An NVR supports as many cameras as the lowest of three limits allows: printed channels, PoE ports (cameras beyond them arrive through a switch) and incoming bandwidth. The CASE NVR table as printed, with the 20-channel, 16-port example.
Scene width = distance × sensor width ÷ focal length; pixels per foot = horizontal pixels ÷ scene width. Run it against the DORI levels before choosing 2.8 mm, 4 mm or a motorized varifocal lens, with CASE lens examples.
H.265 needs roughly half the bits of H.264 for the same picture; S+265 reduces the bitrate further on static scenes. What that means for drives, NVR bandwidth, decoding load and third-party platforms, with the one sourced S+265 figure.
Add the spec-sheet maximum of every powered device, keep 20% headroom, and compare the total with the switch’s printed PoE budget, not its port count. Includes the printed budgets of CASE switches and the bt-class PTZ rule.
Add up every camera’s main and sub-stream bitrate, compare the total with the incoming figure printed for the CASE NVR (the AI-on figure if you use AI by NVR), then check the outgoing figure against remote viewing.
The ten items Anabon technical support asks for, how to read the full SKU and firmware from the device, a five-line topology, a precise symptom paragraph, and why requests run through your business account, never the end user.
A field routine for evidence on a CASE NVR: fix the window and clock, find the event with VCA Search, confirm by time, export native plus standard formats, verify, then protect the original with a hash and a log.
When the customer says the app does not connect, work from the recorder outward: online status, P2P registration and device code where used, account and sharing, app and phone network, then the firewall. Eight checks, no open ports.
Milky, glowing or strand-filled night images come from IR bounce, internal fog or webs, not the lens. Here is the diagnosis table, the placement and sealing fixes, and when to spec a turret, white light or PhotonX instead.
A wrong NVR clock produces playback that finds nothing, ONVIF cameras that refuse to log in and exports a lawyer can pick apart. How to set NTP and the time zone, sync every camera to one source, and handle DST.
