N42B3P2 - Video recorder Dahua Technology - Free user manual and instructions
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| Product Type | Network Video Recorder (NVR) |
| Model | N42B3P2 |
| Brand | Dahua Technology |
| Channels | 4 channels |
| Hard Drive Bays | 2 SATA III (up to 10TB each) |
| Video Compression | H.265+/H.265/H.264+/H.264 |
| Recording Resolution | Up to 8MP (4K) |
| Audio Support | 1ch RCA input, 1ch RCA output |
| Network Interface | 1 RJ45 10/100/1000 Mbps |
| USB Ports | 2 USB 2.0, 1 USB 3.0 |
| HDMI Output | 1 HDMI 1.4 (up to 1920x1080) |
| VGA Output | 1 VGA (up to 1920x1080) |
| Power Supply | DC 12V, 2A |
| Power Consumption | ≤ 10W (without HDD) |
| Dimensions (W x D x H) | 260 x 230 x 45 mm |
| Weight | 1.0 kg (without HDD) |
| Operating Temperature | -10°C to +55°C |
| Main Functions | Remote viewing, motion detection, alarm I/O, smart search, backup via USB |
| Maintenance | Clean with dry cloth; keep vents clear |
| Safety | Overvoltage protection, short circuit protection |
| Spare Parts & Repairability | HDD and power adapter replaceable; no user-serviceable internal parts |
| General Information | Compatible with Dahua IP cameras; supports ONVIF |
Frequently Asked Questions - N42B3P2 Dahua Technology
How do I install the hard drive in the N42B3P2?
Open the top cover, slide the HDD into the bay, secure with screws, and connect the SATA cable. Make sure the power is off.
Can I use any IP camera with this NVR?
The N42B3P2 supports standard ONVIF cameras and Dahua IP cameras. Third-party cameras may require manual configuration.
How do I set up remote viewing?
Connect the NVR to your router via Ethernet. Enable P2P in network settings and use the DMSS app (Dahua) or a web browser with the provided DDNS address.
What is the maximum storage capacity?
Each of the two SATA bays supports up to 10TB, for a total of 20TB. Use surveillance-grade hard drives for reliability.
How do I perform a factory reset?
Press and hold the reset button (small hole on the back) for 10 seconds with power on. Alternatively, use the web interface under System > Maintenance.
Does the NVR support H.265 compression?
Yes, it supports H.265+ and H.265, which reduce bandwidth and storage usage compared to H.264.
Can I view recordings on a smartphone?
Yes, download the DMSS app (iOS/Android), add your NVR by scanning the QR code on the device, and you can view live and recorded video.
What should I do if the NVR is not detecting cameras?
Check that cameras are powered and on the same network. Go to Camera > Registration in the NVR menu and search for devices. Ensure IP addresses are in the same subnet.
Is the NVR compatible with PoE cameras?
The N42B3P2 does not have built-in PoE ports. You need to connect cameras to a PoE switch or use separate power adapters.
How do I upgrade the firmware?
Download the latest firmware from Dahua's website. Copy the .bin file to a USB drive, insert it into the NVR, and go to System > Upgrade to update.
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