sub GetConfig
{
    my $telnet=new Net::Telnet();
    $telnet->output_log;

    $telnet->timeout($login_timeout);
    $telnet->errmode('return');
    $telnet->prompt('/[\$#>]/');

    $telnet->open( $deviceIP );

    if( $telnet->errmsg )
    {
        $msg = "Error connecting to device:  ".$telnet->errmsg;
        $telnet->close;
        return( 252, $msg );
    }

    #first try login without username and just password
    $telnet->waitfor( Match => '/Password:/');
    if( $telnet->errmsg )
    {
        $telnet->login($user, $pass);
        if( $telnet->errmsg )
        {
            $msg = $telnet->errmsg;
            $telnet->close;
            return( 251, $msg );
        }
    }
    else
    {
        $telnet->cmd( $pass );
        if( $telnet->errmsg )
        {
            # can't use errmsg as it will give command timed-out
            # and we should really indicate bad password
            $msg = "login failed: bad password";
            $telnet->close;
            return( 251, $msg );
        }
    }