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Considerations for selecting wireless video door phones
2011-02-26 08:40:55
With the rapid development of science and technology, global security and multimedia communications has entered a new period in the field, but also because the inherent advantages of wireless video intercom system (such as setting up a flexible and convenient, suitable for mobile and so on), are used in a variety of security and the field of communications and consumer electronics in popularity. Wireless video intercom system on the market is good or bad is mixed, then in the case of lack of experience or lack of experience, how to choose a good wireless video intercom system for many people a headache problem, now I'll take out several views on their own to share with you, hoping to bring you some help.

Since it is a choice considerations for wireless video intercom system, then for everyone from "wireless" and "Visual" and "talk" and "additional considerations" in four aspects:

1. wireless
What is wireless? as its name suggests is that no lines, no fixed, suitable for the mobile, flexible and easy to use, so here we should note that in several problems arising during the move. First, can mobile of open to effective distance has more far? traditional simulation signal open to distance in 100 m around, now 2.4G of application can makes its distance reached 300 m even more far, currently market Shang comparison more do 100-200 m, and HongZhao Innovation Electronic trillion design development of 2.4G wireless programme some effect distance can reached 300 m, this to special note, because it of open to distance directly on effect in obstructions before of signal penetrating capacity and stability. Second, to note wireless transmission process of anti-interference sexual how? now technology developed has, many things are is wireless transmission of, Bluetooth Ah wireless NIC AH or something even is as of wireless products, so if touch in together using, will was what degree of interference was lane understand, currently market Shang better of wireless Visual on told system can do since adaptation jump frequency technology, million group password on code mode, anti-interference capacity is very strong, but also there is no shortage of some pass of wireless Visual on told system development company let members buy to rotten cargo, members in select Shi must to note carefully distinction. Wireless is the most important in these 2 points, there are other details we can according to their requirements to differentiate and choice.

2. the Visual
Visual is better understood, mainly is the sharpness of the image, the image is how many pixels? picture how? is there any night vision?

3. intercom
Is the issue of voice to speak, and special attention for the following several points here. First of all, is what talk? is full duplex Talkback, semi-duplex or is Simplex? full duplex Talkback enables free exchanges on both sides say, sync the two, it seems we usually call, like speaking but also to hear the person's voice. Half duplex on told is information in two points Zhijian can in two a direction Shang for sent, but cannot while sent of work way, lift a simple examples, a section narrow narrow of road, while only has a car car through, dang currently has two volume car outside, this situation Xia on only a car first has, until head Hou another a car again open, this examples on image of description has half duplex of principle, half duplex of defects is obvious, in noisy of environment in the is may only heard noise, Xia rainy day listening to rain sound, as technology of constantly progress, half double unions gradually exit history stage. Simplex is the vintage radio Talkback, sends information between two points in only one direction of works, a finished another said. Everyone in the choose a wireless video intercom system when you can choose according to their specific requirements and applicability to! many play language games written a duplex on the market, we must ask is full duplex or half duplex. Second, the intercom sound is clearer? intermittent and whether there are serious delays? do not buy a wireless video intercom system, hear only talk over there for a minute here, still a cluttered, that it is better to run errands said in the past, made a joke, just wanted to remind everyone to note in this regard.

4. other considerations
Additional considerations are identified after the performance in all aspects of wireless video intercom system, the whole system is able to run normal operations and in the context of their requirements, for example, look how? whether it is in normal operation in the harsh environment? whether anti-low temperature resistant, waterproof sunscreen, and so on?

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