ADTRAN solutions maximize performance, lower costs, and help companies achieve the best return on investment. ADTRAN is committed to achieving success for customers by offering "best-in-class" products with outstanding value. Let ADTRAN work for you.PRODUCT FEATURES:System includes an ATLAS 550 and an NxT1 HSSI/V.35 Module;Provides four T1 interfaces and a single HSSI/V.35 interface;Supports point-to-point applications only;T1 ports on the NxT1 HSSI/V.35 Module can only be used to direct bandwidth to the HSSI/V.35 interface;V.35 DTE interface supported with NxT1 V.35 Adapter Cable (1200763L1).