![]() ![]() Such alternate mark inversion (AMI) is designed to ensure that the receiving device properly synchronizes and determines when the binary ones and zeros arrive. Digital systems alternate the polarity of each successive binary one to ensure a sufficient amount of voltage transitions. To understand DS-3 and E3 errors, you first need to understand line coding, which is explained here.Įach binary one or zero on a digital link represents an electrical pulse. Conventionsįor more information on document conventions, refer to the Cisco Technical Tips Conventions. This document is not restricted to specific software and hardware versions. There are no specific requirements for this document. Non-zero values indicate a problem with the physical wire between this router interface and another network device, typically an Add-Drop Multiplexer (ADM) or an ATM switch. The show controllers atm command displays any active alarms and non-zero error counters, referred to in the output as facility statistics. ![]() ![]() This document provides troubleshooting tips for ATM over digital signal level 3 (DS-3) and E3 router interfaces. ![]()
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January 2023
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