Dahua nvr4208-8p User Manual

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4.17.3 Voice
Note
This function is for some series product only.
The audio function is to manage audio files and set schedule play function. It is to realize audio broadcast
activation function.
4.17.3.1.1 File Manage
Here you can add audio file, listen to the audio file, or rename/delete audio file. Here you can also set
audio volume. See Figure 4-170.
Figure 4-170
Click Add button, you can add audio file and import the audio file via the USB device. The audio file
format shall be MP3 or PCM. See Figure 4-171.
Important
The audio file shall be saved on the USB device. You need to connect the USB device all the time;
otherwise, the audio link function may fail. So, if you want to use the audio trigger function,
please make sure the audio file is on the UBS device and the USB device has connected to the
NVR before the NVR boots up. You need to make sure the USB device connection is always there
if you want to manage and use the audio file function.

Dahua nvr4208-8p Specifications

General

Operating System	Embedded LINUX
IP Camera Input	8 channel
Two-way Talk	1 channel Input, 1 channel Output, RCA
Interface	1 HDMI, 1 VGA
OSD	Camera title, Time, Video loss, Camera lock, Motion detection, Recording
Record Interval	1 ~ 120 min (default: 60 min), Pre-record: 1 ~ 30 sec, Post-record: 10 ~ 300 sec
Ethernet	1 RJ-45 Port (10/100/1000Mbps)
Max. User Access	128 users
Smart Phone	iPhone, iPad, Android
HDD Bays	1
Operating Temperature	-10°C ~ +55°C (+14°F ~ +131°F)
Main Processor	Dual-core embedded processor
Multi-screen Display	1/4/9
Video Detection and Alarm	Motion Detection, MD Zones: 396 (22 x 18), Video Loss, Camera Blank
Alarm input	4
Relay Output	2
Compression	H.265, H.264
Recording Resolution	Up to 8MP
Record Mode	Manual, Schedule (Regular, Continuous), MD (Video detection: Motion Detection, Camera Blank, Video Loss)
PoE	8 ports (IEEE802.3af/at)
Protocols	HTTP, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPoE, DDNS, FTP, Alarm Server, IP Search (Support Dahua IP camera, DVR, NVS, etc.)
USB Interface	2 USB2.0
Power Supply	AC 100~240V, 50/60 Hz
Power Consumption	NVR: <10W (without HDD), PoE: Max 25.5W for single port, 130W total
Operating Humidity	10%~90% RH