Fast SONET/SDH networks are used for all types of critical communication services (data, voice and video). This multitude of services and applications makes it all the more important to ensure the protection of all information being transported.

With SONET/SDH Encryption HC-8544 STM-1/STM-4, the bandwidth available for transmission can be used in full for point-to-point connections. At the same time, maximum cryptographic security is ensured for all types of information, regardless of the applications or services involved. SONET/SDH Encryption HC-8544 STM-1/STM-4 is a completely transparent high-performance system that offers unlimited encryption in full-duplex mode with no loss of performance. The communication keys are replaced at regular intervals with no interruption to ongoing operations.