Wisenet NVR Bandwidth Guide
Created by: SungHwan Kim (sunghwan.k@hanwha.com)
Created time: March 2025
Last edited time: September 2025
Product Category: NVR
Resolution Status:
ZD KB Article URL: here
Applies to All Wisenet NVR Models (Example model is XRN-6420B2 in this guide).
This document provides a structured technical overview of bandwidth parameters in Wisenet NVRs. Bandwidth is categorized into Receiving, Recording, Playback, and Transmission, each directly impacting live monitoring, recording performance, playback capacity, and remote access capabilities.
All explanations are illustrated using the XRN-6420B2 model as a representative example.
(Refer to the attached datasheet of XRN-6420B2)
1. Receiving Bandwidth
Wisenet NVRs process incoming video streams from connected cameras within a defined receiving bandwidth. The Receiving Bandwidth is the same as the Recording Bandwidth.
As long as incoming streams are within this limit, live monitoring operates based on local decoding performance, independent of transmission or playback bandwidth.
1-1) Local Decoding Performance (Set UI) * Set UI means HDMI UI in local.
The number of live video channels supported locally depends on the decoding capacity of the specific NVR model.
For example, the XRN-6420B2 supports:
XRN-6420B2 Decoding Performance (Resolution)
- 32MP: 1 channel @ 15fps (H.265 only)
- 12MP: 1 channel @ 30fps (H.265 only)
- 8.3MP: 4 channels @ 30fps
- 1080p: 16 channels @ 30fps
- 720p: 32 channels @ 30fps
- D1: 64 channels @ 30fps
2. Recording Bandwidth
Recording bandwidth refers to the maximum throughput at which the NVR can store incoming video streams to internal or external storage.
XRN-6420B2 Recording Specification:
- Distributed Mode: Up to 520 Mbps
- Normal Mode: Up to 300 Mbps
3. Playback Bandwidth
3-1) Overview
Playback bandwidth defines how many channels can be viewed simultaneously during playback. It is independent of recording bandwidth.
XRN-6420B2 Playback Specification:
- Maximum Playback Bandwidth: 200 Mbps
- Simultaneous Playback: Up to 112 channels (Up to 64 local, 16 per remote user)
3-2) Key Notes
A. Bandwidth is prioritized over channel count.
→ If the playback bandwidth is exceeded, channels may fall back to I-frame only playback.
B. Resolution limitations apply depending on the decoding capacity.
C. Local and remote playback channel counts are managed separately.
D. Exceeding remote playback limits may result in failure to connect or display the stream.
E. Remote Playback Limits
- Wisenet Viewer or VMS: Up to 16 channels per user
- WebViewer (Web UI): Limited to 1 channel only
- Maximum remote playback users: 3
→ Thus, up to 48 channels total can be played back remotely (16CH × 3 users)
4. Transmission Bandwidth
Transmission bandwidth refers to the NVR’s ability to stream video to remote clients for live monitoring. This is separate from recording bandwidth.
XRN-6420B2 Transmission Specification:
- Max Transmission Bandwidth: 520 Mbps
- Remote Live Monitoring Limits Up to 10 users can access live streams concurrently
- Each user can view up to 16 channels
→ This allows for up to 160 live channels simultaneously (16CH × 10 users)
※ RTSP Session ID Policy
When using RTSP-based streaming for live view or playback, all requested channels from a single client must share the same session ID.If session IDs are missing or mismatched, the system considers them separate users, which affects both user count and channel limit enforcement.
※ Even when recording bandwidth is fully consumed, remote live viewing and playback will function normally if within the transmission & playback bandwidth limit.