How to connect IP cameras via Ethernet via 3G Wi-Fi modem?

Hello, I need some help.

There is a Wi-Fi modem from a mobile operator. And there are surveillance cameras that have a port for internet cable.

Question – what device is on the market probably a router – repeater, which will be able to receive Wi-Fi signal from the mobile modem and transmit the Internet through the Internet cable to the cameras?

Maybe there is a much simpler circuit, thanks in advance.

Answer

Hello. What are the cameras, how many do you have? How will you watch them, over the internet? Maybe they can connect via wifi. This is very important information in this case.

I think you have two options (if you can’t get normal, cable internet):

Instead of your 3G/4G modem, which is now giving out wi-fi, buy a regular USB modem. Perhaps, even the same operator. And buy a regular Wi-Fi router under this modem, which supports the connection of USB-modems. But here you need to be careful that the equipment was compatible. You can read the article: wi-fi router for USB 3G/4G modem. How to choose the right one. Almost all of these routers have 4 LAN ports to which you can connect your CCTV cameras. It seems to me that this scheme will also be more stable than the usual mobile Wi-Fi router.
The second option is to put some other device that will receive internet from your modem via wi-fi, and transmit it to the cameras via network cable. Repeaters in the Wi-Fi adapter mode (when they take internet via wi-fi, and give it via cable). But they usually have 1 LAN port. It is for each camera you need to put a repeater. Not a good idea. And also costly.
Router in repeater mode, or WDS (wireless bridge). This is already better, as the router will connect to your modem and will give internet to 4 cameras (usually they have 4 LAN ports). Many routers are smart enough to work in these modes.
But through the same repeater, or router, the network can be very unstable. In addition, you also have wireless Internet, which is not distinguished by stability.

I think I have answered your question.