Exhibit 23.2
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We have issued our report dated August 19, 2005 accompanying the consolidated financial statements
and schedule of ACE*COMM Corporation appearing in Annual Report on Form 10-K/A for the year ended
June 30, 2005 which is incorporated by reference in this Registration Statement. We consent to the
incorporation by reference in the Registration Statement of the aforementioned report and to the
use of our name as it appears under the caption Experts.
/s/ Grant Thornton LLP
Vienna, Virginia
March 29, 2006