OPNET Technologies, Inc. Schedules Fiscal 2012 Second Quarter Results Teleconference/Webcast
for Wednesday, November 9, 2011

BETHESDA, MD – October 6, 2011 -- OPNET Technologies, Inc. (NASDAQ: OPNT) will hold an investor conference call on Wednesday, November 9 at 5:00 pm Eastern Time to review financial results for the second quarter of fiscal 2012.

To listen to the OPNET investor conference call:

• Call 877-377-7550 in the U.S. or 408-337-0151 for international callers, or
• Use the webcast at www.opnet.com/news.  Investors are advised to go to the web site at least 15 minutes early to register, download, and install any necessary audio software.

To listen to the archived call:

• Call the replay phone number at 855-859-2056 or 404-537-3406 for international callers. For replay, enter passcode # 17171385. The replay will be available from 8:00 pm Eastern Time November 9, 2011 through 11:59 pm Eastern Time November 16, 2011.
• The webcast will be available at www.opnet.com/news, archived for seven days.

The second quarter of fiscal 2012 financial results will be released after the market closes on Wednesday, November 9, 2011.

About OPNET Technologies, Inc.
Founded in 1986, OPNET Technologies, Inc. (NASDAQ:OPNT) is a leading provider of high definition application and network performance management solutions for IT service assurance. For more information about OPNET and its products, please visit www.opnet.com.

###

OPNET and OPNET Technologies, Inc. are trademarks of OPNET Technologies, Inc. All other trademarks are the property of their respective owners.