On January 8, 2016, Ciena Corporation, Ciena Communications, Inc., Ciena Government Solutions, Inc., and Ciena Canada, Inc., entered into a Sixth Amendment to Credit Agreement by and among the Borrowers, the lenders party thereto and Deutsche Bank AG New York Branch, as administrative agent and collateral agent, which amends the ABL Credit Agreement, dated August 13, 2012, by and among the Borrowers, the lenders party thereto and the ABL Agent. The Sixth Amendment, among other things: increases the total commitment under the ABL Credit Agreement from $200 million to $250 million, of which $200 million is available for issuances of letters of credit; expands the accordion" feature to provide Ciena with the option to further increase the total commitment under the ABL Credit Agreement from $250 million to $325 million, subject to certain customary conditions being met; extends the maturity date of the ABL Credit Agreement from December 31, 2016 to December 31, 2020, but provides for an accelerated maturity in the event that Ciena and its subsidiaries are unable to satisfy a minimum liquidity test 90 days prior to the maturity date of any debt equal to $100 million or greater; reduces the minimum aggregate amount of unrestricted cash and cash equivalents that Ciena and its domestic subsidiaries are required to maintain at all times from $150 million to $100 million; and reduces the interest rate by 25 basis points on borrowings under the ABL Credit Agreement to either (a) LIBOR plus a margin ranging from 125 to 175 basis points (instead of the previous 150 to 200 basis points) or (b) a base rate plus a margin ranging from 25 to 75 basis points (instead of the previous 50 to 100 basis points), in each case with the actual margin determined according to the Borrower's utilization of the facility.