There was a case, once I plugged a Huawei 171 modem with a SIM card Megaphone in Debian 8 KDE and debian recognized it, made the connection, asked me only to check the APN, everything worked, the Internet was. Now we need to configure it on CentOS, in the distribution - FreePBX 12.0.76.2 'VoIP Server' .
I looked at whether the system sees the device with the lsusb command - sees and optsonaet the model, then with the ifconfig -a command I look at the connections and see only eth0 and lo , nothing resembling wlan0 is present, NetworkManager is running, I would like to know how to raise the modem through the console in general if the system does not see it as modem.