My (not vast) experience with this stuff is that it’ll often get plugged directly into an LTE-Ethernet modem. Or, depending on the vintage of the equipment, the

My (not vast) experience with this stuff is that it’ll often get plugged directly into an LTE-Ethernet modem. Or, depending on the vintage of the equipment, the chain looks more like LTE-Ethernet modem connected to a “serial port concentrator” with Ethernet on one side and a bunch of serial ports on the other side. Sometimes the installers will turn on IP Whitelisting on the inbound ports, but sometimes that gets skipped.