I just found and tried this code, still no luck. It still takes 20 to 30 seconds to regain control. From Chapter 18. The UDP Protocol, in "Network Programming with Perl".

eval {
    local $SIG{ALRM} = sub { die "timeout\n" };
    alarm(2);
    $t = new Net::Telnet (Host       => $host,
                          Port       => $port,
                          Timeout    => 1,
                          Prompt     => '/Escape character is.+\n/',
                          Rs         => ' ',
                          Ors        => '',
                          Binmode    => 1,
                          Telnetmode => 1,
                          Errmode    => 'return');
    alarm(0);
};
if ($@) {
    die $@ unless $@ eq "timeout\n";
    warn "Timed out!\n";
}

[download]

In reply to Re^3: Timeout parameter for Net::Telnet under Windows by SwaJime
in thread Timeout parameter for Net::Telnet under Windows by SwaJime

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.