Those are some good points, and I'm looking into them. I should have specified that when I said I moved it around, I did not mean in the system itself, but outside (I had to relocate systems so they could be plugged into a UPS). So I can be sure it isn't an IRQ problem.

I am looking into all the other possible hardware problems, but, in the meanwhile, it would help a LOT if I could rule out software and config problems. (It's really hard pursuing this problem on 2 fronts and I'm hoping to narrow it down.) If I could be sure that the function I mentioned will always work, it would help -- or if I knew that the method I'm using in calling the function in Device::SerialPort was unreliable, it would help me a LOT in my troubleshooting.

In the meanwhile, I'm still working on the hardware issue. I'd just like to see if I can rule out the software/config end or find out if there are things I can check there. Thanks.

In reply to Re^2: Problems with Device::SerialPort (Modem Carrier Detection) by HalNineThousand
in thread Problems with Device::SerialPort (Modem Carrier Detection) by HalNineThousand

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.