Solutions
Security NVR timing: cabinet NTP, or IRIG/OCXO?
Cameras, NVRs, and access platforms need consistent timestamps for correlation and search. Cabinet GNSS NTP keeps the reference inside your control boundary and cuts drift—usually a single LAN port is enough without hardware-stamp or OCXO upgrades.
Primary: SY-1231
Fit Campus or building security subnets, NVR search, and access-event correlation.
Not for Broadcast/power time-code matrices that mandate IRIG; or plant multi-port tenders (8640 roadmap).
Acceptance facts
- Cameras, NVRs, and access panels usually need one LAN timestamp; SY-1231 single-port NTP covers typical scale.
- OCXO or IRIG-B is usually unnecessary. Choose coming 4096 only if the recorder/matrix requires IRIG, or the edge cabinet needs stamp+holdover.
- Keeping the source in the weak-current cabinet cuts cross-device drift and avoids firewalled public NTP.
Cite these sources
FAQ
- Do NVRs need OCXO holdover?
- Most security subnets do not. Prove GNSS LOCK and UDP 123 first. Treat short unlock as an alarm—do not accept against unlocked accuracy.
- Primary model?
- Primary: SY-1231. Specify coming SY-4096 only when IRIG-B is required.