| Problem | Likely Cause | Fix | |---------|--------------|-----| | No video stream | IP conflict or firewall | Check ARP table; disable SIP ALG | | Intermittent drop | Insufficient PoE power | Use external PoE injector or higher-watt switch | | Poor night image | IR reflection from housing | Adjust dome bubble or add external IR | | High latency | Network congestion | Create dedicated surveillance VLAN |