Comparison CTV DP4101AHD vs Slinex SL-10IP

The main components and the number of their copies supplied as standard equipment.

— Intercom. This section specifies delivery options with several internal units that can be connected to one call panel. Such a complete set will come in handy if it is necessary to establish a connection for several subscribers or install internal intercoms to service one subscriber, but at several points (for example, to organize an intercom or deploy equipment in a large house).

— With a call panel. The presence of a call panel directly in the intercom package. This option for supplying equipment eliminates the need to buy a call panel separately — the standard call device is most often optimally suited to a given intercom model, while difficulties may arise with the selection of a third-party panel.

— Number of subscribers. In this context, it is implied that several subscribers can be called from the complete call panel, and their specific number is indicated.

Regular installation method provided in the intercom. This parameter is relevant for models that are not portable (see "Execution"), the options may be as follows.

- Mounted. Installation by hanging on studs, hooks or other similar fasteners. This method is the simplest, besides, if necessary, the intercom can be moved to another place without much difficulty; and there are no obvious shortcomings in the hinged installation. Therefore, this option is used by most stationary (not portable) intercoms.

- Embedded. Mounting, in which the body of the device is hidden in the wall recess, and only the control panel is located outside. The latter is almost flush with the wall surface, due to which the intercom takes up a minimum of space, and also looks stylish and neat. In addition, such a device cannot be thrown to the floor with a careless movement, while mounted models have such a possibility. On the other hand, the installation of built-in intercoms is much more difficult due to the need to prepare a niche, and these advantages are not often key. Because of this, this option is rare, mainly in premium models designed for rich interiors.

The total number of ports for wired connection of various equipment provided in the intercom; in fact — the maximum number of wired devices that can be simultaneously connected to the intercom.

Keep in mind that this number may be less than the total amount of supported devices. This is especially true in models with the possibility of using additional monitors (see "Connected monitors"): such devices are often connected in series, "chained" and occupy only 1 port. Thus, for example, an intercom for 2 calling panels and 3 monitors can have only 3 connectors — one for calling panels and one for monitors. Note also that the LAN port in IP intercoms (see "Device type") is also taken into account in this calculation.

The number of additional monitors that can be connected to the intercom at the same time.

This function is relevant only for video-enabled models — video intercoms and IP intercoms (see “Device type”). In such models, the intercom itself is called a monitor — an indoor unit with a screen. This paragraph indicates how many additional indoor units can be connected to this model. The need for such a connection arises in cases where access to the security system must be provided from several points at once — for example, in a private house on several floors, where it would be inconvenient to run from floor to floor to the intercom. In this case, intercoms with access to 3 monitors, 4 monitors or more are appropriate.

Note that the format of multiple monitors working together may be different, see "Connection Type" for more details.

Type of display installed in the intercom.

- Colored. Color displays are slightly more expensive than monochrome displays, but in our time this difference is extremely insignificant (especially compared to the price of the intercom as a whole). And the image on such screens turns out to be as reliable and pleasing to the eye as possible. Especially on IPS screens. Therefore, this option is used in most intercoms with screens.

— Monochrome. Black and white screens that can only reproduce shades of gray. They are cheaper than color ones, however, the image on such a screen is not as high quality - and the difference in price does not always justify the difference in quality. As a result, such screens are used much less frequently.

Models are also produced that are not equipped with displays at all - these are primarily audio intercoms (see “Device type”), as well as some IP intercoms that do not support video and are configured from a computer via the network.

Diagonal size of the intercom's own display.

In modern intercoms, there are displays ranging in size from 2 "to 10" — smaller screens are non-functional, larger ones are unreasonably bulky and expensive. At the same time, you can normally view the image on almost any display from this range — if you lean close enough to it.

With all this in mind, it makes sense to specifically look for a large screen (10 ") if you need to see it normally from a long distance (a metre or more), or if you do not want to strain your eyes once again, peering into a small image. Golden the middle is the 7" display.

A device for working with removable memory cards. Like built-in memory (see above), such media are used to record data from video panels and cameras; At the same time, for intercoms with card readers, the presence of a DVR is almost mandatory (see above), and it is the video that is saved to the memory card. This is more justified than using built-in memory for this purpose: removable media is cheaper per megabyte of volume and is better suited for large files, such as video recordings. In addition, we note that the card can be removed and installed in another device - for example, to copy footage to a computer or view it on a smartphone. The card may come included, but more often it must be purchased separately. It is worth considering the type and format of media supported by the card reader, as well as the maximum amount of memory with which it is compatible.

The amount of energy consumed by the intercom in standby mode. In this mode, the device is energized and is in a state of readiness to receive a call; no functions are used, and the readiness itself does not require a lot of energy. Therefore, the value of this parameter, usually, is rather low, and you should pay attention to it only if you fundamentally strive for maximum efficiency of the installed equipment.

Power consumption of the intercom in the operating mode. Usually, this item indicates the value for situations where the device's functions are used to the fullest — in particular, when the display is on and the speakerphone is on (if any, see above). Note that the consumption in the operating mode rarely exceeds 20 W, so in most cases it is more of a reference, and not a practically significant parameter.