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Resolution of Network Switch Failures
The Phase-1 telecom network of KMRL relies on COMNET-manufactured industrial
switches installed at outdoor locations to maintain critical connectivity between various
telecom system endpoints. After exceeding their Defect Liability Period (DLP), these
hardened switches have exhibited progressive operational failures, with 20 units
becoming completely non-functional - posing potential network reliability concerns.
Initial attempts at conventional repair through multiple electronic board service vendors
proved unsuccessful in restoring functionality, indicating a complex underlying
technical issue.
The COM technical team initiated a comprehensive failure analysis, conducting
meticulous component-level diagnostics on the faulty switches. Through systematic
testing, engineers isolated the failure root cause to degraded power supply modules,
specifically identifying capacitor aging and voltage regulator malfunctions as primary
failure modes. Applying specialized repair techniques, the team successfully
refurbished three switches. These repaired units have demonstrated exceptional field
performance over six months of continuous operation.
