Exhibit 99.23

             Avocent Commences Tender for LANDesk Shares

    HUNTSVILLE, Ala.--(BUSINESS WIRE)--Aug. 24, 2006--Avocent
Corporation (NASDAQ:AVCT) announced today it has commenced its
acquisition tender offer to all shareholders of LANDesk Group Ltd.
Based on the level of previously committed support from the principal
LANDesk shareholders, Avocent expects to complete its initial closing
of the acquisition of LANDesk shares on August 31, 2006. The tender
offer follows the ruling by the California Department of Corporations
today that Avocent's acquisition offer is fair to LANDesk
shareholders.
    "The California fairness hearing was the last regulatory approval
required before we could proceed with closing the LANDesk
acquisition," stated John R. Cooper, Avocent's chairman and chief
executive officer. "We are excited about the immediate diversification
of our revenue this acquisition provides and look forward to pursuing
the opportunities for future product development."

    About Avocent Corporation

    Avocent Corporation is the leading supplier of connectivity
solutions for enterprise data centers, branch offices, and small to
medium size businesses worldwide. Branded and OEM products include
remote and local access solutions for switching, serial console, power
extension, intelligent platform management interface (IPMI), mobile
and video display management solutions. Additional information is
available at: www.avocent.com.

    Forward-Looking Statements

    This press release contains statements that are forward-looking
statements as defined within the Private Securities Litigation Reform
Act of 1995. These include statements regarding the likelihood and
timing of the acquisition and the expected closing of LANDesk. These
forward-looking statements are subject to risks and uncertainties that
could cause actual results to differ materially from the statements
made, including the risks associated with the closing of the LANDesk
transaction and acquisition and subsequent integration the LANDesk
businesses and technologies general economic conditions, risks
attributable to future product demand, sales, and expenses, risks
associated with acquisitions and acquisition integration, risks
associated with product design efforts and the introduction of new
products and technologies, and risks associated with obtaining and
protecting intellectual property rights. Other factors that could
cause operating and financial results to differ are described in our
annual report on Form 10-K filed with the Securities and Exchange
Commission on March 6, 2006 and our quarterly report on Form 10-Q
filed with the SEC on August 4, 2006. Other risks may be detailed from
time to time in reports to be filed with the SEC. Avocent does not
undertake any obligation to publicly update its forward-looking
statements based on events or circumstances after the date hereof.

    CONTACT: Avocent Corporation
             Edward H. Blankenship, 256-217-1301