After much testing and log review I finally figured this out. I previously tried creating a non-blocking shell, and then writing to the shell, but was getting the same result as the above code. From looking through logs on CUCM I did notice that the script was creating tty=unknown shell. After setting the tty (->pty(1)), I was finally able to work everything out. 

my $channel = $ssh2->channel();
$channel->blocking(0); 
$channel->pty(1);      #set tty
$channel->shell();     

sleep 10;   #required as the CUCM CLI is slow to start

$channel->write("show account\n");
sleep 5;    #Again the CLI is kind of slow

my $output;
$channel->read($output,128);
print "Account details:\n $output\n";

[download]

In reply to Re: ssh2 channel/exec issue by armcinto
in thread ssh2 channel/exec issue by armcinto

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.