Comtech Telecommunications Corp. disclosed In a regulatory filing with the Securities and Exchange Commission, that it is under investigation by the Office of Foreign Assets Control of the US Department of the Treasury. The Company said that it reported to OFAC in October 2014 that a shipment of modems sent to a Canadian customer had been incorporated into a communication system ultimately used by the Sudan Civil Aviation Authority. Since then, Comtech reports that it has responded to two OFAC administrative subpoenas, and reported additional potential violations of the Sudan Sanction Regulations. In September 2018 the company entered into a tolling agreement with OFAC, extending the statute of limitations to December 2019. Comtech noted that in light of the 2017 revocation of the Sudan Sanctions Regulations, the company cannot predict whether OFAC will take enforcement action against it.