This excerpt taken from the ARBX 10-K filed Mar 17, 2008.
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the Arbinet-thexchange, Inc. Registration Statement (Form S-8 No. 333-125550), pertaining to the stock incentive plans of Arbinet-thexchange, Inc., of our reports dated March 14, 2008, with respect to the consolidated financial statements and schedule of Arbinet-thexchange, Inc., and the effectiveness of internal control over financial reporting of Arbinet-thexchange, Inc., included in this Form 10-K for the year ended December 31, 2007.
/s/ Ernst & Young LLP
Iselin, New Jersey
March 14, 2008