Bandwidth Calculator

Sizing for cameras, SIP and paging

Cameras

3 Mbps / cam

Audio / SIP / Paging

Other & headroom

LAN load (switch / VLAN)

Recording → NVR
24.00 Mbps
Sub-stream / live
3.60 Mbps
SIP + paging
0.174 Mbps
Total LAN peak
27.77 Mbps

WAN / Internet sizing

Upload required
8.17 Mbps
Download required
1.17 Mbps
Upload + 30%
10.63 Mbps
Download + 30%
1.53 Mbps

Recommended circuit: 25/25 Mbps symmetrical. Estimated egress if all remote streams run 24/7: 9720 GB / month.

Notes

  • Camera bitrates are average (CBR estimate). Actual VBR peaks can be 1.5–2× higher in motion.
  • Paging is multicast — bandwidth is constant whether 1 or 100 speakers, but IGMP snooping must be on.
  • SIP signalling itself is negligible (~1 kbps); the numbers shown are RTP audio with overhead.
  • Always size the WAN with headroom for backup, OS updates and tech remote sessions.