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Problem: Bad Ethernet Cable

A bad or noisy Ethernet cable can cause high rates of corrupted packets. This results in high rates of FCS and Alignment errors being reported by network interface cards or analyzers.

High rates of frame error can often be caused by Duplex Mismatch.

Late collisions are symptomatic of an excessively long Ethernet segment resulting in too much delay which impacts the collision detection process.


A high rate of packet loss causes continuous degradation in call quality throughout a call.


This class of problem often results in a sustained high packet loss rate without a corresponding high level of jitter.

Replace or reroute bad Ethernet cables. Resolve Duplex Mismatch by configuring both Ethernet Interfaces to full duplex.


Network Analyzer, Switch Statistics, VQmon

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