Controlling jitter in E1 and T1 lines is required for maintaining the reliability, accuracy, and quality of digital communication ensuring proper synchronization, data integrity, and performance in timing, voice and data applications.

One-Way Delay test is important for verifying IEEE C37.94-compliant teleprotection systems because it directly assesses critical aspects such as timing, fault response, coordination, compliance with standards, and overall network reliability.

Round Trip Delay test over C37.94 is critical in teleprotection applications, where timely and accurate message communication is essential for the proper operation of protective relays and the quality of the power service.