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Comparison Hikvision DS-7616NI-K2/16P vs Hikvision DS-7616NI-I2/16P

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Hikvision DS-7616NI-K2/16P
Hikvision DS-7616NI-I2/16P
Hikvision DS-7616NI-K2/16PHikvision DS-7616NI-I2/16P
from £287.63 
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Typedigital NVRdigital NVR
Camera connection16 channels16 channels
Features
Features
motion response
motion response
Connectors
RCA audio input11
RCA audio output11
USB 2.021
USB 3.2 gen11
HDMI
/maximum 3840x2160 px./
1
Max. HDMI resolution3840x2160 (4K)
VGA
/maximum 1920x1080 px./
/maximum 1920x1080 px/
LAN
/16 PoE ports/
1
LAN speed1 Gbps
Alarm input44
Alarm output11
Video recording
Bandwidth160/160 Mbps160/256 Mbps
Resolution (all channels)1920x1080 px1280x720 px
Frame rate50 fps
Video compression formatH.265, H.264, MPEG4H.264
Max. resolution (IP)4096x2160 px12 MP (~4000x3000 pixels)
Drives
Number of SATA22
Max. total capacity
12 TB /2x6TB/
12 TB /2x6TB/
PoE power
PoE (output)802.3af/at802.3af
PoE outputs1616
Power per PoE output30 W15 W
Total PoE power200 W
General
Power supply100 – 240В100 – 240В
Power consumption15 W280 W
Operating temperature-10 °C ~ +55 °С-10 °C ~ +55 °С
Maximum humidity90 %90 %
CMS
Dimensions385x315x52 mm380x290x45 mm
Weight3 kg3 kg
Added to E-Catalogseptember 2017october 2016

USB 2.0

The number of USB 2.0 ports provided in the design of the registrar. USB is a universal interface for connecting various peripheral devices. In the case of registrars, we are most often talking about "flash drives" and other external media that can be used to copy files or update firmware. However, compatibility with other devices, such as manipulators (keyboards or mice), may also be provided.

Specifically, USB 2.0 allows you to transfer data at speeds up to 480 Mbps and provides a relatively low power supply. Because of this, this version is generally considered obsolete and is gradually being replaced by more advanced standards (primarily USB 3.2 gen1 - see the corresponding paragraph). However, USB 2.0 connectors are still very popular in registrars.

USB 3.2 gen1

The number of USB 3.2 gen1 ports in the design of the registrar. This interface is used to connect various peripheral devices: USB drives for copying files or updating firmware, keyboards, mice, etc.

Specifically, USB 3.2 gen1 is the successor to USB 2.0. It supports higher data transfer (up to 4.8Gbps) and higher power supply.

Max. HDMI resolution

Maximum HDMI resolution.

The maximum image resolution that can be output via HDMI to the screen of the connected video equipment (monitor, TV, etc.). The HDMI output on the DVR allows you to stream Full HD, 2K or 4K images for high quality multi-screen images.

LAN speed

The maximum data transfer rate supported by the DVR's LAN ports.

Note that for simple tasks, a rather modest by modern standards speed of 100 Mbps is often enough. However, high bandwidth ( 1 Gbps) not only simplifies the transfer of large amounts of data, but also helps to reduce lags and improve the overall quality of communication; and modern technologies make it possible to provide support for gigabit LAN even in fairly simple and inexpensive registrars.

Of course, in order to use all the features of the LAN, it is necessary that the devices connected to such ports also support the appropriate speeds.

Bandwidth

The maximum data stream in Mbit/s that the NVR is capable of processing when recording and displaying. The throughput parameter is specified as the maximum incoming/outgoing speed, or as the sum of incoming and outgoing streams (total throughput). It is calculated in such a way that the throughput exceeds the total flow of all IP cameras connected to the DVR, and another 25–30% is put in reserve for playing video or viewing it via network access.

Resolution (all channels)

The highest resolution in which the recorder can record video when a signal is received from all channels simultaneously. If cameras are not connected to some channels, the recording resolution may be higher (see “Maximum Resolution”).

Higher resolution has a positive effect on detail, but takes up more space and requires more computing power for processing, which accordingly affects the price of the registrar.

Frame rate

The highest frame rate in the recorded video that the recorder can support when recording from all available channels simultaneously. If not all channels are occupied by cameras, this figure may be higher.

The minimum required for comfortable viewing is 24 fps. And in the most modern video standards, the frame rate can be much higher — 50 – 60 fps. Higher values result in better quality and smoother video that allows you to clearly see fast movement; however, such video takes up more space and requires powerful hardware, which affects the price of recorders.

Video compression format

Standards (codecs) used by the recorder to compress the recorded video.

This parameter is important when viewing recorded materials on another device — for example, a media centre, into which a "flash drive" with files from the recorder is inserted. For normal viewing, it is necessary that the player supports the appropriate codec — otherwise the video will be displayed with distortion or will not work at all. Technical details on various standards can be found in special sources.

Note that if you plan to view the materials on a computer, you can not pay much attention to this parameter: most modern operating systems have extensive built-in sets of codecs, and if you don’t have the right codec, you can easily find it on the Internet.

Max. resolution (IP)

The maximum supported resolution of IP cameras with which the NVR is technically capable of working (primarily recording). With rare exceptions, devices record in maximum resolution from all connected IP cameras. However, the limiting factor here is bandwidth (see the relevant paragraph) – depending on the shooting conditions, it may not be enough.

High resolution allows you to get a more detailed image in which fine details are better visible. On the other hand, such videos take up large amounts of disk space, and their support significantly affects the cost of the device.
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