Are there any modems with a sim card to connect to the router in the WAN port?

Question

Iron

Good afternoon.
There are routers with two WAN ports. There was a need to reserve the Internet. There is no possibility to connect a second wired provider.
The router does not have usb inputs for connecting, for example, a 3g USB modem.
I looked at GSM modems, but they have an RS-232 output. I'm not sure that the router will be able to communicate with these modems through the RS-232 - RJ-45 adapter when connected to the WAN port.
Are there any DSL-like modems into which SIM cards can be inserted? It is the modems that get the external IP on the WAN port of the router to raise the VPN.

Answer 1

Well, you turned down :)
but territorially, where is it?
They 've been trying to get through to me for a month now . Persuaded, I'm waiting for a piece of iron for a test drive.
And I think it will also be clear how you act.
I believe you understand that you need a router that will work fine in conjunction with a modem.
Or the link offers a kind of beautiful solution. as if connecting to a better transmitting operator. + More static like there is.

Answer 2

Mikrotik Rb-411

Answer 3

There are no such things. Only if you take a ready-made modem router from a provider that has a LAN port and accepts SIM cards. It costs about 7 thousand.

Answer 4

mikrotik RB 951ui-2hnd. 5eth ports each can be isolated from each other + USB for 3g and 4g modems. Everything works - tested many times.