Setup CME as sms gateway

Hi there,
I have a MikroTik CME gateway and would like to use it only for sending and receiving SMS. (I will do this with the API via /tool/sms.)

I have a working SIM card without a PIN. I supply the CME with Internet via eth1. (The SIM should therefore only be used for SMS).

I would be very grateful for tips or instructions on how to implement this project.

I tried to send SMS, but it did not work. Now I returned the CME. — case closed —