Bit errors, which may be perceived as InErrors and OutErrors prove most significant. Some manageable systems will not permit one to drill down further into the error state, albeit, some systems allow this action and consequently enhance the troubleshooting process. When these errors surface, one should initially test the cabling channel connected on that port as well as confirm the installation of the latest revision of software on the system and the updated, current status of the firmware calibration. The tester also needs to ensure interfaces and/or patch cords are relatively new. As each implements a limited number of mating cycles, a specific channel may appear to be malfunction when it is performing correctly (VoIP performance testing fundamentals).

The tester also needs to examine duplex configurations as having full duplex links duplex proves vital to performance. Mismatches and/or channels auto-negotiated to half duplex will further limit VoIP operations. Half duplex...
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