The 5G Troubleshooting Guide: All 14 Modules in One Place
This 5G troubleshooting guide collects all 14 modules of the course on one page, in the order they are meant to be read, with a symptom index for engineers who…[...]
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Introduction to 5G: The Complete 14-Module Course
This introduction to 5G course takes you from why 5G exists to how a 5G network moves a session between cells, in 14 modules that each fit in a single…[...]
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5G Troubleshooting — Module 14: NAS Congestion Control and AMF Overload
NAS congestion control is the one fault class in this entire course that isn't actually a fault. Every other module has covered something breaking — a misconfiguration, a drifted clock,…[...]
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5G Troubleshooting — Module 13: N4/PFCP Session Failures
An N4 PFCP session failure is the fault class this course has been building toward without naming directly: every prior module assumed that once RRC connects and NAS registration succeeds,…[...]
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5G Troubleshooting — Module 12: Timing and Synchronization Faults
5G timing synchronization troubleshooting starts from an uncomfortable fact: the fault is almost never in the radio, and it almost always gets chased there first. A clock problem two hops…[...]
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5G Troubleshooting — Module 11: NR-DC and NE-DC Dual Connectivity
NR-DC troubleshooting starts from an assumption Module 8 made and this module removes: that the master node is LTE and the secondary node is NR. In EN-DC that is always…[...]
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5G Troubleshooting — Module 10: RedCap Device Failures
5G RedCap troubleshooting breaks a habit every other module in this course relies on: comparing the failing device against a working one on the same cell. With RedCap that comparison…[...]
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5G Troubleshooting — Module 9: Inter-PLMN and Roaming Failures
A 5G roaming failure is the one fault class in this course where half the network you are diagnosing does not belong to you. Every module so far has assumed…[...]
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5G Troubleshooting — Module 8: EN-DC and SCG Failure
An EN-DC SCG failure is the only fault in this course where everything works and the customer is still right to complain. The NR leg fails, the LTE anchor holds…[...]
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5G Troubleshooting — Module 7: Handover Failures in SA and NSA
A 5G handover failure is the fault class that punishes aggregate thinking. A cell showing a 98 percent handover success rate can be losing every third session on one neighbor…[...]
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