Dropped calls, found in the firewall logs
The network side of a municipal VoIP rollout: a dedicated voice VLAN, WatchGuard rules, and a fault found in the logs.
Four hours down, one bad cable
Racks built and rebuilt to a method, cables cut to length, tagged, and documented, so any fault traces end to end.
Getting signal into a metal building
Got network signal into a metal concrete-plant building where running cable wasn't an option, with a wireless bridge.
Proving WEP wasn't protecting us
Rather than just flag it, I proved our WEP wireless was crackable to make the case for replacing it.
Teaching networking by building it
A three-lab progression I built on my own evenings so students learned networking by building it.