
    return $socket;

}
[download]

On Executing Perl code following is the trace

 C:\Perl>perl login.pl
Connection is established

VxWorks vxTarget

Login : v? ²? ¦?am
Password :********
Exit... Login error
[download]

Login using hyperterminal

Manual login onto the DSL Swith will have following trace

VxWorks vxTarget

Login :ecidslam
Password :********
Welcome

IPNI >
[download]