There's a point of view, and you can finally say that you agree with this point of viewThe following is a paraphrase of the views of netizens on a forum:
You think that modern communication tools are cheap now, and you question that the police are still using old-fashioned walkie-talkies, but in fact, you are very wrong.
Do you think the police are reluctant to use the new one?Too willing, the problem is, can't afford .......
First of all, the so-called old-fashioned handset is actually not old, but has been digitized (some places are still using Motorola's second-generation tetra, or even a generation of analog).
He is a wireless universal handset based on the 350MHz frequency band, what is the biggest benefit?
Two words, cheap.
Don't forget, a complete communication system is not only the terminal you see, but also the base station, the terrestrial network, the platform, and finally the national network.
For a 350MHz base station, one site can theoretically cover half of the county, and a prefecture-level city urban area, that is, about 10 sites, can achieve city-wide coverage.
Moreover, this network, together with the private network on the ground, is closed and physically isolated, and of course there must be a set of special control and switching software in the background.
Now the public security mobile phone will distribute a special dual system mobile phone,That is, the transformed security mobile phone,You can log in directly to the public security intranet,The current mainstream model has been HuaweiMate series,Now it is mate30Modified,And this thing,Or the public security network accessed through the public network virtual routing,The function is limited,Mainly that is, some basic outdoor office functions,And its essence is still a mobile phone,There is no three-proof design for the outdoors,But even so,It is much more expensive than a PDT handset for a few hundred yuan,It is also much more expensive than the ordinary mate30。
So is there a more advanced police handset, there really is.
This thing,Support special 4G frequency band (non-civil),You have to use a special SIM card,Can only be used in the private network,Made three defense improvements,Make a security system,Theoretically, it can replace the police law enforcement recorder,PDT handset,PDA terminal and other equipment。
However, his ** is much more expensive than these devices combined. If you want to make one for the people's police and auxiliary police, there is really no money.
Not to mention, this thing can't use the operator's base station, it needs a special 4G base station construction, and the coverage of 4G is far less than 350M, which means that the base station is much more expensive than the original, the number must be at least 5 times more than the original, in order to achieve full coverage of the urban area.
Moreover, the increase in its bandwidth means a significant increase in the cost of building or leasing terrestrial networks.
Its private network developed based on 4G technology, your back-end core network also needs to be specially built.
As far as I know, only a very small number of developed areas and particularly sensitive areas in China have built special 4G base station coverage to facilitate the use of 4G handsets by the police.
Ordinary city police don't have this money.
As for 5G dedicated base stations and terminals, they do not exist yet.
What do you think?Welcome to discuss.