It worked for years previously. It got more and more unstable to the point I can't work at all once I take a call, it power cycles. I used chatgpt to summarize: **Meraki Z-series keeps power cycling at home, stable at office — extensive troubleshooting done, need insight** I’m dealing with a really strange problem I can’t pin down. - **Hardware swapped:** - I’ve tested **multiple brand-new Meraki Z-series units** (not just one). - I’ve also replaced the **54 V OEM power brick multiple times**. - All new gear → same behavior at my house. - These same units/adapters run perfectly stable when tested at my office. - **Symptom:** - At home, the Meraki will **randomly power cycle**, but most often **during Teams/VoIP calls** or other real-time traffic. - At idle, it can sit on without issue. - When it reboots, my other network gear (Eero Wi-Fi, ISP fiber ONT) stays up — so it’s not an Internet outage. - **Power testing:** - Plugged directly into wall outlets → same behavior. - Put it behind a **CyberPower LE1000DG simulated sine UPS**. Still rebooted. - Even tested with the UPS **unplugged, running only on battery**, to rule out my house wiring. Still rebooted. - House outlet testers show “correct,” but I know I’ve got some grounding/neutral quirks. - **What I suspect:** 1. **Simulated sine UPS output** doesn’t play well with Meraki’s Active PFC 54 V brick, especially under load transitions during calls. 2. **Ground/noise feedback via Ethernet from the ONT (fiber ISP)** could be upsetting the Meraki. Even if AC is isolated by UPS battery, the WAN line could still carry ground reference. Thinking about **fiber media converters or Ethernet isolators**. - **Where I’m stuck:** - If it’s waveform: a **pure sine UPS (CyberPower PFCLCD or APC Smart/BR)** should solve it. - If it’s Ethernet feedback: need to isolate the ONT connection. - Not sure which path to pursue first, since I’ve already replaced everything else. Has anyone else seen Merakis randomly reboot only under VoIP/call load? Did a pure sine UPS fix it, or was Ethernet isolation necessary? I'm trying to avoid an electrician coming out at least for the moment, nothing else is giving me any trouble
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